SSL VPN Configuration Guide, Cisco IOS Release 15M&T
SSL VPN
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SSL VPN

Contents

SSL VPN

Last Updated: December 20, 2012

The SSL VPN feature or WebVPN provides support in the Cisco IOS software for remote user access to enterprise networks from anywhere on the Internet. Remote access is provided through a Secure Socket Layer (SSL)-enabled SSL VPN gateway. The SSL VPN gateway allows remote users to establish a secure VPN tunnel using a web browser. This feature provides a comprehensive solution that allows easy access to a broad range of web resources and web-enabled applications using native HTTP over SSL (HTTPS) browser support. SSL VPN delivers three modes of SSL VPN access: clientless, thin-client, and full-tunnel client support.

This document is primarily for system administrators. If you are a remote user, see the document"SSL VPN Remote User Guide".


Note


The Cisco AnyConnect VPN Client is introduced in Cisco IOS Release 12.4(15)T. This feature is the next-generation SSL VPN Client. If you are using Cisco software earlier than Cisco IOS Release 12.4(15)T, you should be using the SSL VPN Client and use the GUI for the SSL VPN Client when you are web browsing. However, if you are using Cisco Release 12.4(15)T or a later release, you should be using the Cisco AnyConnect VPN Client and use the GUI for Cisco AnyConnect VPN Client when you are web browsing.

Note


Security threats, as well as the cryptographic technologies to help protect against them, are constantly changing. For more information about the latest Cisco cryptographic recommendations, see the Next Generation Encryption (NGE) white paper.

Finding Feature Information

Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table at the end of this module.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.

Prerequisites for SSL VPN

To securely access resources on a private network behind an SSL VPN gateway, the remote user of an SSL VPN service must have the following:

  • An account (login name and password)
  • An SSL-enabled browser (for example, Internet Explorer, Netscape, Mozilla, or Firefox)
  • Operating system support
  • "Thin-client" support used for TCP port-forwarding applications requires administrative privileges on the computer of the remote user.
  • "Tunnel mode" for Cisco SSL VPN requires administrative privileges for initial installation of the full-tunnel client.
  • The remote user must have local administrative privileges to use thin-client or full-tunnel client features.
  • The SSL VPN gateway and context configuration must be completed before a remote user can access resources on a private network behind an SSL VPN. For more information, see the "How to Configure SSL VPN Services on a Router" section.
  • Access control list (ACL) Support--The time range should have already been configured.
  • Single SignOn Netegrity Cookie Support--A Cisco plug-in must be installed on a Netegrity SiteMinder server.
  • Licensing--In Cisco IOS Release 15.0(1)M, the SSL VPN gateway is a seat-counted licensing feature on Cisco 880, Cisco 890, Cisco 1900, Cisco 2900, and Cisco 3900 platforms. A valid license is required for a successful SSL VPN session.
  • SSL VPN-supported browser--The following browsers have been verified for SSL VPN. Other browsers might not fully support SSL VPN features.

    Note


    Later versions of the following browsers are also supported.
    • Firefox 2.0 (Windows and Linux)
    • Internet Explorer 6.0 or 7.0
    • Linux (Redhat RHEL 3.0 +, FEDORA 5, or FEDORA 6)
    • Macintosh OS X 10.4.6
    • Microsoft Windows 2000, Windows XP, or Windows Vista
    • Safari 2.0.3

Restrictions for SSL VPN

General Restrictions for SSL VPN

  • URLs referred by the Macromedia Flash player cannot be modified for secure retrieval by the SSL VPN gateway.
  • Cisco Secure Desktop (CSD) 3.1 and later versions are not supported.

PKI AAA Authorization Using the Entire Subject Name

  • Some AAA servers limit the length of the username (for example, to 64 characters). As a result, the entire certificate subject name cannot be longer than the limitation of the server.
  • Some AAA servers limit the available character set that may be used for the username (for example, a space [ ] and an equal sign [=] may not be acceptable). This functionality will not work for a AAA server having such a character-set limitation.
  • The subject-name command in the trust point configuration may not always be the final AAA subject name. If the fully qualified domain name (FQDN), serial number, or IP address of the router are included in a certificate request, the subject name field of the issued certificate will also have these components. To turn off the components, use the fqdn, serial-number, and ip-address commands with the none keyword.
  • Certificate Authority (CA) servers sometimes change the requested subject name field when they issue a certificate. For example, CA servers of some vendors switch the relative distinguished names (RDNs) in the requested subject names to the following order: CN, OU, O, L, ST, and C. However, another CA server might append the configured Lightweight Directory Access Protocol (LDAP) directory root (for example, O=cisco.com) to the end of the requested subject name.
  • Depending on the tools you choose for displaying a certificate, the printed order of the RDNs in the subject name could be different. Cisco IOS software always displays the least significant RDN first, but other software, such as Open Source Secure Socket Layer (OpenSSL), does the opposite. Therefore, if you are configuring a AAA server with a full DN (subject name) as the corresponding username, ensure that the Cisco IOS software style (that is, with the least-significant RDN first) is used.

Cisco AnyConnect VPN Client

The Cisco AnyConnect VPN Client is not supported on Windows Mobile when the client connects to a Cisco IOS headend router (supported in Cisco IOS Release 15.0(1)M and later releases). The Cisco AnyConnect VPN Client does not support the following:

  • Client-side authentication (supported in Cisco IOS Release 15.0(1)M and later releases)
  • Compression support
  • IPsec
  • IPv6 VPN access
  • Localization
  • Sequencing
  • Standalone mode (supported in Cisco IOS Release 12.4(20)T and later releases)

Thin-Client Control List Support

Although there is no limitation on the maximum number of filtering rules that can be applied for each ACL entry, keeping the number below 50 should have no impact on router performance.

HTTP Proxy

The HTTP Proxy feature works only with Microsoft Internet Explorer.

The HTTP Proxy feature will not work if the browser proxy setup cannot be modified because of any security policies that have been placed on the client workstation.

Features Not Supported on the Cisco IOS SSL VPN

The following features are not supported on the Cisco IOS SSL VPN:

  • Application Profile Customization Framework (APCF): an XML-based rule set for clientless SSL VPN
  • Cisco Unified Communications Manager (Cisco UCM) 8.0.1 VPN-enabled 7900 series IP phones
  • Dynamic Access Policies (DAP)
  • Java and ActiveX Client Server Plugins
  • Lightweight Directory Access Protocol (LDAP) Support
  • On Board Built-in Single Sign On
  • Portal Page Customization
  • SharePoint Support
  • Smart Tunnels
  • Support for External Statistics Reporting and Monitoring Tools
  • Using Smartcard for Authentication (supported in Cisco IOS Release 15.0(1)M and later releases)
  • The following features were introduced in the AnyConnect 2.5.217 release:
    • AnyConnect Profile Editor
    • Captive Portal Hotspot Detection
    • Captive Portal Remediation
    • Client Firewall with Local Printer and Tethered Device Support
    • Connect Failure Policy
    • Optimal Gateway Selection
    • Post Log-in Always-on VPN
    • Quarantine

Note


The features introduced in AnyConnect 2.5 are not supported although you can connect to a Cisco IOS headend using AnyConnect 2.5. However, features introduced in AnyConnect 2.4 and earlier releases are supported when you are connected to a Cisco IOS headend using AnyConnect 2.5 or AnyConnect 3.0.

Information About SSL VPN

SSL VPN Overview

Cisco IOS SSL VPN provides SSL VPN remote-access connectivity from almost any Internet-enabled location using only a web browser that locally supports SSL encryption. This feature allows your company to extend access to any authorized user/corporate resources to its secure enterprise network by providing remote-access connectivity from any Internet-enabled location.

Cisco IOS SSL VPN can also support access from noncorporate-owned machines, including home computers, Internet kiosks, and wireless hot spots. These locations are difficult places to deploy and manage VPN client software and the remote configuration required to support IPsec VPN connections.

The figure below shows how a mobile worker (For example, a lawyer at the courthouse) can access protected resources from a main office and its branch offices. Site-to-site IPsec connectivity between the main and remote sites is unaltered. The mobile worker needs only Internet access and supported software (web browser and operating system) to securely access the corporate network.

Figure 1 Secure SSL VPN Access Model


SSL VPN delivers the following three modes of SSL VPN access:

  • Clientless--Clientless mode provides secure access to private web resources and will provide access to web content. This mode is useful for accessing most content that you would expect to access in a web browser, such as Internet access, databases, and online tools that employ a web interface.
  • Thin client (port-forwarding Java applet)--Thin-client mode extends the capability of the cryptographic functions of the web browser to enable remote access to TCP-based applications such as Post Office Protocol version 3 (POP3), Simple Mail Transfer Protocol (SMTP), Internet Message Access protocol (IMAP), Telnet, and Secure Shell (SSH).
  • Tunnel mode--Full-tunnel client mode offers extensive application support through its dynamically downloaded Cisco AnyConnect VPN Client (next-generation SSL VPN Client) for SSL VPN. Full tunnel client mode delivers a lightweight, centrally configured and easy-to-support SSL VPN tunneling client that provides network layer access to virtually any application.

SSL VPN application accessibility is somewhat constrained relative to IPsec VPNs; however, SSL-based VPNs provide access to a growing set of common software applications, including web page access, web-enabled services such as file access, e-mail, and TCP-based applications (by way of a downloadable thin-client applet). SSL-based VPN requires slight changes to user workflow because some applications are presented through a web browser interface, not through their native GUI. The advantage for SSL VPN comes from accessibility from almost any Internet-connected system without the need to install additional desktop software.

Licensing

Starting in Cisco IOS Release 15.0(1)M, the SSL VPN gateway is a seat-counted licensing feature on the Cisco 880, Cisco 890, Cisco 1900, Cisco 2900, and Cisco 3900 platforms. A license count is associated with each license, and the count indicates the instances of the feature available for use in the system. In the case of SSL VPN, a seat refers to the maximum number of sessions allowed at a time.

You can get the license at http://www.cisco.com/go/license.

For instructions on installing a license using Cisco License Manager (CLM), see the User Guide for Cisco License Manager, Release 2.2 at http://www.cisco.com/en/US/docs/net_mgmt/license_manager/lm_2_2/2.2_user_guide/clm_book.html.

For instructions on installing a license using Cisco CLI, see the "Cisco IOS Software Activation Tasks and Commands" chapter of the Software Activation Configuration Guide at http://www.cisco.com/en/US/docs/ios/csa/configuration/guide/csa_commands_ps6441_TSD_Products_Configuration_Guide_Chapter.html.

SSL VPN supports the following types of licenses:

  • Permanent licenses--No usage period is associated with these licenses. All permanent licenses are node locked and validated during installation and usage.
  • Evaluation licenses--These are metered licenses that are valid for a limited period. The usage period of a license is based on a system clock. The evaluation licenses are built into the image and are not node locked. The evaluation licenses are used only when there are no permanent, extension or grace period licenses available for a feature. An end-user license agreement (EULA) has to be accepted before using an evaluation license.
  • Extension licenses--Extension licenses are node-locked metered licenses. These licenses are installed using the management interfaces on the device. A EULA has to be accepted as part of installation.
  • Grace-rehost licenses--Grace period licenses are node locked metered licenses. These licenses are installed on the device as part of the rehost operation. A EULA has to be accepted as a part of the rehost operation.

For all the license types, except the evaluation license, a EULA has to be accepted during the license installation. This means that all the license types except the evaluation license are activated after installation. In the case of an evaluation license, a EULA is presented during an SSL VPN gateway configuration or an SSL VPN context configuration.

An SSL VPN session corresponds to a successful login of a user to the SSL VPN service. An SSL VPN session is created when a valid license is installed and the user credentials are successfully validated. On a successful user validation, a request is made to the licensing module to get a seat. An SSL VPN session is created only when the request is successful. If a valid license is not installed, the SSL VPN gateway configuration and SSL VPN context configuration can be successful, but the user cannot log in successfully. When multiple gateways and contexts are configured, the total number of sessions are equal to the total sessions allowed by the license. A seat count is released when a session is deleted. A session is deleted because of reasons such as log out by the user, session idle timeout or Dead Peer Detection (DPD) failure.


Note


Rarely a few sessions which do not have active connections may appear to be consuming licenses. This typically denotes that this is a transition state and the session will get expired soon.

The same user can create multiple sessions and for each session a seat count is reserved. The seat reservation does not happen in the following cases:

  • Multiple TCP connections, such as web server content, Outlook Web Access (OWA), and Common Intermediate Format (CIF) file shares.
  • Port forward session initiation.
  • Full-tunnel session creation from a browser session.
  • Full-tunnel session is up and a crypto rekey is done.

When the total active sessions are equal to the maximum license count of the current active license, no more new sessions are allowed.

The reserved seat count or session is released when

  • a user logs out.
  • a DPD failure happens.
  • a session timeout occurs.
  • an idle timeout occurs.
  • a session is cleared administratively using the clear webvpn session command.
  • a user is disconnected from the tunnel.
  • a context is removed even when there are active sessions.

You can use the show webvpn license command to display the available count and the current usage. To display the current license type and time period left in case of a nonpermanent license, use the show license command. To get information related to license operations, events, and errors, use the debug webvpn license command.

For migrating from any Cisco IOS 12.4T release to Cisco IOS 15.x release, use the license migration tool at https://tools.cisco.com/SWIFT/Licensing/LicenseAdminServlet/migrateLicense.

New Cisco IOS SSL VPN licenses that are generated are cumulative. Therefore the old licenses become inactive when a new license is applied. For example, when you are upgrading your license from 10 counts to 20 counts (an increase of 10 counts on the current 10 counts), Cisco provides a single 20 count license. The old license for 10 counts is not required when a permanent license for a higher count is available. However, the old license will exist in an inactive state as there is no reliable method to clear the old license.

In Cisco IOS Release 15.1(4)M1 and later releases, a Crypto Export Restrictions Manager (CERM) license is reserved only after the user logs in. If you have an Integrated Services Router Generation 2 (ISR G2) router with a CERM license, you must upgrade to Cisco IOS Release 15.1(4)M1 or later releases. Before Cisco IOS Release 15.1(4)M1, a CERM license is reserved for every SSL or Transport Layer Security (TLS) session.

Modes of Remote Access

Remote Access Overview

End-user login and authentication is performed by the web browser to a secure gateway using an HTTP request. This process creates a session that is referenced by a cookie. After authentication, the remote user is shown a portal page that allows access to the SSL VPN networks. All requests sent by the browser include the authentication cookie. The portal page provides all the resources available on the internal networks. For example, the portal page could provide a link to allow the remote user to download and install a thin-client Java applet (for TCP port forwarding) or a tunneling client.

The figure below shows an overview of the remote access modes.

Figure 2 Modes of Remote Access Overview


The following table summarizes the level of SSL VPN support that is provided by each access mode.

Table 1 Access Mode Summary

A-- Clientless Mode

B--Thin-Client Mode

C--Tunnel Mode

  • Browser-based (clientless)
  • Microsoft Windows or Linux
  • Web-enabled applications, file sharing, OWA
  • Gateway performs address or protocol conversion and content parsing and rewriting
  • TCP port forwarding
  • Uses Java Applet
  • Extends application support
  • Telnet, e-mail, SSH, Meeting Maker, Sametime Connect
  • Static port-based applications
  • Works like "clientless" IPsec VPN
  • Tunnel client loaded through Java or ActiveX (approximately 500 kb)
  • Application agnostic--supports all IP-based applications
  • Scalable
  • Local administrative permissions required for installation

Clientless Mode

In a clientless mode, the remote user accesses the internal or corporate network using the web browser on the client machine. The PC of the remote user must run the Windows 2000, Windows XP or Linux operating systems.

The following applications are supported in a clientless mode:

  • Web browsing (using HTTP and HTTPS)--provides a URL box and a list of web server links in the portal page that allows the remote user to browse the web.
  • File sharing [using common Internet file system (CIFS)]--provides a list of file server links in the portal page that allows the remote user to do the following operations:
    • Browse a network (listing of domains)
    • Browse a domain (listing of servers)
    • Browse a server (listing of shares)
    • List the files in a share
    • Create a new file
    • Create a directory
    • Rename a directory
    • Update a file
    • Download a file
    • Remove a file
    • Rename a file

Note


Linux requires that the Samba application is installed before CIFS file shares can be remotely accessed.
  • Web-based e-mail, such as Microsoft Outlook Web Access (OWA) 2003 (using HTTP and HTTPS) with Web Distributed Authoring and Versioning (WebDAV) extensions--provides a link that allows the remote user to connect to the exchange server and read web-based e-mail.

Thin-Client Mode

Thin-client mode, also called TCP port forwarding, assumes that the client application uses TCP to connect to a well-known server and port. In thin-client mode, the remote user downloads a Java applet by clicking the link provided on the portal page, or the Java applet is downloaded automatically (see the Options for Configuring HTTP Proxy and the Portal Page and Options for Configuring HTTP Proxy and the Portal Page section). The Java applet acts as a TCP proxy on the client machine for the services that you configure on the gateway.

The applications that are supported in thin-client mode are mainly e-mail-based (SMTP, POP3, and Internet Map Access Protocol version 4 [IMAP4]) applications.


Note


The TCP port-forwarding proxy works only with the Sun Microsystems Java Runtime Environment (JRE) version 1.4 or later versions. A Java applet is loaded through the browser that verifies the JRE version. The Java applet will refuse to run if a compatible JRE version is not detected.

The Java applet initiates an HTTP request from the remote user client to the SSL VPN gateway. The name and port number of the internal e-mail server is included in the HTTP request (POST or CONNECT). The SSL VPN gateway creates a TCP connection to that internal e-mail server and port.

The Java applet starts a new SSL connection for every client connection.

You should observe the following restrictions when using thin-client mode:

  • The remote user must allow the Java applet to download and install.
  • You cannot use thin-client mode for applications such as FTP, where the ports are negotiated dynamically. You can use TCP port forwarding only with static ports.

Note


There is a known compatibility issue with the encryption type and Java. If the Java port-forwarding applet does not download properly and the configuration line ssl encryption 3des-sha1 aes-sha1 is present, you should remove the line from the WebVPN gateway subconfiguration.
Options for Configuring HTTP Proxy and the Portal Page

Effective with Cisco IOS Release 12.4(11)T, administrators have more options for configuring the HTTP proxy and the portal page. If HTTP proxy is enabled, the Java applet acts as the proxy for the browser of the user, thereby connecting the client workstation with the gateway. The home page of the user (as defined by the user group) is opened automatically or, if configured by the administrator, the user is directed to a new website.

HTTP proxy supports both HTTP and HTTPS.

Benefits of Configuring HTTP Proxy

HTTP supports all client-side web technologies (including HTML, Cascading Style Sheets [CSS], JavaScript, VBScript, ActiveX, Java, and flash), HTTP Digest authentication, and client certificate authentication. Remote users can use their own bookmarks, and there is no limit on cookies. Because there is no mangling involved and the client can cache the objects, performance is much improved over previous options for configuring the HTTP proxy and portal page.

Illustrations of Port Forwarding with and Without an HTTP Proxy Configuration

The figure below illustrates TCP port forwarding without HTTP proxy configured.

Figure 3 TCP Port Forwarding Without HTTP Proxy Configured


In the figure above, the following steps occur:

  1. User downloads the proxy applet.
  2. Applet updates the registry to add HTTP as a Remote Procedure Call (RPC) transport.
  3. Applet examines the registry to determine the exchange (and local catalog) server and create server entries that refer to those servers.
  4. Applet opens local port 80 and listens for connections.
  5. User starts Outlook, and Outlook connects to 10.0.0.254:80.
  6. Applet opens a connection to the secure gateway and delivers the requests from Outlook.
  7. Secure gateway examines the requests to determine the endpoint exchange server.
  8. Data flows from Outlook, through the applet and the secure gateway, to the exchange server.
  9. User terminates Outlook.
  10. User closes the applet. Before closing, the applet undoes configuration Steps 3 and 4.

The figure below illustrates TCP port forwarding when HTTP proxy is configured.

Figure 4 HTTP Proxy


In the figure above, the following steps occur:

  1. Proxy applet is downloaded automatically.
  2. Applet saves the original proxy configuration of the browser.
  3. Applet updates the proxy configuration of the browser to be the local loopback address with an available local port (by default, port 8080).
  4. Applet opens the available local port and listens for connections.
  5. Applet, if so configured, opens the home page of the user, or the user browses to a new website.
  6. Applet accepts and looks at the HTTP or HTTPS request to determine the destination web server.
  7. Applet opens a connection to the secure gateway and delivers the requests from the browser.
  8. Secure gateway examines the requests to determine the endpoint web server.
  9. Data flows from the browser, through the applet and the secure gateway, to the web server.
  10. User closes applet. Before closing, the applet undoes configuration Steps 2 and 3.

Note


HTTP proxy can also be enabled on an authentication, authorization, and accounting (AAA) server. See the table SSL VPN RADIUS Attribute-Value Pairs in the Configuring RADIUS Attribute Support for SSL VPN section (port-forward-http-proxy and port-forward-http-proxy-url attributes).

Tunnel Mode

In a typical clientless remote access scenario, remote users establish an SSL tunnel to move data to and from the internal networks at the application layer (for example, web and e-mail). In tunnel mode, remote users use an SSL tunnel to move data at the network (IP) layer. Therefore, tunnel mode supports most IP-based applications. Tunnel mode supports many popular corporate applications (for example, Microsoft Outlook, Microsoft Exchange, Lotus Notes E-mail, and Telnet).

The tunnel connection is determined by the group policy configuration. The Cisco AnyConnect VPN Client is downloaded and installed on the remote user PC, and the tunnel connection is established when the remote user logs into the SSL VPN gateway.

By default, the Cisco AnyConnect VPN Client is removed from the client PC after the connection is closed. However, you have the option to keep the Cisco AnyConnect VPN Client installed on the client PC.

SSL VPN Features

Access Control Enhancements

Effective with Cisco IOS Release 12.4(20)T, administrators can configure automatic authentication and authorization for users. Users provide their usernames and passwords via the gateway page URL and do not have to reenter their usernames and passwords from the login page. Authorization is enhanced to support more generic authorization, including local authorization. In previous releases, only RADIUS authorization was supported.

For information about configuring this feature, see the "Configuring Automatic Authentication and Authorization" section.

SSL VPN Client-Side Certificate-Based Authentication

This feature enables SSL VPN to authenticate clients based on the client's AAA username and password and also supports WebVPN gateway authentication of clients using AAA certificates.

SSL VPN Client-Side Certificate-Based Authentication feature includes the following features:

Certificate-Only Authentication and Authorization Mode

Certificate-only authorization requires the user to provide a authentication, authorization, and accounting (AAA) authentication certificate as part of the WebVPN request, but does not require the username and password for authorization. The user requests WebVPN access with the AAA authentication certificate from the WebVPN gateway. The WebVPN gateway validates the identity of the client using the AAA authentication certificate presented to it. The WebVPN extracts the username from the AAA authentication certificate presented to it and uses it as the username in the AAA request. AAA authentication and AAA authorization are then completed with a hard-coded password. To configure certificate-only authorization use the authentication certificate command.

Users also need to configure public key infrastructure (PKI) AAA authorization using the entire subject name to retrieve the user name from the subject name in the certificate and use it for authorization. When using PKI AAA functionality, users sometimes have attribute-value (AV) pairs that are different from those of every other user. As a result, a unique username is required for each user. The PKI AAA authorization using the entire subject name provides users with the ability to query the AAA server using the entire subject name from the certificate as a unique AAA username.

Users should ensure that the AAA username being used by the device is the same as the username on the AAA server. Users can use the debug crypto pki transactions command to see which username is being used by the device.

Two-Factor Authentication and Authorization Mode

Two-factor authorization requires the user to request WebVPN access and present a AAA authentication certificate. The AAA authentication certificate is validated and the client's identity is verified. The WebVPN gateway then presents the login page to the user. The user enters their username and password and WebVPN sends AAA authentication and AAA authorization requests to the AAA server. The AAA authentication list and the AAA authorization lists configured on the server are then used for authentication and authorization. To configure two-factor authentication and authorization mode use the authentication certificate aaa command.


Note


If the username-prefill command is configured, the username textbox on the login page will be disabled. The user will be asked only for their password on the login page.
Identification of WebVPN Context at Runtime Using Certificate Map Match Rules

Certificate map match rules are used by SSL VPN to identify the WebVPN context at runtime. The WebVPN context is required for AAA authentication and authorization mode and trustpoint configuration. When the user does not provide the WebVPN context, the identification of the WebVPN context at runtime is possible using certificate map matching by matching the certificate presented by the client with the certificate map match rules. To configure certificate map matching in WebVPN use the match-certificate command.

Support for AnyConnect Client to Implement Certificate Matching Based on Client Profile Attributes

Cisco AnyConnect client has certificate match functionality allowing it to select a suitable certificate while initiating tunnel connection with SSL VPN. In the case of standalone mode, the certificate selection is made based on the certificate match. When selecting a certificate, Cisco AnyConnect client can select the appropriate certificate based on the AnyConnect client profile attributes. This requires SSL VPN to support AnyConnect client profiles. The profile file is imported after modification by the administrator using the svc profile command. To create an AnyConnect client profile use the template that appears after installing Cisco AnyConnect in this location: \Documents and Settings\All Users\Application Data\Cisco\ CiscoAnyConnectVPNClient\Profile\AnyConnectProfile.tmpl.

The following are the certificate match types available with Cisco AnyConnect client:

Certificate Key Usage Matching

Certificate key usage matching offers a set of constraints based on the broad types of operations that can be performed with a given certificate.

Extended Certificate Key Usage Matching

This matching allows an administrator to limit the certificates that can be used by the client based on the Extended Key Usage fields.

Certificate Distinguished Name Mapping

This certificate matching capability allows an administrator to limit the certificates that can be used by the client to those matching the specified criteria and criteria match conditions. This includes the ability to specify that a certificate must or must not have a specified string and also if wild carding for the string should be allowed.

AnyConnect Client Support

Effective with Cisco IOS Release 12.4(20)T, AnyConnect Client support is added for several client-side platforms, such as Microsoft Windows, Apple-Mac, and Linux. The ability to install AnyConnect in a standalone mode is also added. In addition, the Release 12.4(20)T allows you to install multiple AnyConnect VPN client packages to a gateway. For information on configuring multiple packages, see the "Configuring the SSL VPN Gateway to Distribute CSD and Cisco AnyConnect VPN Client Package Files" section.

Application ACL Support

Effective with Cisco IOS Release 12.4(11)T, the Application ACL Support feature provides administrators with the flexibility to fine-tune access control at the application layer level, for example, on the basis of a URL.

For information about configuring this feature, see the "Configuring ACL Rules" section, and "Associating an ACL Attribute with a Policy Group" section.

Automatic Applet Download

Effective with Cisco IOS Release 12.4(9)T, administrators have the option of automatically downloading the port-forwarding Java applet. The Automatic Applet Download feature must be configured on a group policy basis.


Note


Users still have to allow the Java applet to be downloaded. The dialog box appears, asking for permission.

To configure the automatic download, see the "Configuring an SSL VPN Policy Group" section.

Backend HTTP Proxy

The Backend HTTP Proxy feature, added in Cisco IOS Release 12.4(20)T, allows administrators to route user requests through a backend HTTP proxy, providing more flexibility and control than routing requests through internal web servers. This feature adds the following new AAA attributes:

http-proxy-server
http-proxy-server-port

For information about configuring this feature, see the "Configuring a Backend HTTP Proxy" section.

Front-Door VRF Support

Effective with Cisco IOS Release 12.4(15)T, front-door virtual routing and forwarding (FVRF) support, coupled with the already supported internal virtual routing and forwarding (IVRF), provides for increased security. The feature allows the SSL VPN gateway to be fully integrated into a Multiprotocol Label Switching (MPLS) or non-MPLS network (wherever the VRFs are deployed). The virtual gateway can be placed into a VRF that is separate from the Internet to avoid internal MPLS and IP network exposure. This placement reduces the vulnerability of the router by separating the Internet routes or the global routing table. Clients can now reach the gateway by way of the FVRF, which can be separate from the global VRF. The backend, or IVRF, functionality remains the same.

This FVRF feature provides for overlapping IP addresses.

The figure below is a scenario in which FVRF has been applied.

Figure 5 Scenario in Which FVRF Has Been Applied


To configure FVRF, see the "Configuring FVRF" section.

Full-Tunnel Cisco Express Forwarding Support

Effective with Cisco IOS Release 12.4(20)T, Full-Tunnel Cisco Express Forwarding support is added for better throughput performance than in earlier releases. This feature is enabled by default. To turn off full-tunnel Cisco Express Forwarding support, use the no webvpn cef command.


Note


To take full advantage of Cisco Express Forwarding support, the hardware crypto engine is required.

For sample output showing Cisco Express Forwarding-processed packets, see the Example Cisco Express Forwarding-Processed Packets.

Network Address Translation (NAT) configuration is sometimes used to forward TCP port 443 traffic destined to the WAN interface of a router through an internal webserver.

There are two methods of implementing Cisco IOS SSL VPN on a preexisting NAT configuration. The Cisco-recommended method is to use the WebVPN gateway IP address as the secondary address on the WAN interface. This method helps improve the WebVPN throughput performance. The following is a sample configuration of the recommended method on Cisco IOS SSL VPN:

interface GigabitEthernet 0/0
  ip address 10.1.1.1 255.255.255.0
  ip address 10.1.1.2 255.255.255.0 secondary !
webvpn gateway ssl_vpn
  ip address 10.1.1.2 port 443

In the second method the WebVPN gateway uses a private IP address configured on a loopback interface and performs a NAT operation to convert the private IP address to a publically routable address. The following configuration is not supported on Cisco IOS SSL VPN because this configuration causes packets to become process-switched instead of being Cisco Express Forwarding-switched:

interface Loopback 10
  ip address 192.0.2.1 255.255.255.0
!
interface GigabitEthernet 0/0
  description WAN interface
  ip address 10.1.1.1 255.0.0.0
!
ip nat inside source static 192.0.2.1 10.1.1.2 !
webvpn gateway ssl_vpn
  ip address 192.0.2.1 port 443

GUI Enhancements

In Cisco IOS Release 12.4(15)T, ergonomic improvements are made to the GUI of the Cisco IOS SSL VPN gateway. The improved customization of the user interface provides for greater flexibility and the ability to tailor portal pages for individualized views. Enhancements are made to the following web screens:

Login Screen

The figure below is an example of a typical login screen.

Figure 6 WebVPN Service Login Screen


Banner

The banner is a small popup box that appears before the portal page displays and after a user is logged in.

The message in the popup box is configured using the banner command.

Figure 7 Banner


Customization of a Login Page

Login screens can be customized by an administrator. The following figure shows the fields that can be customized.

For information about setting various elements of the login page, see also Cisco IOS Security Command Reference, Release 12.4T for the color, logo, login-message, login-photo, secondary-color, text-color, title, title-color, and text-color commands.

Figure 8 Login Page with Callouts of the Fields that can be Customized


Portal Page

The portal page (see the figure below) is the main page for the SSL VPN functionality. You can customize this page to contain the following:

  • Custom logo (the default is the Cisco bridge logo)
  • Custom title (the default is "WebVPN Services")
  • Custom banner (the default is an empty string)
  • Custom colors (the default is a combination of white and greens)
  • List of web server links (customizable)

Note


The Bookmark links are listed under the Personal folder, and the server links are listed under Network File in the figure below.
  • URL entry box (may be present or can be hidden using the hide-url-bar command)
  • Thin Client link (may or may not be present)

Note


The Application Access box allows you to download and install the Tunnel Connection and Thin Client Application.
  • Links for Help, Home (that is, the portal page), and Logout

Items that you have not configured are not displayed on the portal page.


Note


E-mail access is supported by thin-client mode, which is downloaded using the Thin Client link.

The figure below is an example of a WebVPN portal page.

Figure 9 WebVPN Portal Page



Note


Time to redirect to the home page is displayed on the WebVPN portal page if you have configured the home page redirect time using the webvpn-homepage command. See the Cisco IOS Security Command Reference for information about the webvpn-homepage command. You can click the "Click here to stop homepage redirection" link to stop redirection.
Customization of a Portal Page

Portal pages can be customized by an administrator. The following figure shows various fields, including the fields that can be customized by an administrator. The fields that can be customized by an administrator are as follows:

  • Title
  • Logo
  • Secondary color
  • Administrator-defined bookmarks
  • Color
Figure 10 Portal Page with Callouts of Various Fields, Including Those That Can Be customized


The table below provides information about various fields on the portal page. For information about setting elements such as color or titles, see command information in the Cisco IOS Security Command Reference, Release 12.4T for the color, functions, hide-url-bar, logo, port-forward, title, title-color, secondary-color, secondary-text-color, and url-list commands.

Table 2 Information About Fields on the Portal Page

Field

Description

User-level bookmark add icon

When a user selects this icon, a dialog box is added so that a new bookmark can be added to the Personal folder.

Network File location bar

Allows a user to enter the file server here. The functions file-access and functions file-entry commands must be configured for the input box to display.

Header

Shares the same color value as the title.

Last login

Time stamp of the last login.

Browse network

Allows a user to browse the file network. The functions file-access and functions file-browse commands must be configured for the icon to appear.

Tunnel Connection

Allows a user to choose when to start the tunnel connection by configuring the functions svc-enabled command.

Port forwarding

Downloads the applet and starts port forwarding.

User-level bookmark edit icon

Allows a user to edit or delete an existing bookmark.

User-level bookmarks

Allows a user to add a bookmark by using the plus icon

on the bookmark panel or toolbar. See the document "SSL VPN Remote User Guide" for information about the toolbar.

A new window displays when the link is clicked.

Administrator-defined bookmarks

Does not allow a user to edit an administrator-defined URL lists.

URL address bar

A new window displays when a user selects Go.

Internationalization

The Internationalization feature provides multilanguage support for messages initiated by the headend for SSL VPN clients, such as Cisco Secure Desktop (CSD) and SSL VPN Client (SVC). With the Internationalization feature, administrators can import their own attribute files in an XML format so that other languages can be imported using an editor that supports multilanguages.

The figure below shows a portal page in English. Users can select any language you have imported for certain SSL VPN web pages (login message, title page, and URL lists).

Figure 11 Portal Page in English


The figure below shows that an administrator has imported files in Japanese; a user has selected Japanese as the language for certain SSL VPN web pages (login message, title, and URL lists).

Figure 12 Portal Page in Japanese


For information about configuring this feature, see the "Configuring Internationalization" section. For examples relating to this feature, see the "Examples Internationalization" section.

Max-User Limit Message

A "Max user limit reached" message displays when a user logs in to a Web VPN context that has already reached the maximum users limit.

Netegrity Cookie-Based Single SignOn Support

The Netegrity SiteMinder product provides a Single SignOn feature that allows a user to log in a single time for various web applications. In this feature, a cookie is set in your browser for the first time when you are prompted to log in so that only a one-time login is required to access various web applications.

Effective with Cisco IOS Release 12.4(11)T, Netegrity cookie-based SSO is integrated with SSL VPN. It allows administrators to configure an SSO server that sets a SiteMinder cookie in a user's browser when the user initially logs in. This cookie is validated by a SiteMinder agent on subsequent user requests to resources that are protected by a SiteMinder realm. The agent decrypts the cookie and verifies user authentication.

For information about configuring SSO Netegrity Cookie Support and associating it with a policy group using the CLI, see the "Configuring SSO Netegrity Cookie Support for a Virtual Context" section and "Associating an SSO Server with a Policy Group" section.

The following example shows that an SSO server can also be associated with a policy group using RADIUS attributes:

webvpn:sso-server-name=server1

For a list of RADIUS attribute-value (AV) pairs that support SSL VPN, see the "Configuring RADIUS Attribute Support for SSL VPN" section.

NTLM Authentication

NT LAN Manager (NTLM) is supported for SSL VPN effective with Cisco IOS Release 12.4(9)T. The feature is configured by default.

RADIUS Accounting

Effective with Cisco IOS Release 12.4(9)T, this feature provides for RADIUS accounting of SSL VPN user sessions.

For information about configuring SSL VPN RADIUS accounting for SSL VPN user sessions, see the "Configuring RADIUS Accounting for SSL VPN User Sessions" section.

For more information about configuring RADIUS accounting, see the "Configuring RADIUS" chapter in the Cisco IOS Security Configuration Guide: Securing User Services.

For a list of RADIUS AV pairs that support SSL VPN, see the "Configuring RADIUS Attribute Support for SSL VPN" section.

Stateless High Availability with Hot Standby Router Protocol

Hot Standby Router Protocol (HSRP) provides high network availability by routing IP traffic from hosts on Ethernet networks without having to rely on the availability of any single router. HSRP is particularly useful for hosts that do not support a router discovery protocol, such as ICMP Router Discovery Protocol (IRDP), and that do not have the functionality to switch to a new router when their selected router reloads or loses power. Without this functionality, a router that loses its default gateway because of a router failure is unable to communicate with the network.

HSRP is configurable on LAN interfaces using standby CLI. It is possible to use the standby IP address from an interface as the local IPsec identity, or local tunnel endpoint.

You can use the standby IP address as the SSL VPN gateway address to apply failover to VPN routers by using HSRP. Remote SSL VPN users connect to the local VPN gateway using the standby address that belongs to the active device in the HSRP group. In the event of a failover, the standby device takes over ownership of the standby IP address and begins to service remote VPN users.

Using the Stateless High Availability with Hot Standby Router Protocol feature, the remote user has to be aware of only the HSRP standby address instead of a list of gateway addresses.

The figure below shows the enhanced HSRP functionality topology. Traffic is serviced by the active Router P, the active device in the standby group. In the event of failover, traffic is diverted to Router S, the original standby device. Router S assumes the role of the new active router and takes ownership of the standby IP address.

Figure 13 Stateless High Availability with HSRP for SSL VPN


For information about configuring Stateless High Availability with HSRP, see the "Configuring Stateless High Availability with HSRP for SSL VPN" on section .


Note


In the case of a failover, HSRP does not facilitate SSL VPN state information transfer between VPN gateways. Without this state transfer, existing SSL VPN sessions with the remote users will be deleted, requiring users to reauthenticate and establish SSL VPN sessions with the new active gateway.

TCP Port Forwarding and Thin Client


Note


The TCP Port Forwarding and Thin Client feature requires the Java Runtime Environment (JRE) version 1.4 or later releases to properly support SSL connections.

Note


Because this feature requires installing JRE and configuring the local clients, and because doing so requires administrator permissions on the local system, it is unlikely that remote users will be able to use applications when they connect from public remote systems.

When the remote user clicks the Start button of the Thin Client Application (under "Application Access), a new window is displayed. This window initiates the downloading of a port-forwarding applet. Another window is then displayed. This window asks the remote user to verify the certificate with which this applet is signed. When the remote user accepts the certificate, the applet starts running, and port-forwarding entries are displayed (see the figure below ). The number of active connections and bytes that are sent and received is also listed on this window.


Note


When remote users launch Thin Client, their system may display a dialog box regarding digital certificates, and this dialog box may appear behind other browser windows. If the remote user connection hangs, tell the remote user to minimize the browser windows to check for this dialog box.

You should have configured IP addresses, Domain Name System (DNS) names, and port numbers for the e-mail servers. The remote user can then launch the e-mail client, which is configured to contact the e-mail servers and send and receive e-mails. POP3, IMAP, and SMTP protocols are supported.

The window attempts to close automatically if the remote user is logged out using JavaScript. If the session terminated and a new port forwarding connection is established, the applet displays an error message.

Figure 14 TCP Port Forwarding Page



Caution


Users should always close the Thin Client window when finished using applications by clicking the close icon. Failure to quit the window properly can cause Thin Client or the applications to be disabled. See the "Application Access--Recovering from Hosts File Errors" section in the document SSL VPN Remote User Guide.


The table below lists remote system requirements for Thin Client.

Table 3 SSL VPN Remote System Thin-Client Requirements

Remote User System Requirements

Specifications or Use Suggestions

Client applications installed.

-

Cookies enabled on browser.

-

Administrator privileges.

You must be the local administrator on your PC.

Sun Microsystems JRE version 1.4 or later installed.

SSL VPN automatically checks for JRE whenever the remote user starts Thin Client. If it is necessary to install JRE, a popup window displays directing remote users to a site where it is available.

Client applications configured, if necessary.

Note    The Microsoft Outlook client does not require this configuration step.

To configure the client application, use the locally mapped IP address and port number of the server. To find this information, do the following:

  • Start SSL VPN on the remote system and click the Thin-Client link on the SSL VPN home page. The Thin-Client window is displayed.
  • In the Name column, find the name of the server that you want to use, and then identify its corresponding client IP address and port number (in the Local column).
  • Use this IP address and port number to configure the client application. The configuration steps vary for each client application.

Windows XP SP2 patch.

If you are running Windows XP SP2, you must install a patch from Microsoft that is available at the following address:

http://support.microsoft.com/?kbid=884020

This is a known Microsoft issue.

URL Obfuscation

The URL Obfuscation feature provides administrators with the ability to obfuscate, or mask, sensitive portions of an enterprise URL, such as IP addresses, hostnames, or part numbers. For example, if URL masking is configured for a user, the URL in the address bar could have the port and hostname portion obfuscated, as in this example:

https://slvpn-gateway.examplecompany.com/http/cF9HxnBjRmSFEzBWpDtfXfigzL559MQo51Qj/cgi-bin/submit.p

For information about configuring this feature, see the "Associating an SSO Server with a Policy Group" section.

URL Rewrite Splitter

Effective with Cisco IOS Release 12.4(20)T, the URL Rewrite Splitter feature allows administrators to mangle selective URLs. Mangling is a CPU-intensive and time-consuming process, so mangling only selective URLs can result in a savings of memory and time.

For information about configuring this feature, see the "Configuring a URL Rewrite Splitter" section.

User-Level Bookmarking

Effective with Cisco IOS Release 12.4(15)T, users can bookmark URLs while connected through an SSL VPN tunnel. Users can access the bookmarked URLs by clicking the URLs.

User-level bookmarking is turned by default. There is no way to turn it off. To set the storage location, administrators can use the user-profile location command. If the user-profile location command is not configured, the location flash:/webvpn/{context name}/ is used.

Virtual Templates

A virtual template enables SSL VPN to interoperate with IP features such as Network Address Translation (NAT), firewall, and policy-based routing.

For information about configuring this feature, see Configuring a_Virtual_Template section.

License String Support for the 7900 VPN Client

The Cisco IOS SSL VPN accepts license strings from Cisco IP Phones. Cisco IOS VPN concentrators support the VPN license type linksys-phone in order to support the Galactica VPN client on 79x 2 and 79x 5 phones.

In the case of a transformer platform, response to the license message (linksys-phone) will succeed if the license requirements are met. However, an Integrated Services Routers (ISR) router must always respond with a success message so that the Galactica VPN client can attempt to establish a VPN connection.

SSL VPN DVTI Support

The SSL VPN DVTI Support feature adds Dynamic Virtual Tunnel Interface (DVTI) support to the Secure Socket Layer Virtual Private Network (SSL VPN) and hence enables seamless interoperability with IP features such as Firewall, Network Address Translation (NAT), access Control Lists (ACLs), and Virtual Routing and Forwarding (VRF). This feature also provides DVTI support, which allows IP feature configuration on a per-tunnel basis.

SSL VPN provides three modes to access a VPN: clientless, thin client, and full tunnel. The full tunnel mode uses an internal virtual interface to route the traffic to and from the SSL VPN tunnel. Before the SSL VPN DVTI Support feature was introduced, the virtual interface was created during the SSL VPN virtual interface configuration and users were not allowed to apply IP features to the SSL VPN traffic.

The SSL VPN DVTI Support feature uses a virtual template infrastructure to provide DVTI support for SSL VPN. IP features are configured in a virtual template that is associated with the SSL VPN or WebVPN context. The IP features configured in the virtual template are used to create a virtual access interface that is internally used to tunnel SSL VPN traffic. Virtual templates in a WebVPN context are applied in two ways: per-context and per-tunnel.


Note


You can configure any IP feature with SSL VPN. However, in the Cisco IOS Release 15.1(1)T, interoperability has been tested only with the firewall, NAT, ACL, policy-based routing (PBR), and VRF IP features.

The SSL VPN DVTI Support feature contains the following:

Prerequisites for SSL VPN DVTI Support
  • You must have the IP features configured in a virtual template. See the "Configuring a Virtual Template" section for information on configuring a virtual template.
  • SSL VPN must be able to fetch configurations from the AAA server.
  • The SSL VPN gateway and context configurations must be enabled and operational.
  • If VRF is needed, configure it before creating the virtual template.
Restrictions for SSL VPN DVTI Support
  • In order for a virtual template to work with SSL VPN, the ip unnumbered command must be configured on the virtual template.
Virtual Template Infrastructure

A generic interface template service is required with features such as stackability, Virtual Private Dialup Network (VPDN), Multilink PPP (MLP), and virtual profiles. Virtual template interface service delivers a generic interface template service. The virtual template interface, command buffer, and virtual access interface functions enables you to populate a virtual-access interface using a pre-defined configuration that is stored in a virtual template interface and security servers such as TACACS+ and RADIUS.

For example, in stackability, a virtual template interface is assigned to a stack group. Whenever a stack member needs a virtual interface, the virtual template interface service is called by a member to obtain a virtual access interface cloned with the same configuration as the configuration of the assigned virtual template interface.

In a virtual profile, the per-user configuration can be stored in a security server. That is, when the user dials in, the desired configuration can be cloned into the virtual access interface associated with the user. The virtual template service provides an application programming interface (API) for a virtual profile to clone a buffer of commands to a virtual access interface. The virtual profile does the actual interaction with the security server.


Note


If you do not configure a virtual template, then the default virtual template (VT0) will be used for cloning the virtual access interface.

SSL VPN Phase-4 Features

The SSL VPN Phase-4 Features feature provides the following enhancements to the Cisco IOS Secure Sockets Layer Virtual Private Network (SSL VPN):

  • ACL support for split tunneling
  • IP mask for IP pool address assignment
  • Undoing the renaming of AnyConnect or SSL VPN Client (SVC) Full Tunnel Cisco package during installation on a Cisco IOS router
  • Adding per-user SSL VPN session statistics
  • "Start before logon" option for the Cisco IOS SSL VPN headend

The SSL VPN Phase-4 features contains the following:

Prerequisites for SSL VPN Phase-4 Features

You must use a valid K9 image to configure the SSL VPN Phase-4 Features.

Full Tunnel Package

When you install the AnyConnect or SVC full tunnel package using the crypto vpn command on the Cisco IOS headend, the package name gets renamed to svc_pkg_<number>. This renaming omits package information and Base Station Ethernet (BSE) operating system information, and thus makes you difficult to remove or uninstall the package. This functionality was modified in Cisco IOS Release 15.1(1)T to retain the name during installation of the package.

The limit on the filename size on the Cisco IOS file system (IFS) is 120 bytes. Unless the package name is greater than this limit, the package name does not change. If the filename exceeds this limit, then the installation fails. The following error message is displayed on the router console:

Error: Package name exceeds 120 characters
SSL VPN per-User Statistics

Per-user statistics functionality provides an option to filter the cumulative statistics on a per-user basis for the Cisco IOS SSL VPN sessions. Use the show webvpn session user command to enable this functionality. This command is applicable only for user session statistics and tunnel statistics. See Cisco Cisco IOS Security Command Reference for more information on the show webvpn session command.

DTLS Support for IOS SSL VPN

The DTLS Support for IOS SSL VPN feature enables DTLS as a transport protocol for the traffic tunneled through SSL VPN.

An AnyConnect client with a Transport Layer Security (TLS) tunnel can face problems for real-time traffic and the traffic that is not sensitive to data loss, such as VoIP. This happens because of the delay introduced by the TCP channel (AnyConnect client uses TLS over TCP channel). Also, when the TCP sessions are channeled over the TLS tunnel we have TCP in TCP. Here both the TCPs try to control the flow and achieve in-sequence reliable delivery. This causes slow down of the application and also increases the network bandwidth utilization. DTLS solves this problem by hosting TLS over UDP after making the necessary changes to TLS.

The DTLS Support for IOS SSL VPN feature is enabled by default on the Cisco IOS SSL VPN. You can use the no svc dtls command in the WebVPN group policy configuration mode to disable the DTLS support on the SSL VPN.

Prerequisites for DTLS Support for IOS SSL VPN

You must use a valid K9 image to have the DTLS Support for IOS SSL VPN feature.

Restrictions for DTLS Support for IOS SSL VPN
  • Cisco IOS gateway supports the DTLS Support for IOS SSL VPN feature only with an AnyConnect clients.
  • The DTLS Support for IOS SSL VPN feature is supported on AnyConnect clients with version 2.x.
  • The DTLS Support for IOS SSL VPN feature is not supported on SSL VPN Client (SVC) with version 1.x.

Cisco AnyConnect VPN Client Full Tunnel Support

Remote Client Software from the SSL VPN Gateway

The Cisco AnyConnect VPN Client software package is pushed from the SSL VPN gateway to remote clients when support is needed. The remote user (PC or device) must have either the Java Runtime Environment for Windows (version 1.4 later), or the browser must support or be configured to permit Active X controls. In either scenario, the remote user must have local administrative privileges.

Address Pool

The address pool is first defined with the ip local pool command in global configuration mode. The standard configuration assumes that the IP addresses in the pool are reachable from a directly connected network.

Address Pools for Nondirectly Connected Networks

If you need to configure an address pool for IP addresses from a network that is not directly connected, perform the following steps:

  1. Create a local loopback interface and configure it with an IP address and subnet mask from the address pool.
  2. Configure the address pool with the ip local pool command. The range of addresses must fall under the subnet mask configured in Step 1.
  3. Set up the route. If you are using the Routing Information Protocol (RIP), configure the router rip command and then the network command, as usual, to specify a list of networks for the RIP process. If you are using the Open Shortest Path First (OSPF) protocol, configure the ip ospf network point-to-point command in the loopback interface. As a third choice (instead of using the RIP or OSPF protocol), you can set up static routes to the network.
  4. Configure the svc address-pool command with the name configured in Step 2.
Manual Entry to the IP Forwarding Table

If the SSL VPN software client is unable to update the IP forwarding table on the PC of the remote user, the following error message will be displayed in the router console or syslog:

Error : SSL VPN client was unable to Modify the IP forwarding table ...... 

This error can occur if the remote client does not have a default route. You can work around this error by performing the following steps:

  1. Open a command prompt (DOS shell) on the remote client.
  2. Enter the route print command.
  3. If a default route is not displayed in the output, enter the route command followed by the add and mask keywords. Include the default gateway IP address at the end of the route statement. See the following example:
C:\>route ADD 0.0.0.0 MASK 0.0.0.0 10.1.1.1 

Other SSL VPN Features

The following table lists the requirements for various SSL VPN features.

Table 4 SSL VPN Remote User System Requirements

Task

Remote User System Requirements

Additional Information

Web Browsing

Usernames and passwords for protected websites

Users should log out on SSL VPN sessions when they are finished.

The look and feel of web browsing with SSL VPN might be different from what users are accustomed to. For example, when they are using SSL VPN, the following should be noted:

  • The SSL VPN title bar appears above each web page.
  • Websites can be accessed as follows:
    • Entering the URL in the Enter Web Address field on the SSL VPN home page
    • Clicking a preconfigured website link on the SSL VPN home page
    • Clicking a link on a webpage accessed by one of the previous two methods

Also, depending on how a particular account was configured, the following might have occurred:

  • Some websites are blocked.
  • Only the websites that appear as links on the SSL VPN home page are available.

Network Browsing and File Management

File permissions configured for shared remote access

Server name and passwords are necessary for protected file servers

Domain, workgroup, and server names where folders and files reside

Only shared folders and files are accessible through SSL VPN.

A user might not be familiar with how to locate files through the network of an organization.

Note    You should not interrupt the Copy File to Server operation or navigate to a different window while the copying is in progress. Interrupting this operation can cause an incomplete file to be saved on the server.

Using e-mail:Thin Client

Same requirements as for Thin Client (see the "TCP Port Forwarding and Thin Client" ).

Other Mail Clients

Note    If you use an IMAP client and lose the e-mail server connection or you are unable to make a new connection, you should close the IMAP application and restart SSL VPN.

To use e-mail, users must start Thin Client from the SSL VPN home page. The e-mail client is then available for use.

Microsoft Outlook Express versions 5.5 and 6.0 have been tested.

SSL VPN should support other SMTPS, POP3S, or IMAP4S e-mail programs, such as Netscape Mail, Lotus Notes, and Eudora, but they have not been verified.

Using e-mail: Web Access

Web-based e-mail product installed

Supported products are as follows:

  • OWA 5.5, 2000, and 2003

Netscape, Mozilla, and Internet Explorer are supported with OWA 5.5 and 2000.

Internet Explorer 6.0 or a later version is required with OWA 2003. Netscape and Mozilla are supported with OWA 2003.

  • Lotus Notes

Operating system support:

Note    Later versions of the following browsers are also supported.
  • Microsoft Windows 2000, Windows XP, or Windows Vista
  • Macintosh OS X 10.4.6
  • Linux (Redhat RHEL 3.0 +, FEDORA 5, or FEDORA 6)

SSL VPN-supported browser:

The following browsers have been verified for SSL VPN. Other browsers might not fully support SSL VPN features.

Note    Later versions of the following software are also supported.
  • Internet Explorer 6.0 or 7.0
  • Firefox 2.0 (Windows and Linux)
  • Safari 2.0.3

Other web-based e-mail products should also work, but they have not been verified.

Using the Cisco Tunnel Connection

--

To retrieve Tunnel Connection log messages using the Windows Event Viewer, go to Program Files > Administrative Tools > Event Viewer in Windows.

Using Secure Desktop Manager

A Secure Desktop Manager-supported browser

On Microsoft Windows:

  • Internet Explorer version 6.0 or 7.0
  • Netscape version 7.2

On Linux:

  • Netscape version 7.2

Using Cache Cleaner or Secure Desktop

A Cisco Secure Desktop-supported browser

Any browser supported for Secure Desktop Manager.

Platform Support

For information about platform support for the SSL VPN feature, see the Cisco IOS SSL VPN data sheet section.

How to Configure SSL VPN Services on a Router

Configuring an SSL VPN Gateway

The SSL VPN gateway acts as a proxy for connections to protected resources. Protected resources are accessed through an SSL-encrypted connection between the gateway and a web-enabled browser on a remote device, such as a personal computer. Entering the webvpn gateway command places the router in SSL VPN gateway configuration mode. The following configuration are accomplished in this task:

  • The gateway is configured with an IP address.
  • A port number is configured to carry HTTPS traffic (443 is default).
  • A hostname is configured for the gateway.
  • Crypto encryption and trust points are configured.
  • The gateway is configured to redirect HTTP traffic (port 80) over HTTPS.
  • The gateway is enabled.

Note


Security threats, as well as the cryptographic technologies to help protect against them, are constantly changing. For more information about the latest Cisco cryptographic recommendations, see the Next Generation Encryption (NGE) white paper.

The SSL VPN provides remote-access connectivity from almost any Internet-enabled location using only a web browser and its native SSL encryption. The ssl encryption command is configured to restrict the encryption algorithms that SSL uses in Cisco IOS software.


Note


There is a known compatibility issue with the encryption type and Java. If the Java port-forwarding applet does not download properly and the configuration line ssl encryption 3des-sha1 aes-sha1 is present, you should remove the line from the WebVPN gateway subconfiguration.

The configuration of the ssl trustpoint command is required only if you need to configure a specific certification authority (CA) certificate. A self-signed certificate is automatically generated when an SSL VPN gateway is put in service.

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    webvpn gateway name

4.    hostname name

5.    ip address number [port number] [standby name]

6.    http-redirect [port number]

7.    ssl encryption [aes-sha1] [3des-sha1] [rc4-md5]

8.    ssl trustpoint name

9.    inservice

10.   end


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
webvpn gateway name


Example:

Device(config)# webvpn gateway GW_1

 

Enters WebVPN gateway configuration mode to configure an SSL VPN gateway.

  • Only one gateway is configured in an SSL VPN-enabled network.
 
Step 4
hostname name


Example:

Device(config-webvpn-gateway)# hostname VPN_1

 

(Optional) Configures the hostname for an SSL VPN gateway.

 
Step 5
ip address number [port number] [standby name]


Example:

Device(config-webvpn-gateway)# ip address 10.1.1.1

 

(Optional) Configures a proxy IP address on an SSL VPN gateway.

 
Step 6
http-redirect [port number]


Example:

Device(config-webvpn-gateway)# http-redirect

 

(Optional) Configures HTTP traffic to be carried over HTTPS.

  • When this command is enabled, the SSL VPN gateway listens on port 80 and redirects HTTP traffic over port 443 or the port number specified with the port keyword.
 
Step 7
ssl encryption [aes-sha1] [3des-sha1] [rc4-md5]


Example:

Device(config-webvpn-gateway)# ssl encryption aes-sha-1

 

(Optional) Specifies the encryption algorithm that the SSL protocol uses for SSL VPN connections.

  • The ordering of the algorithms specifies the preference.
 
Step 8
ssl trustpoint name


Example:

Device(config-webvpn-gateway)# ssl trustpoint CA_CERT

 

(Optional if a self-signed certificate is to be used.) Configures the certificate trust point on an SSL VPN gateway.

 
Step 9
inservice


Example:

Device(config-webvpn-gateway)# inservice

 

(Optional) Enables an SSL VPN gateway.

  • A gateway cannot be enabled or put "in service" until a proxy IP address has been configured.
 
Step 10
end


Example:

Device(config-webvpn-gateway)# end

 

Exists the WebVPN gateway configuration mode and enters the privileged EXEC mode.

 

What to Do Next

SSL VPN context and policy group configurations must be configured before an SSL VPN gateway can be operationally deployed. Proceed to the "Configuring an SSL VPN Context" section to see information on SSL VPN context configuration.

Configuring a Generic SSL VPN Gateway

To configure a generic SSL VPN gateway, perform the following steps in privileged EXEC mode.


Note


The advantage of this configuration over the one in the configuration task in the "Configuring an SSL VPN Gateway" section on section is that basic commands and context can be configured quickly using just the webvpn enable command.
SUMMARY STEPS

1.    enable

2.    webvpn enable gateway-addr ip-address

3.    end


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
webvpn enable gateway-addr ip-address


Example:

Device# webvpn enable gateway-addr 10.1.1.1

 

Configures a generic SSL VPN gateway.

 
Step 3
end


Example:

Device(config-webvpn-gateway)# end

 

Exists the webvpn gateway configuration mode and enters the privileged EXEC mode.

 

Configuring an SSL VPN Context

The SSL VPN context defines the virtual configuration of the SSL VPN. Entering the webvpn context command places the router in SSL VPN configuration mode. The following configurations are accomplished in this task:

  • A gateway and domain is associated.
  • The AAA authentication method is specified.
  • A group policy is associated.
  • The remote user portal (web page) is customized.
  • A limit on the number users sessions is configured.
  • The context is enabled.

The ssl authenticate verify all command is enabled by default when a context configuration is created. The context cannot be removed from the router configuration while an SSL VPN gateway is in an enabled state (in service).

A virtual hostname is specified when multiple virtual hosts are mapped to the same IP address on the SSL VPN gateway (similar to the operation of a canonical domain name). The virtual hostname differentiates host requests on the gateway. The host header in the HTTP message is modified to direct traffic to the virtual host. The virtual hostname is configured with the gateway command in WebVPN context configuration mode.

Before You Begin

The SSL VPN gateway configuration has been completed.


SUMMARY STEPS

1.    enable

2.    configure terminal

3.    webvpn context name

4.    aaa authentication {domain name | list name}

5.    policy group name

6.    exit

7.    default-group-policy name

8.    exit

9.    gateway name [domain name | virtual-host name]

10.    inservice

11.    login-message [message-string]

12.    logo [file filename | none]

13.    max-users number

14.    secondary-color color

15.    secondary-text-color {black | white}

16.    title [title-string]

17.    title-color color

18.    svc platform {lin | mac | win} seq sequence-number

19.   end


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
webvpn context name


Example:

Device(config)# webvpn context context1

 

Enters WebVPN context configuration mode to configure the SSL VPN context.

Tip   

The context can be optionally named using the domain or virtual hostname. This is recommended as a best practice. It simplifies the management of multiple context configurations.

 
Step 4
aaa authentication {domain name | list name}


Example:

Device(config-webvpn-context)# aaa authentication domain SERVER_GROUP

 

(Optional) Specifies a list or method for SSL VPN remote-user authentication.

Tip   

If this command is not configured, the SSL VPN gateway will use global AAA parameters (if configured) for remote-user authentication.

 
Step 5
policy group name


Example:

Device(config-webvpn-context)# policy group ONE

 

(Optional) Creates a policy group within the SSL VPN context and enters WebVPN group policy configuration mode.

  • Used to define a policy that can be applied to the user.
 
Step 6
exit


Example:

Device(config-webvpn-group)# exit

 

(Optional) Exits WebVPN group policy configuration mode.

 
Step 7
default-group-policy name


Example:

Device(config-webvpn-context)# default-group-policy ONE

 

(Optional) Associates a group policy with an SSL VPN context configuration.

  • This command is configured to attach the policy group to the SSL VPN context when multiple group policies are defined under the context.
  • This policy will be used as default, unless a AAA server pushes an attribute that specifically requests another group policy.
 
Step 8
exit


Example:

Device(config-webvpn-context)# exit

 

(Optional) Exits WebVPN context configuration mode.

 
Step 9
gateway name [domain name | virtual-host name]


Example:

Device(config-webvpn-context)# gateway GW_1 domain cisco.com

 

(Optional) Associates an SSL VPN gateway with an SSL VPN context.

 
Step 10
inservice


Example:

Device(config-webvpn-gateway)# inservice

 

(Optional) Enables an SSL VPN context configuration.

  • The context is put "in service" by entering this command. However, the context is not operational until it is associated with an enabled SSL VPN gateway.
 
Step 11
login-message [message-string]


Example:

Device(config-webvpn-context)# login-message "Please enter your login credentials"

 

(Optional) Configures a message for the user login text box displayed on the login page.

 
Step 12
logo [file filename | none]


Example:

Device(config-webvpn-context)# logo file flash:/mylogo.gif

 

(Optional) Configures a custom logo to be displayed on the login and portal pages of an SSL VPN.

  • The source image file for the logo is a gif, jpg, or png file that is up to 255 characters in length (filename) and up to 100 KB in size.
  • The file is referenced from a local file system, such as flash memory. An error message will be displayed if the file is not referenced from a local file system.
  • No logo will be displayed if the image file is removed from the local file system.
 
Step 13
max-users number


Example:

Device(config-webvpn-context)# max-users 500

 

(Optional) Limits the number of connections to an SSL VPN that will be permitted.

 
Step 14
secondary-color color


Example:

Device(config-webvpn-context)# secondary-color darkseagreen

 

(Optional) Configures the color of the secondary title bars on the login and portal pages of an SSL VPN.

  • The value for the color argument is entered as a comma-separated red, green, blue (RGB) value, an HTML color value (beginning with a pound sign [#]), or the name of the color that is recognized in HTML (no spaces between words or characters). The value is limited to 32 characters. The value is parsed to ensure that it matches one of the following formats (using Perl regex notation):
    • \#/x{6}
    • \d{1,3},\d{1,3},\d{1,3} (and each number is from 1 to 255)
    • \w+
  • The default color is purple.
 
Step 15
secondary-text-color {black | white}


Example:

Device(config-webvpn-context)# secondary-text-color white

 

(Optional) Configures the color of the text on the secondary bars of an SSL VPN.

  • The color of the text on the secondary bars must be aligned with the color of the text on the title bar.
  • The default color is black.
 
Step 16
title [title-string]


Example:

Device(config-webvpn-context)# title "Secure Access: Unauthorized users prohibited"

 

(Optional) Configures the HTML title string that is shown in the browser title and on the title bar of an SSL VPN.

  • The optional form of the title command is entered to configure a custom text string. If this command is issued without entering a text string, a title will not be displayed in the browser window. If the no form of this command is used, the default title string "WebVPN Service" is displayed.
 
Step 17
title-color color


Example:

Device(config-webvpn-context)# title-color darkseagreen

 

(Optional) Specifies the color of the title bars on the login and portal pages of an SSL VPN.

  • The value for the color argument is entered as a comma-separated red, green, blue (RGB) value, an HTML color value (beginning with a pound sign [#]), or the name of the color that is recognized in HTML (no spaces between words or characters). The value is limited to 32 characters. The value is parsed to ensure that it matches one of the following formats (using Perl regex notation):
    • \#/x{6}
    • \d{1,3},\d{1,3},\d{1,3} (and each number is from 1 to 255)
    • \w+
  • The default color is purple.
 
Step 18
svc platform {lin | mac | win} seq sequence-number


Example:

Device(config-webvpn-context)# svc platform lin seq 1

 

(Optional) Configures the platform of an AnyConnect version per context.

  • If the svc platform command is not used, AnyConnect is configured in standalone mode.
  • The seq keyword assigns a priority number to an AnyConnect client in the same platform. The range of sequence-number argument is from 1 to 10.
 
Step 19
end


Example:

Device(config-webvpn-context)# end

 

Exists the WebVPN context configuration mode and enters the privileged EXEC mode.

 

What to Do Next

An SSL VPN policy group configuration must be defined before an SSL VPN gateway can be operationally deployed. Proceed to the Configuring_an_SSL_VPN_Policy_Group_1054618 section to see information on SSL VPN policy group configuration.

Configuring an SSL VPN Policy Group

The policy group is a container that defines the presentation of the portal and the permissions for resources that are configured for a group of remote users. Entering the policy group command places the router in WebVPN group policy configuration mode. After it is configured, the group policy is attached to the SSL VPN context configuration by configuring the default-group-policy command. The following tasks are accomplished in this configuration:

  • The presentation of the SSL VPN portal page is configured.
  • A NetBIOS server list is referenced.
  • A port-forwarding list is referenced.
  • The idle and session timers are configured.
  • A URL list is referenced.

Outlook Web Access (OWA) 2003 is supported by the SSL VPN gateway upon completion of this task. The Outlook Exchange Server must be reachable by the SSL VPN gateway via TCP/IP.

A URL list can be configured under the SSL VPN context configuration and then separately for each individual policy group configuration. Individual URL list configurations must have unique names.

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    webvpn context name

4.    policy group name

5.    banner string

6.    hide-url-bar

7.    nbns-list name

8.    port-forward name [auto-download[http-proxy [proxy-url homepage-url]] | http-proxy [proxy-url homepage-url] [auto-download]]

9.    timeout {idle seconds | session seconds}

10.    url-list name

11.    end


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
webvpn context name


Example:

Device(config)# webvpn context context1

 

Enters WebVPN context configuration mode to configure the SSL VPN context.

 
Step 4
policy group name


Example:

Device(config-webvpn-context)# policy group ONE

 

Enters WebVPN group policy configuration mode to configure a group policy.

 
Step 5
banner string


Example:

Device(config-webvpn-group)# banner "Login Successful"

 

(Optional) Configures a banner to be displayed after a successful login.

 
Step 6
hide-url-bar


Example:

Device(config-webvpn-group)# hide-url-bar

 

(Optional) Prevents the URL bar from being displayed on the SSL VPN portal page.

 
Step 7
nbns-list name


Example:

Device(config-webvpn-group)# nbns-list SERVER_LIST

 

(Optional) Attaches a NetBIOS Name Service (NBNS) server list to a policy group configuration.

  • The NBNS server list is first defined in SSL VPN NBNS list configuration mode.
 
Step 8
port-forward name [auto-download[http-proxy [proxy-url homepage-url]] | http-proxy [proxy-url homepage-url] [auto-download]]


Example:

Device(config-webvpn-group)# port-forward EMAIL auto-download http-proxy proxy-url "http://www.example.com"

 

(Optional) Attaches a port-forwarding list to a policy group configuration.

  • auto-download --(Optional) Allows for automatic download of the port-forwarding Java applet on the portal page of a website.
  • http-proxy --(Optional) Allows the Java applet to act as a proxy for the browser of the user.
  • proxy-url --(Optional) Page at this URL address opens as the portal (home) page of the user.
  • homepage-url --URL of the home page.
 
Step 9
timeout {idle seconds | session seconds}


Example:

Device(config-webvpn-group)# timeout idle 1800

 

(Optional) Configures the length of time that a remote user session can remain idle or the total length of time that the session can remain connected.

  • Upon expiration of either timer, the remote user connection is closed. The remote user must log in (reauthenticate) to access the SSL VPN.
 
Step 10
url-list name


Example:

Device(config-webvpn-group)# url-list ACCESS

 

(Optional) Attaches a URL list to policy group configuration.

 
Step 11
end


Example:

Device(config-webvpn-group)# end

 

Exists the WebVPN group configuration mode and enters the privileged EXEC mode.

 

What to Do Next

At the completion of this task, the SSL VPN gateway and context configurations are operational and enabled (in service), and the policy group has been defined. The SSL VPN gateway is operational for clientless remote access (HTTPS only). Proceed to the Configuring_Local_AAA_Authentication_for_SSL_VPN_User_Sessions section to see information about configuring AAA for remote-user connections.

Configuring Local AAA Authentication for SSL VPN User Sessions

The steps in this task show how to configure a local AAA database for remote-user authentication. AAA is configured in global configuration mode. In this task, the aaa authentication command is not configured under the SSL VPN context configuration. Omitting this command from the SSL VPN context configuration causes the SSL VPN gateway to use global authentication parameters by default.

Before You Begin

SSL VPN gateway and context configurations are enabled and operational.


SUMMARY STEPS

1.    enable

2.    configure terminal

3.    aaa new-model

4.    username name secret {0 user-secret | 5 secret-string | user-secret}

5.    aaa authentication login default local

6.    end


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
aaa new-model


Example:

Device(config)# aaa new-model

 

Enables the AAA access control model.

 
Step 4
username name secret {0 user-secret | 5 secret-string | user-secret}


Example:

Device(config)# username USER1 secret 0 PsW2143

 

Establishes a username-based authentication system.

  • Entering 0 configures the password as clear text. Entering 5 encrypts the password.
 
Step 5
aaa authentication login default local


Example:

Device(config)# aaa authentication login default local

 

Configures local AAA authentication.

 
Step 6
end


Example:

Device(config-webvpn-group)# end

 

Exists the WebVPN group configuration mode and enters the privileged EXEC mode.

 

What to Do Next

The database that is configured for remote-user authentication on the SSL VPN gateway can be a local database, as shown in this task, or the database can be accessed through any RADIUS or TACACS+ AAA server.

It is recommended that you use a separate AAA server, such as a Cisco ACS. A separate AAA server provides a more robust security solution. It allows you to configure unique passwords for each remote user and accounting and logging for remote-user sessions. Proceed to the "Configuring_AAA_for_SSL_VPN_Users_Using_a_Secure_Access_Control_Server" section to see more information.

Configuring AAA for SSL VPN Users Using a Secure Access Control Server

The steps in this task show how to configure AAA using a separate RADIUS or TACACS+ server. AAA is configured in global configuration mode. The authentication list or method is referenced in the SSL VPN context configuration with the aaa authentication command. The steps in this task configure AAA using a RADIUS server.

Before You Begin
  • SSL VPN gateway and context configurations are enabled and operational.
  • A RADIUS or TACACS+ AAA server is operational and reachable from the SSL VPN gateway.

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    aaa new-model

4.    aaa group server {radius group-name | tacacs+ group-name}

5.    server ip-address [auth-port port-number] [acct-port port-number]

6.    exit

7.    aaa authentication login {default | list-name} method1 [method2...]

8.    radius-server host {hostname | ip-address} [auth-port port-number] [acct-port port-number] [timeout seconds] [retransmit retries] [key string] [alias {hostname | ip-address}]

9.    webvpn context name

10.    aaa authentication {domain name | list name}

11.    end


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
aaa new-model


Example:

Device(config)# aaa new-model

 

Enables the AAA access control model.

 
Step 4
aaa group server {radius group-name | tacacs+ group-name}


Example:

Device(config)# aaa group server radius myServer

 

Configures a RADIUS or TACACS+ server group and specifies the authentication list or method, and enters server-group configuration mode.

 
Step 5
server ip-address [auth-port port-number] [acct-port port-number]


Example:

Device(config-sg-radius)# server 10.1.1.20 auth-port 1645 acct-port 1646

 

Configures the IP address of the AAA group server.

 
Step 6
exit


Example:

Device(config-sg-radius)# exit

 

Exits server-group configuration mode.

 
Step 7
aaa authentication login {default | list-name} method1 [method2...]


Example:

Device(config)# aaa authentication login default local group myServer

 

Sets AAA login parameters.

 
Step 8
radius-server host {hostname | ip-address} [auth-port port-number] [acct-port port-number] [timeout seconds] [retransmit retries] [key string] [alias {hostname | ip-address}]


Example:

Device(config)# radius-server host 10.1.1.20 auth-port 1645 acct-port 1646

 

Specifies a host as the group server.

 
Step 9
webvpn context name


Example:

Device(config)# webvpn context context1

 

Enters SSL VPN configuration mode to configure the SSL VPN context.

 
Step 10
aaa authentication {domain name | list name}


Example:

Device(config-webvpn-context)# aaa authentication domain myServer

 

Configures AAA authentication for SSL VPN sessions.

 
Step 11
end


Example:

Device(config-webvpn-context)# end

 

Exists the SSL VPN configuration mode and enters the privileged EXEC mode.

 

What to Do Next

Proceed to the section "Configuring_RADIUS_Attribute_Support_for_SSL_VPN" section to see RADIUS attribute-value pair information introduced to support this feature.

Configuring PKI Integration with a AAA Server

Perform this task to generate a AAA username from the certificate presented by the peer and specify which fields within a certificate should be used to build the AAA database username.


Note


The following restrictions should be considered when using the all keyword as the subject name for the authorization username command:

  • Some AAA servers limit the length of the username (for example, to 64 characters). As a result, the entire certificate subject name cannot be longer than the limitation of the server.
  • Some AAA servers limit the available character set that may be used for the username (for example, a space [ ] and an equal sign [=] may not be acceptable). You cannot use the all keyword for a AAA server having such a character-set limitation.
  • The subject-name command in the trustpoint configuration may not always be the final AAA subject name. If the fully qualified domain name (FQDN), serial number, or IP address of the router are included in a certificate request, the subject name field of the issued certificate will also have these components. To turn off the components, use the fqdn, serial-number, and ip-address commands with the none keyword.
  • CA servers sometimes change the requested subject name field when they issue a certificate. For example, CA servers of some vendors switch the relative distinguished names (RDNs) in the requested subject names to the following order: CN, OU, O, L, ST, and C. However, another CA server might append the configured LDAP directory root (for example, O=cisco.com) to the end of the requested subject name.
  • Depending on the tools you choose for displaying a certificate, the printed order of the RDNs in the subject name could be different. Cisco IOS software always displays the least significant RDN first, but other software, such as Open Source Secure Socket Layer (OpenSSL), does the opposite. Therefore, if you are configuring a AAA server with a full distinguished name (DN) (subject name) as the corresponding username, ensure that the Cisco IOS software style (that is, with the least significant RDN first) is used.

or

radius-server host hostname [key string]


SUMMARY STEPS

1.    enable

2.    configure terminal

3.    aaa new-model

4.    aaa authorization network listname [method]

5.    crypto pki trustpoint name

6.    enrollment [mode] [retry period minutes] [retry count number] url url [pem]

7.    revocation-check method

8.    exit

9.    authorization username subjectname subjectname

10.    authorization list listname

11.    tacacs-server host hostname [key string]


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Router> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Router# configure terminal

 

Enters global configuration mode.

 
Step 3
aaa new-model


Example:

Router(config)# aaa new-model

 

Enables the AAA access control model.

 
Step 4
aaa authorization network listname [method]


Example:

Router (config)# aaa authorization network maxaaa group tacacs+

 

Sets the parameters that restrict user access to a network.

  • method --Can be group radius, group tacacs+, or group group-name.
 
Step 5
crypto pki trustpoint name


Example:

Route (config)# crypto pki trustpoint msca

 

Declares the trustpoint and a given name and enters ca-trustpoint configuration mode.

 
Step 6
enrollment [mode] [retry period minutes] [retry count number] url url [pem]


Example:

Router (ca-trustpoint)# enrollment url http://caserver.myexample.com

- or-

Router (ca-trustpoint)# enrollment url http://[2001:DB8:1:1::1]:80

 

Specifies the following enrollment parameters of the CA:

  • (Optional) The mode keyword specifies the registration authority (RA) mode, if your CA system provides an RA. By default, RA mode is disabled.
  • (Optional) The retry period keyword and minutes argument specifies the period, in minutes, in which the router waits before sending the CA another certificate request. Valid values are from 1 to 60. The default is 1.
  • (Optional) The retry count keyword and number argument specifies the number of times a router will resend a certificate request when it does not receive a response from the previous request. Valid values are from 1 to 100. The default is 10.
  • The url argument is the URL of the CA to which your router should send certificate requests.
    Note    With the introduction of Cisco IOS Release 15.2(1)T, an IPv6 address can be added to the http: enrolment method. For example: http://[ipv6-address]:80. The IPv6 address must be enclosed in brackets in the URL. See the enrollment url (ca-trustpoint) command page for more information on the other enrollment methods that can be used.
  • (Optional) The pem keyword adds privacy-enhanced mail (PEM) boundaries to the certificate request.
 
Step 7
revocation-check method

Example:

Router (ca-trustpoint)# revocation-check crl

 

(Optional) Checks the revocation status of a certificate.

 
Step 8
exit


Example:

Router (ca-trustpoint)# exit

 

Exits ca-trustpoint configuration mode and returns to global configuration mode.

 
Step 9
authorization username subjectname subjectname


Example:

Router (config)# authorization username subjectname serialnumber

 

Sets parameters for the different certificate fields that are used to build the AAA username.

The subjectname argument can be any of the following:

  • all --Entire distinguished name (subject name) of the certificate.
  • commonname --Certification common name.
  • country --Certificate country.
  • email --Certificate e-mail.
  • ipaddress --Certificate IP address.
  • locality --Certificate locality.
  • organization --Certificate organization.
  • organizationalunit --Certificate organizational unit.
  • postalcode --Certificate postal code.
  • serialnumber --Certificate serial number.
  • state --Certificate state field.
  • streetaddress --Certificate street address.
  • title --Certificate title.
  • unstructuredname --Certificate unstructured name.
 
Step 10
authorization list listname


Example:

Route (config)# authorization list maxaaa

 

Specifies the AAA authorization list.

 
Step 11
tacacs-server host hostname [key string]


Example:

Router(config)# tacacs-server host 192.0.2.2 key a_secret_key



Example:

radius-server host hostname [key string]



Example:

Router(config)# radius-server host 192.0.2.1 key another_secret_key

 

Specifies a TACACS+ host.

or

Specifies a RADIUS host.

 

Configuring RADIUS Accounting for SSL VPN User Sessions

Before You Begin

Before configuring RADIUS accounting for SSL VPN user sessions, you should first have configured AAA-related commands (in global configuration mode) and have set the accounting list.


SUMMARY STEPS

1.    enable

2.    configure terminal

3.    aaa new-model

4.    webvpn context context-name

5.    aaa accounting list aaa-list

6.    end


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
aaa new-model


Example:

Device(config)# aaa new-model

 

Enables the AAA access control model.

 
Step 4
webvpn context context-name


Example:

Device(config)# webvpn context context1

 

Enters WebVPN context configuration mode to configure the SSL VPN context.

 
Step 5
aaa accounting list aaa-list


Example:

Device(config-webvpn-context)# aaa accounting list list1

 

Enables AAA accounting when you are using RADIUS for SSL VPN sessions.

 
Step 6
end


Example:

Device(config-webvpn-context)# end

 

Exists the WebVPN context configuration mode and enters the privileged EXEC mode.

 

Monitoring and Maintaining RADIUS Accounting for an SSL VPN Session

To monitor and maintain your RADIUS accounting configuration, perform the following steps (the debug commands can be used together or individually).

SUMMARY STEPS

1.    enable

2.    debug webvpn aaa

3.    debug aaa accounting

4.    end


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
debug webvpn aaa


Example:

Device# debug webvpn aaa

 

Enables SSL VPN session monitoring for AAA.

 
Step 3
debug aaa accounting


Example:

Device# debug aaa accounting

 

Displays information on accountable events as they occur.

 
Step 4
end


Example:

Device# end

 

Enters the privileged EXEC mode.

 

Configuring RADIUS Attribute Support for SSL VPN

This section lists RADIUS attribute-value (AV) pair information introduced to support SSL VPN. For information on using RADIUS AV pairs with Cisco IOS software, see the "Configuring RADIUS" chapter in the RADIUS Configuration Guide.

The following table shows information about SSL VPN RADIUS attribute-value pairs. All SSL VPN attributes (except for the standard IETF RADIUS attributes) start with webvpn: as follows:

webvpn:urllist-name=cisco webvpn:nbnslist-name=cifs webvpn:default-domain=cisco.com

Table 5 SSL VPN RADIUS Attribute-Value Pairs

Attribute

Type of Value

Values

Default

addr (Framed-IP-Address1)

ipaddr

IP_address

--

addr-pool

string

name

--

auto-applet-download

integer

0 (disable) 1 (enable)2

0

banner

string

--

citrix-enabled

integer

0 (disable) 1 (enable)3

0

default-domain

string

--

--

dns-servers

ipaddr

IP_address

--

dpd-client-timeout

integer (seconds)

0 (disabled)-3600

300

dpd-gateway-timeout

integer (seconds)

0 (disabled)-3600

300

file-access

integer

0 (disable) 1 (enable). See the "Configuring RADIUS Attribute Support for SSL VPN" section.

0

file-browse

integer

0 (disable) 1 (enable). See the "Configuring RADIUS Attribute Support for SSL VPN" section.

0

file-entry

integer

0 (disable) 1 (enable). See the "Configuring RADIUS Attribute Support for SSL VPN" section.

0

hide-urlbar

integer

0 (disable) 1 (enable). See the "Configuring RADIUS Attribute Support for SSL VPN" section.

0

home-page

string

--

--

idletime (Idle-Timeout). See the "Configuring RADIUS Attribute Support for SSL VPN" section.

integer (seconds)

0-3600

2100

ie-proxy-exception

string

DNS_name

--

ipaddr

IP_address

--

ie-proxy-server

ipaddr

IP_address

--

inacl

integer

1-199, 1300-2699

--

string

name

--

keep-svc-installed

integer

0 (disable) 1 (enable). See the "Configuring RADIUS Attribute Support for SSL VPN" section.

1

nbnslist-name

string

name

--

netmask (Framed-IP-Netmask) "Configuring RADIUS Attribute Support for SSL VPN" section.

ipaddr

IP_address_mask

--

port-forward-auto

integer

0 (disable) 1 (enable)

If this AV pair is not configured, the default is whatever was configured for the group policy.

If this AV pair is configured with an integer of 1, the 1 will override a group policy value of 0.

port-forward-http-proxy

integer

0 (disable) 1 (enable)

HTTP proxy is not enabled.

If this AV pair is configured with an integer of 1, the 1 will override a group policy value of 0.

port-forward-http-proxy-url

string

URL address (for example, http://example.com)

--

port-forward-name

string

name

--

primary-dns

ipaddr

IP_address

--

rekey-interval

integer (seconds)

0-43200

21600

secondary-dns

ipaddr

IP_address

--

split-dns

string

--

--

split-exclude4

ipaddr ipaddr

IP_address IP_address_mask

--

word

local-lans

--

split-include "Configuring RADIUS Attribute Support for SSL VPN" section.

ipaddr ipaddr

IP_address IP_address_mask

--

sso-server-name

string

name

--

svc-enabled5

integer

0 (disable) 1 (enable). See the "Configuring RADIUS Attribute Support for SSL VPN" section.

0

svc-ie-proxy-policy

word

none, auto, bypass-local

--

svc-required "Configuring RADIUS Attribute Support for SSL VPN" section.

integer

0 (disable) 1 (enable). See the "Configuring RADIUS Attribute Support for SSL VPN" section.

0

timeout (Session-Timeout) "Configuring RADIUS Attribute Support for SSL VPN" section.

integer (seconds)

1-1209600

43200

urllist-name

string

name

--

user-vpn-group

string

name

--

wins-server-primary

ipaddr

IP_address

--

wins-servers

ipaddr

IP_address

--

wins-server-secondary

ipaddr

IP_address

--

1 Standard IETF RADIUS attributes.
2 Any integer other than 0 enables this feature.
3 Any integer other than 0 enables this feature.
4 You can specify either split-include or split-exclude, but you cannot specify both options.
5 You can specify either svc-enable or svc-required, but you cannot specify both options.

What to Do Next

See the Configuring_a_URL_List_for_Clientless_Remote_Access section for information about customizing the URL list configured in Step 10 of the Configuring_an_SSL_VPN_Policy_Group section.

Configuring a URL List for Clientless Remote Access

The steps in this configuration task show how to configure a URL list. The URL list, as the name implies, is a list of HTTP URLs that are displayed on the portal page after a successful login. The URL list is configured in WebVPN context configuration and WebVPN group policy configuration modes.

Before You Begin

SSL VPN gateway and context configurations are enabled and operational.


SUMMARY STEPS

1.    enable

2.    configure terminal

3.    webvpn context name

4.    url-list name

5.    heading text-string

6.    url-text name url-value url

7.    exit

8.    policy group name

9.    url-list name

10.    end


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
webvpn context name


Example:

Device(config)# webvpn context context1

 

Enters WebVPN context configuration mode to configure the SSL VPN context.

 
Step 4
url-list name


Example:

Device(config-webvpn-context)# url-list ACCESS

 

Enters WebVPN URL list configuration mode to configure the list of URLs to which a user has access on the portal page of an SSL VPN.

 
Step 5
heading text-string


Example:

Device(config-webvpn-url)# heading "Quick Links"

 

Configures the heading that is displayed above URLs listed on the portal page of an SSL VPN.

  • The heading for the URL list is entered as a text string. The heading must be entered inside of quotation marks if it contains spaces.
 
Step 6
url-text name url-value url


Example:

Device(config-webvpn-url)# url-text "Human Resources" url-value example.com

 

Adds an entry to a URL list.

 
Step 7
exit


Example:

Device(config-webvpn-url)# exit

 

Exits WebVPN URL list configuration mode, and enters SSL VPN context configuration mode.

 
Step 8
policy group name


Example:

Device(config-webvpn-context)# policy group ONE

 

Enters WebVPN group policy configuration mode to configure a group policy.

 
Step 9
url-list name


Example:

Device(config-webvpn-group)# url-list ACCESS

 

Attaches the URL list to the policy group configuration.

 
Step 10
end


Example:

Device(config-webvpn-group)# end

 

Exists the WebVPN group policy configuration mode and enters the privileged EXEC mode.

 

What to Do Next

See the Configuring_Microsoft_File_Shares_for_Clientless_Remote_Access section for information about configuring clientless remote access to file shares.

Configuring Microsoft File Shares for Clientless Remote Access

In clientless remote access mode, files and directories created on Microsoft Windows servers can be accessed by the remote client through the HTTPS-enabled browser. When clientless remote access is enabled, a list of file server and directory links is displayed on the portal page after login. The administrator can customize permissions on the SSL VPN gateway to provide limited read-only access for a single file or full-write access and network browsing capabilities. The following access capabilities can be configured:

  • Network browse (listing of domains)
  • Domain browse (listing of servers)
  • Server browse (listing of shares)
  • Listing files in a share
  • Downloading files
  • Modifying files
  • Creating new directories
  • Creating new files
  • Deleting files

Common Internet File System Support--CIFS is the protocol that provides access to Microsoft file shares and support for common operations that allow shared files to be accessed or modified.

NetBIOS Name Service Resolution--Windows Internet Name Service (WINS) uses NetBIOS name resolution to map and establish connections between Microsoft servers. A single server must be identified by its IP address in this configuration. Up to three servers can be added to the configuration. If multiple servers are added, one server should be configured as the master browser.

Samba Support--Microsoft file shares can be accessed through the browser on a Linux system that is configured to run Samba.

Before You Begin
  • SSL VPN gateway and context configurations are enabled and operational.
  • A Microsoft file server is operational and reachable from the SSL VPN gateway over TCP/IP.

Note


File shares configured on Windows 2008 is not supported. Only file shares configured on Microsoft Windows 2000, Windows 2003, Windows XP, and Red Hat Linux servers are supported.

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    webvpn context name

4.    nbns-list name

5.    nbns-server ip-address [master] [timeout seconds] [retries number]

6.    exit

7.    policy group name

8.    nbns-list name

9.    functions {file-access | file-browse | file-entry | svc-enabled | svc-required}

10.    end


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
webvpn context name


Example:

Device(config)# webvpn context context1

 

Enters WebVPN context configuration mode to configure the SSL VPN context.

 
Step 4
nbns-list name


Example:

Device(config-webvpn-context)# nbns-list SERVER_LIST

 

Enters WebVPN NBNS list configuration mode to configure an NBNS server list for CIFS name resolution.

 
Step 5
nbns-server ip-address [master] [timeout seconds] [retries number]


Example:

Device(config-webvpn-nbnslist)# nbns-server 172.16.1.1 master

 

Adds a server to an NBNS server list and enters WebVPN NBNS list configuration mode.

  • The server specified with the ip-address argument can be a primary domain controller (PDC) in a Microsoft network.
  • When multiple NBNS servers are specified, a single server is configured as master browser.
  • Up to three NBNS server statements can be configured.
 
Step 6
exit


Example:

Device(config-webvpn-nbnslist)# exit

 

Exits WebVPN NBNS list configuration mode and enters WebVPN context configuration mode.

 
Step 7
policy group name


Example:

Device(config-webvpn-context)# policy group ONE

 

Enters WebVPN group policy configuration mode to configure a group policy.

 
Step 8
nbns-list name


Example:

Device(config-webvpn-group)# nbns-list SERVER_LIST

 

Attaches an NBNS server list to a policy group configuration.

 
Step 9
functions {file-access | file-browse | file-entry | svc-enabled | svc-required}


Example:

Device(config-webvpn-group)# functions file-access

 

Configures access for Microsoft file shares.

  • Entering the file-access keyword enables network file share access. File servers in the server list are listed on the SSL VPN portal page when this keyword is enabled.
  • Entering the file-browse keyword enables browse permissions for server and file shares. The file-access function must be enabled in order to also use this function.
  • Entering the file-entry keyword enables "modify" permissions for files in the shares listed on the SSL VPN portal page.
 
Step 10
end


Example:

Device(config-webvpn-group)# end

 

Exists the WebVPN group policy configuration mode and enters the privileged EXEC mode.

 

What to Do Next

See the Configuring_Citrix_Application_Support_for_Clientless_Remote_Access section for information about configuring clientless remote access for Citrix- enabled applications.

Configuring Citrix Application Support for Clientless Remote Access

Clientless Citrix support allows the remote user to run Citrix-enabled applications through the SSL VPN as if the application were locally installed (similar to traditional thin-client computing). Citrix applications run on a MetaFrame XP server (or server farm). The SSL VPN gateway provides access to the remote user. The applications run in real time over the SSL VPN. This task shows how to enable Citrix support for policy group remote users.

The Independent Computing Architecture (ICA) client carries keystrokes and mouse clicks from the remote user to the MetaFrame XP server. ICA traffic is carried over TCP port number 1494. This port is opened when a Citrix application is accessed. If multiple application are accessed, the traffic is carried over a single TCP session.

Before You Begin
  • A Citrix MetaFrame XP server is operational and reachable from the SSL VPN gateway over TCP/IP.
  • SSL VPN gateway and context configurations are enabled and operational.

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    access-list access-list-number {permit | deny} protocol source destination

4.    webvpn context name

5.    policy group name

6.    citrix enabled

7.    filter citrix extended-acl

8.    end


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
access-list access-list-number {permit | deny} protocol source destination


Example:

Device(config)# access-list 100 permit ip 192.168.1.0 0.255.255.255

 

Configures the access list mechanism for filtering frames by protocol type or vendor code.

 
Step 4
webvpn context name


Example:

Device(config)# webvpn context context1

 

Enters WebVPN context configuration mode to configure the SSL VPN context.

 
Step 5
policy group name


Example:

Device(config-webvpn-context)# policy group ONE

 

Enters WebVPN group policy configuration mode to configure a group policy.

 
Step 6
citrix enabled


Example:

Device(config-webvpn-group)# citrix enabled

 

Enables Citrix application support for remote users in a policy group.

 
Step 7
filter citrix extended-acl


Example:

Device(config-webvpn-group)# filter citrix 100

 

Configures a Citrix Thin Client filter.

  • An extended access list is configured to define the Thin Client filter. This filter is used to control remote user access to Citrix applications.
 
Step 8
end


Example:

Device(config-webvpn-group)# end

 

Enters WebVPN group policy configuration mode and enters the privileged EXEC mode.

 

What to Do Next

Support for standard applications that use well-known port numbers, such as e-mail and Telnet, can be configured using the port forwarding feature. See the Configuring_Application_Port_Forwarding section for more information.

Configuring Application Port Forwarding

Application port forwarding is configured for thin-client mode SSL VPN. Port forwarding extends the cryptographic functions of the SSL-protected browser to provide remote access to TCP and UDP-based applications that use well-known port numbers, such as POP3, SMTP, IMAP, Telnet, and SSH.

When port forwarding is enabled, the hosts file on the SSL VPN client is modified to map the application to the port number configured in the forwarding list. The application port mapping is restored to default when the user terminates the SSL VPN session.

When you are enabling port forwarding, the SSL VPN gateway will modify the hosts file on the PC of the remote user. Some software configurations and software security applications will detect this modification and prompt the remote user to choose "Yes" to permit. To permit the modification, the remote user must have local administrative privileges.


Note


There is a known compatibility issue with the encryption type and Java. If the Java port-forwarding applet does not download properly and the configuration line ssl encryption 3des-sha1 aes-sha1 is present, you should remove the line from the WebVPN gateway subconfiguration.
Before You Begin

SSL VPN gateway and SSL VPN context configurations are enabled and operational.


SUMMARY STEPS

1.    enable

2.    configure terminal

3.    webvpn context name

4.    port-forward name

5.    local-port number remote-server name remote-port number description text-string

6.    exit

7.    policy group name

8.    port-forward name

9.    exit

10.    end


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
webvpn context name


Example:

Device(config)# webvpn context context1

 

Enters WebVPN context configuration mode to configure the SSL VPN context.

 
Step 4
port-forward name


Example:

Device(config-webvpn-context)# port-forward EMAIL

 

Enters WebVPN port-forward list configuration mode to configure a port forwarding list.

 
Step 5
local-port number remote-server name remote-port number description text-string


Example:

Device(config-webvpn-port-fwd)# local-port 30016 remote-server example.com remote-port 110 description POP3

 

Remaps (forwards) an application port number in a port forwarding list.

  • The remote port number is the well-known port to which the application listens. The local port number is the entry configured in the port forwarding list. A local port number can be configured only once in a given port forwarding list.
 
Step 6
exit


Example:

Device(config-webvpn-port-fwd)# exit

 

Exits WebVPN port-forward list configuration mode, and enters WebVPN context configuration mode.

 
Step 7
policy group name


Example:

Device(config-webvpn-context)# policy group ONE

 

Enters WebVPN group policy configuration mode to configure a group policy.

 
Step 8
port-forward name


Example:

Device(config-webvpn-group)# port-forward EMAIL

 

Attaches a port forwarding list to a policy group configuration.

 
Step 9
exit


Example:

Device(config-webvpn-context)# exit

 

Exits WebVPN port-forward list configuration mode, and enters WebVPN context configuration mode.

 
Step 10
end


Example:

Device(config-webvpn-group)# end

 

Exists the WebVPN context configuration mode and enters the privileged EXEC mode.

 

Configuring the SSL VPN Gateway to Distribute CSD and Cisco AnyConnect VPN Client Package Files

The SSL VPN gateway is preconfigured to distribute Cisco Secure Desktop (CSD) or Cisco AnyConnect VPN Client software package files to remote users. The files are distributed only when CSD or Cisco AnyConnect VPN Client support is needed. The administrator performs the following tasks to prepare the gateway:

  • The current software package is downloaded from www.cisco.com.
  • The package file is copied to a local file system.
  • The package file is installed for distribution by configuring the crypto vpn command.

The remote user must have administrative privileges, and the JRE for Windows version 1.4 or later must be installed before the CSD client package can be installed.

For Cisco AnyConnect VPN Client software installation, the remote user must have either the Java Runtime Environment for Windows (version 1.4 or later), or the browser must support or be configured to permit Active X controls.

CSD and Cisco AnyConnect VPN Client software packages should be installed for distribution on the SSL VPN gateway. Download the latest version that supports your device and the image you are using (consult a compatibility matrix for your particular setup).

The CSD software package can be downloaded at the following URL:

The Cisco AnyConnect VPN Client software package can be downloaded at the following URL:

The Cisco SSL VPN Client software package can be downloaded at the following URL:

You will be prompted to enter your login name and password to download these files from cisco.com.

Before You Begin
  • SSL VPN gateway and context configurations are enabled and operational.
  • Software installation packages are copied to a local files system, such as flash memory.

Note


Effective with Cisco IOS Release 12.4(20)T, multiple packages can be downloaded to a gateway.

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    crypto vpn {anyconnect file name sequence sequence-number}

4.    end


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
crypto vpn {anyconnect file name sequence sequence-number}


Example:

Device(config)# crypto vpn anyconnect filea sequence 5

 

Installs a CSD or Cisco AnyConnect VPN Client package file to an SSL VPN gateway for distribution to remote users.

  • The CSD and Cisco AnyConnect VPN Client software packages are pushed to remote users as access is needed.
  • The sequence keyword and sequence-number argument are used to install multiple packages to a gateway.
 
Step 4
end


Example:

Device(config)# end

 

Exists the global configuration mode and enters the privileged EXEC mode.

 

What to Do Next

Support for CSD and Cisco AnyConnect VPN Client can be enabled for remote users after the gateway has been prepared to distribute CSD or Cisco AnyConnect VPN Client software.

Configuring Cisco Secure Desktop Support

CSD provides a session-based interface where sensitive data can be shared for the duration of an SSL VPN session. All session information is encrypted. All traces of the session data are removed from the remote client when the session is terminated, even if the connection is terminated abruptly. CSD support for remote clients is enabled in this task.

The remote user (PC or device) must have administrative privileges, and the JRE for Windows version 1.4 or later must be installed before the CSD client packages can be installed.

Before You Begin
  • SSL VPN gateway and context configurations are enabled and operational.
  • The CSD software package is installed for distribution on the SSL VPN gateway.

See the Configuring the SSL VPN Gateway to Distribute CSD and Cisco AnyConnect VPN Client Package Files section if you have not already prepared the SSL VPN gateway to distribute CSD software.


Note


Only Microsoft Windows 2000, Windows XP, Windows Vista, Apple-Mac, and Linux are supported on the remote client.

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    crypto vpn

4.    csd enable

5.    end


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
crypto vpn


Example:

Device(config)# crypto vpn csd bgl12

 

Installs the CSD on an SSL VPN gateway.

 
Step 4
csd enable


Example:

Device(config)# csd enable

 

Enables CSD support for SSL VPN sessions.

 
Step 5
end


Example:

Device(config)# end

 

Exists the global configuration mode and enters the privileged EXEC mode.

 

What to Do Next

Upon completion of this task, the SSL VPN gateway has been configured to provide clientless and thin-client support for remote users. The SSL VPN feature also has the capability to provide full VPN access (similar to IPsec). Proceed to the Configuring_Cisco_AnyConnect_VPN_Client_Full_Tunnel_Support section to see more information.

Configuring Cisco AnyConnect VPN Client Full Tunnel Support

The Cisco AnyConnect VPN Client is an application that allows a remote user to establish a full VPN connection similar to the type of connection that is established with an IPsec VPN. Cisco AnyConnect VPN Client software is pushed (downloaded) and installed automatically on the PC of the remote user. The Cisco AnyConnect VPN Client uses SSL to provide the security of an IPsec VPN without the complexity required to install IPsec in your network and on remote devices. The following tasks are completed in this configuration:

  • An access list is applied to the tunnel to restrict VPN access.
  • Cisco AnyConnect VPN Client tunnel support is enabled.
  • An address pool is configured for assignment to remote clients.
  • The default domain is configured.
  • DNS is configured for Cisco AnyConnect VPN Client tunnel clients.
  • Dead peer timers are configured for the SSL VPN gateway and remote users.
  • The login home page is configured.
  • The Cisco AnyConnect VPN Client software package is configured to remain installed on the remote client.
  • Tunnel key refresh parameters are defined.
Before You Begin
  • SSL VPN gateway and context configurations are enabled and operational.
  • The Cisco AnyConnect VPN Client software package is installed for distribution on the SSL VPN gateway.
  • The remote client has administrative privileges. Administrative privileges are required to download the SSL VPN software client.

See the Configuring the SSL VPN Gateway to Distribute CSD and Cisco AnyConnect VPN Client Package Files section if you have not already prepared the SSL VPN gateway to distribute SSL VPN software.


Note


Only Microsoft Windows 2000, Windows XP, Windows Vista, Apple-Mac, and Linux are supported on the remote client.

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    webvpn context name

4.    policy group name

5.    filter tunnel extended-acl

6.    functions {file-access | file-browse | file-entry | svc-enabled | svc-required}

7.    svc address-pool name netmask ip-netmask

8.    svc default-domain name

9.    svc dns-server {primary | secondary} ip-address

10.    svc dpd-interval {client | gateway} seconds

11.    svc keepalive seconds

12.    svc homepage string

13.    svc keep-client-installed

14.    svc rekey {method {new-tunnel | ssl} | time seconds}

15.    end


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
webvpn context name


Example:

Device(config)# webvpn context context1

 

Enters WebVPN context configuration mode to configure the SSL VPN context.

 
Step 4
policy group name


Example:

Device(config-webvpn-context)# policy group ONE

 

Enters WebVPN group policy configuration mode to configure a group policy.

 
Step 5
filter tunnel extended-acl


Example:

Device(config-webvpn-group)# filter tunnel 101

 

Configures an SSL VPN tunnel access filter.

  • The tunnel access filter is used to control network and application level access. The tunnel filter is also defined in an extended access list.
 
Step 6
functions {file-access | file-browse | file-entry | svc-enabled | svc-required}


Example:

Device(config-webvpn-group)# functions svc-enabled

 

Configures Cisco AnyConnect VPN Client tunnel mode support.

  • Entering the svc-enabled keyword enables tunnel support for the remote user. If the Cisco AnyConnect VPN Client software package fails to install, the remote user can continue to use clientless mode or thin-client mode.
  • Entering the svc-required keyword enables only tunnel support for the remote user. If the Cisco AnyConnect VPN Client software package fails to install (on the PC of the remote user), the other access modes cannot be used.
 
Step 7
svc address-pool name netmask ip-netmask


Example:

Device(config-webvpn-group)# svc address-pool ADDRESSES netmask 255.255.255.0

 

Configures a pool of IP addresses to assign to remote users in a policy group.

  • The address pool is first defined with the ip local pool command in global configuration mode.
  • If you are configuring an address pool for a network that is not direc tly connected, an address from the pool must be configured on a locally loopback interface. See the third example at the end of this section.
 
Step 8
svc default-domain name


Example:

Device(config-webvpn-group)# svc default-domain cisco.com

 

Configures the default domain for a policy group.

 
Step 9
svc dns-server {primary | secondary} ip-address


Example:

Device(config-webvpn-group)# svc dns-server primary 192.168.3.1

 

Configures DNS servers for policy group remote users.

 
Step 10
svc dpd-interval {client | gateway} seconds


Example:

Device(config-webvpn-group)# svc dpd-interval gateway 30

 

Configures the dead peer detection (DPD) timer value for the gateway or client.

  • The DPD timer is reset every time a packet is received over the SSL VPN tunnel from the gateway or remote user.
 
Step 11
svc keepalive seconds


Example:

Device(config-webvpn-group)# svc keepalive 300

 

(Optional) Enables the SVC to send keepalive messages by default with a frequency of 30 seconds.

  • Use this command to adjust the frequency of keepalive messages to ensure that an SVC connection through a proxy, Cisco IOS firewall, or NAT device remains active, even if the device limits the time that the connection can be idle. Adjusting the frequency also ensures that the SVC does not disconnect and reconnect when the remote user is not actively running a socket-based application, such as Microsoft Outlook or Microsoft Internet Explorer.
  • If the svc keepalive command is configured with a value of 0 seconds, then the keepalive function is disabled.
 
Step 12
svc homepage string


Example:

Device(config-webvpn-group)# svc homepage www.cisco.com

 

Configures the URL of the web page that is displayed upon successful user login.

  • The string argument is entered as an HTTP URL. The URL can be up to 255 characters in length.
 
Step 13
svc keep-client-installed


Example:

Device(config-webvpn-group)# svc keep-client-installed

 

Configures the remote user to keep Cisco AnyConnect VPN Client software installed when the SSL VPN connection is not enabled.

 
Step 14
svc rekey {method {new-tunnel | ssl} | time seconds}


Example:

Device(config-webvpn-group)# svc rekey method new-tunnel

 

Configures the time and method that a tunnel key is refreshed for policy group remote users.

  • The tunnel key is refreshed by renegotiating the SSL connection or initiating a new tunnel connection.
  • The time interval between tunnel refresh cycles is configured in seconds.
 
Step 15
end


Example:

Device(config-webvpn-group)# end

 

Exists the WebVPN group policy configuration mode and enters the privileged EXEC mode.

 

Examples

Tunnel Filter Configuration

The following example, starting in global configuration mode, configures a deny access filter for any host from the 172.16.2/24 network:

Device(config)# access-list 101 deny ip 172.16.2.0 0.0.0.255 any
Device(config)# webvpn context context1
Device(config-webvpn-context)# policy group ONE
Device(config-webvpn-group)# filter tunnel 101
Device(config-webvpn-group)# end
Address Pool (Directly Connected Network) Configuration

The following example, starting in global configuration mode, configures the 192.168.1/24 network as an address pool:

Device(config)# ip local pool ADDRESSES 192.168.1.1 192.168.1.254 
Device(config)# webvpn context context1 
Device(config-webvpn-context)# policy group ONE 
Device(config-webvpn-group)# svc address-pool ADDRESSES 
Device(config-webvpn-group)# end 
Address Pool (Nondirectly Connected Network) Configuration

The following example, starting in global configuration mode, configures the 172.16.1/24 network as an address pool. Because the network is not directly connected, a local loopback interface is configured.

Device(config)# interface loopback 0 
Device(config-int)# ip address 172.16.1.126 255.255.255.0 
Device(config-int)# no shutdown 
Device(config-int)# exit 
Device(config)# ip local pool ADDRESSES 172.16.1.1 172.16.1.254 
Device(config)# webvpn context context1 
Device(config-webvpn-context)# policy group ONE 
Device(config-webvpn-group)# svc address-pool ADDRESSES 
Device(config-webvpn-group)# end 
Full Tunnel Configuration

The following example, starting in global configuration mode, configures full Cisco AnyConnect VPN Client tunnel support on an SSL VPN gateway:

Device(config)# webvpn context context1
Device(config-webvpn-context)# policy group ONE
Device(config-webvpn-group)# functions svc-enabled
Device(config-webvpn-group)# functions svc-required
Device(config-webvpn-group)# svc default-domain cisco.com
Device(config-webvpn-group)# svc dns-server primary 192.168.3.1
Device(config-webvpn-group)# svc dns-server secondary 192.168.4.1
Device(config-webvpn-group)# svc dpd-interval gateway 30
Device(config-webvpn-group)# svc dpd-interval client 300
Device(config-webvpn-group)# svc homepage www.cisco.com
Device(config-webvpn-group)# svc keep-client-installed
Device(config-webvpn-group)# svc rekey method new-tunnel
Device(config-webvpn-group)# svc rekey time 3600
Device(config-webvpn-group)# end 

What to Do Next

Proceed to the Configuring_Advanced_SSL_VPN_Tunnel_Features section to see advanced Cisco AnyConnect VPN Client tunnel configuration information.

Configuring Advanced SSL VPN Tunnel Features

This section describes advanced Cisco AnyConnect VPN Client tunnel configurations. The following configuration steps are completed in this task:

  • Split tunnel support and split DNS resolution are enabled on the SSL VPN gateway.
  • SSL VPN gateway support for Microsoft Internet Explorer proxy settings is configured.
  • WINS resolution is configured for Cisco AnyConnect VPN Client tunnel clients.

Microsoft Internet Explorer Proxy Configuration--The SSL VPN gateway can be configured to pass or bypass Microsoft Internet Explorer (MSIE) proxy settings. Only HTTP proxy settings are supported by the SSL VPN gateway. MSIE proxy settings have no effect on any other supported browser.

Split Tunneling--Split tunnel support allows you to configure a policy that permits specific traffic to be carried outside of the Cisco AnyConnect VPN Client tunnel. Traffic is either included (resolved in tunnel) or excluded (resolved through the Internet service provider [ISP] or WAN connection). Tunnel resolution configuration is mutually exclusive. An IP address cannot be both included and excluded at the same time. Entering the local-lans keyword permits the remote user to access resources on a local LAN, such as network printer.

Before You Begin
  • SSL VPN gateway and context configurations are enabled and operational.
  • The Cisco AnyConnect VPN Client software package is installed for distribution on the SSL VPN gateway.

Note


Only Microsoft Windows 2000, Windows XP, Windows Vista, Apple-Mac, and Linux are supported on the remote client.

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    webvpn context name

4.    policy group name

5.    svc split exclude {{ip-address mask | local-lans} | include ip-address mask}

6.    svc split dns name

7.    svc msie-proxy {exception host | option {auto | bypass-local | none}}

8.    svc msie-proxy server host

9.    svc wins-server {primary | secondary} ip-address

10.    end


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
webvpn context name


Example:

Device(config)# webvpn context context1

 

Enters WebVPN context configuration mode to configure the SSL VPN context.

 
Step 4
policy group name


Example:

Device(config-webvpn-context)# policy group ONE

 

Enters WebVPN group policy configuration mode to configure a group policy.

 
Step 5
svc split exclude {{ip-address mask | local-lans} | include ip-address mask}


Example:

Device(config-webvpn-group)# svc split exclude 192.168.1.1 0.0.0.255

 

Configures split tunneling for policy group remote users.

  • Split tunneling is configured to include or exclude traffic in the Cisco AnyConnect VPN Client tunnel. Traffic that is included is sent over the SSL VPN tunnel. Excluded traffic is resolved outside of the tunnel.
  • Exclude and include statements are configured with IP address/wildcard mask pairs.
 
Step 6
svc split dns name


Example:

Device(config-webvpn-group)# svc split dns www.examplecompany.com

 

Configures the SSL VPN gateway to resolve the specified fully qualified DNS names through the Cisco AnyConnect VPN Client tunnel.

  • A default domain was configured in the previous task with the svc default-domain command. DNS names configured with the svc split dns command are configured in addition.
  • Up to 10 split DNS statements can be configured.
 
Step 7
svc msie-proxy {exception host | option {auto | bypass-local | none}}


Example:

Device(config-webvpn-group)# svc msie-proxy option auto

 

Configures MSIE browser proxy settings for policy group remote users.

  • Entering the option auto keywords configures the browser of the remote user to autodetect proxy settings.
  • Entering the option bypass-local keywords configures local addresses to bypass the proxy.
  • Entering the option none keywords configures the browser on the remote client to not use a proxy.
 
Step 8
svc msie-proxy server host


Example:

Device(config-webvpn-group)# svc msie-proxy server 10.10.10.1:80

 

Specifies an MSIE proxy server for policy group remote users.

  • The proxy server is specified by entering an IP address or a fully qualified domain name.
 
Step 9
svc wins-server {primary | secondary} ip-address


Example:

Device(config-webvpn-group)# svc wins-server primary 172.31.1.1

 

Configures WINS servers for policy group remote users.

 
Step 10
end


Example:

Device(config-webvpn-group)# end

 

Exists the WebVPN group policy configuration mode and enters the privileged EXEC mode.

 

Examples

Split DNS Configuration

The following example, starting in global configuration mode, configures the following DNS names to be resolved in the Cisco AnyConnect VPN Client tunnel:

Device(config)# webvpn context context1 
Device(config-webvpn-context)# policy group ONE
Device(config-webvpn-group)# svc split dns www.example.com
Device(config-webvpn-group)# svc split dns myexample.com
Including and Excluding IP Prefixes

The following example configures a list of IP addresses to be resolved over the tunnel (included) and a list to be resolved outside of the tunnel (excluded):

Device(config-webvpn-group)# svc split exclude 192.168.1.0 255.255.255.0
Device(config-webvpn-group)# svc split include 172.16.1.0 255.255.255.0
MSIE Proxy Configuration

The following example configures MSIE proxy settings:

Device(config-webvpn-group)# svc msie-proxy option auto
Device(config-webvpn-group)# svc msie-proxy exception www.example.com
Device(config-webvpn-group)# svc msie-proxy exception 10.20.20.1
Device(config-webvpn-group)# svc msie-proxy server 10.10.10.1:80
WINS Server Configuration

The following example configures primary and secondary WINS servers for the policy group:

Device(config-webvpn-group)# svc wins-server primary 172.31.1.1
Device(config-webvpn-group)# svc wins-server secondary 172.31.2.1
Device(config-webvpn-group)# svc wins-server secondary 172.31.3.1
Device(config-webvpn-group)# end

Configuring VRF Virtualization

VRF Virtualization allows you to associate a traditional VRF with an SSL VPN context configuration. This feature allows you to apply different configurations and reuse address space for different groups of users in your organization.

Before You Begin
  • A VRF has been configured in global configuration mode.
  • SSL VPN gateway and context configurations are enabled and operational.
  • A policy group has been configured and associated with the WebVPN context.

Note


Only a single VRF can be configured for each SSL VPN context configuration.

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    webvpn context name

4.    vrf-name name

5.    end


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
webvpn context name


Example:

Device(config)# webvpn context context1

 

Enters WebVPN context configuration mode to configure the SSL VPN context.

 
Step 4
vrf-name name


Example:

Device(config-webvpn-context)# vrf-name vrf1

 

Associates a VRF with an SSL VPN context.

Note    When you configure the VRF Virtualization feature in Cisco IOS Release 12.4(24)T1 and later releases, the following message is displayed:
% IP VRF vrf1 configuration applied.
% But please use Virtual-Template to configure VRF.

See the Configuring SSLVPN DVTI Support section for the procedure to configure IP features using virtual template.

 
Step 5
end


Example:

Device(config-webvpn-context)# end

 

Exists the WebVPN context configuration mode and enters the privileged EXEC mode.

 

Configuring ACL Rules

The ACL rules can be overridden for an individual user when the user logs in to the gateway (using AAA policy attributes). If a user session has no ACL attribute configured, all application requests from that user session are permitted by default.

Before You Begin

Before configuring the ACL rules, you must have first configured the time range using the time-range command (this prerequisite is in addition to optionally configuring the time range, in the task table, as part of the permit or deny entries).


Note


There is no limitation on the maximum number of filtering rules that can be configured for each ACL entry, but keeping the number below 50 should have no significant impact on router performance.

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    webvpn context name

4.    acl acl-name

5.   Do one of the following:

  • permit [url [any | url-string]] [ip | tcp | udp | http | https | cifs] [any | source-ip source-mask] [any | destination-ip destination-mask] [time-range time-range-name] [syslog]
  • deny [url [any | url-string]] [ip | tcp | udp | http | https | cifs] [any | source-ip source-mask] [any | destination-ip destination-mask] [time-range time-range-name] [syslog]

6.    add position acl-entry

7.    error-url access-deny-page-url

8.    error-msg message-string

9.    list

10.    end


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
webvpn context name


Example:

Device(config)# webvpn context context1

 

Enters WebVPN context configuration mode to configure the SSL VPN context.

 
Step 4
acl acl-name


Example:

Device(config-webvpn-context)# acl acl1

 

Defines the ACL and enters WebVPN ACL configuration mode.

 
Step 5
Do one of the following:
  • permit [url [any | url-string]] [ip | tcp | udp | http | https | cifs] [any | source-ip source-mask] [any | destination-ip destination-mask] [time-range time-range-name] [syslog]
  • deny [url [any | url-string]] [ip | tcp | udp | http | https | cifs] [any | source-ip source-mask] [any | destination-ip destination-mask] [time-range time-range-name] [syslog]


Example:

Device(config-webvpn-acl)# permit url any

 

Sets conditions in a named SSL VPN access list that will permit or deny packets.

 
Step 6
add position acl-entry


Example:

Device(config-webvpn-acl)# add 3 permit url any

 

(Optional) Adds an ACL entry at a specified position.

 
Step 7
error-url access-deny-page-url


Example:

Device(config-webvpn-acl)# error-url "http://www.example.com"

 

(Optional) Defines a URL as an ACL violation page.

  • If the error-url command is configured, the user is redirected to a predefined URL for every request that is not allowed. If the error-url command is not configured, the user gets a standard, gateway-generated error page.
 
Step 8
error-msg message-string


Example:

Device(config-webvpn-acl)# error-msg "If you have any questions, please contact <a href+mailto:employee1@example.com>Employee1</a>."

 

(Optional) Displays a specific error message when a user logs in and his or her request is denied.

 
Step 9
list


Example:

Device(config-webvpn-acl)# list

 

(Optional) Lists the currently configured ACL entries sequentially and assigns a position number.

 
Step 10
end


Example:

Device(config-webvpn-acl)# end

 

Exists the WebVPN ACL configuration mode and enters the privileged EXEC mode.

 

Associating an ACL Attribute with a Policy Group


Note


Associating an ACL attribute for an individual user must be performed as part of a AAA operation.
  • The ACL rules can be overridden for an individual user when the user logs in to the gateway (using AAA policy attributes).
  • If a user session has no ACL attribute configured, all application requests from that user session are permitted by default.
SUMMARY STEPS

1.    enable

2.    configure terminal

3.    webvpn context name

4.    policy group name

5.    exit

6.    acl acl-name

7.    end


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
webvpn context name


Example:

Device(config)# webvpn context context1

 

Configures the SSL VPN context and enters WebVPN context configuration mode.

 
Step 4
policy group name


Example:

Device(config-webvpn-context)# policy group group1

 

Defines a policy that can be applied to the user and enters WebVPN policy group configuration mode.

 
Step 5
exit


Example:

Device(config-webvpn-group)# exit

 

Exits WebVPN policy group configuration mode.

 
Step 6
acl acl-name


Example:

Device(config-webvpn-context)# acl acl1

 

Defines the ACL and enters WebVPN ACL configuration mode.

 
Step 7
end


Example:

Device(config-webvpn-acl)# end

 

Exists the WebVPN ACL configuration mode and enters the privileged EXEC mode.

 

Monitoring and Maintaining ACLs

SUMMARY STEPS

1.    enable

2.    debug webvpn acl


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
debug webvpn acl


Example:

Device# debug webvpn acl

 

Displays information about ACLs.

 

Configuring SSO Netegrity Cookie Support for a Virtual Context

To configure SSO Netegrity cookie support for a virtual context, perform the following steps.

Before You Begin

Note


A Cisco plug-in must first be installed on a Netegrity server.

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    webvpn context name

4.    sso-server name

5.    web-agent-url url

6.    secret-key key-name

7.    max-retry-attempts number-of-retries

8.    request-timeout number-of-seconds

9.    end


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
webvpn context name


Example:

Device(config)# webvpn context context1

 

Enters WebVPN context configuration mode to configure the SSL VPN context.

 
Step 4
sso-server name


Example:

Device(config-webvpn-context)# sso-server "test-sso-server"

 

Creates an SSO server name under an SSL VPN context and enters WebVPN SSSO server configuration mode.

 
Step 5
web-agent-url url


Example:

Device(config-webvpn-sso-server)# web-agent-url http://www.example.comwebvpn/

 

Configures the Netegrity agent URL to which SSO authentication requests will be dispatched.

 
Step 6
secret-key key-name


Example:

Device(config-webvpn-sso-server)# secret-key "12345"

 

Configures the policy server secret key that is used to secure authentication requests.

 
Step 7
max-retry-attempts number-of-retries


Example:

Device(config-webvpn-sso-server)# max-retry-attempts 3

 

Sets the maximum number of retries before SSO authentication fails.

 
Step 8
request-timeout number-of-seconds


Example:

Device(config-webvpn-sso-server)# request-timeout 15

 

Sets the number of seconds before an authentication request times out.

 
Step 9
end


Example:

Device(config-webvpn-ssso-server)# end

 

Exists the WebVPN SSSO server configuration mode and enters the privileged EXEC mode.

 

Associating an SSO Server with a Policy Group

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    webvpn context name

4.    policy group name

5.    sso-server name

6.    end


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
webvpn context name


Example:

Device(config)# webvpn context context1

 

Configures the SSL VPN context and enters WebVPN context configuration mode.

 
Step 4
policy group name


Example:

Device(config-webvpn-context)# policy group ONE

 

Configures a group policy and enters WebVPN group policy configuration mode.

 
Step 5
sso-server name


Example:

Device(config-webvpn-group)# sso-server "test-sso-server"

 

Attaches an SSO server to a policy group.

 
Step 6
end


Example:

Device(config-webvpn-group)# end

 

Exists the WebVPN group policy configuration mode and enters the privileged EXEC mode.

 

Configuring URL Obfuscation (Masking)

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    webvpn context name

4.    policy group name

5.    mask-urls

6.    end


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
webvpn context name


Example:

Device(config)# webvpn context context1

 

Configures the SSL VPN context and enters WebVPN context configuration mode.

 
Step 4
policy group name


Example:

Device(config-webvpn-context)# policy group ONE

 

Configures a group policy and enters group policy configuration mode.

 
Step 5
mask-urls


Example:

Device(config-webvpn-group)# mask-urls

 

Obfuscates, or masks, sensitive portions of an enterprise URL, such as IP addresses, hostnames, or port numbers.

 
Step 6
end


Example:

Device(config-webvpn-group)# end

 

Exists the WebVPN group policy configuration mode and enters the privileged EXEC mode.

 

Adding a CIFS Server URL List to an SSL VPN Context and Attaching It to a Policy Group

Before You Begin

Before adding a CIFS server URL list to an SSL VPN context, you must have already set up the Web VPN context using the webvpn context command, and you must be in WebVPN context configuration mode.


SUMMARY STEPS

1.    cifs-url-list name

2.    heading text-string

3.    url-text name

4.    end

5.    policy group name

6.    cifs-url-list name

7.    end


DETAILED STEPS
  Command or Action Purpose
Step 1
cifs-url-list name


Example:

Device(config-webvpn-context)# cifs-url-list c1

 

Enters WebVPN URL list configuration mode to configure a list of CIFS server URLs to which a user has access on the portal page of an SSL VPN.

 
Step 2
heading text-string


Example:

Device(config-webvpn-url)# heading "cifs-url"

 

Configures the heading that is displayed above URLs listed on the portal page of an SSL VPN.

 
Step 3
url-text name


Example:

Device(config-webvpn-url)# url-text "SSLVPN-SERVER2" url-value "\\SLVPN-SERVER2"

 

Adds an entry to a URL list.

  • More than one entry can be added by reentering the url-text command for each subsequent entry.
 
Step 4
end


Example:

Device(config-webvpn-url)# end

 

Exits WebVPN URL list configuration mode and returns to WebVPN context configuration mode.

 
Step 5
policy group name


Example:

Device(config-webvpn-context)# policy group ONE

 

Enters WebVPN group policy configuration mode to configure a group policy.

 
Step 6
cifs-url-list name


Example:

Device(config-webvpn-group)# cifs-url-list "c1"

 

Attaches a URL list to a policy group.

 
Step 7
end


Example:

Device(config-webvpn-group)# end

 

Exits WebVPN group policy configuration mode.

 

Configuring User-Level Bookmarks

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    webvpn context name

4.    user-profile location flash: directory

5.    end


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
webvpn context name


Example:

Device(config)# webvpn context context1

 

Configures the SSL VPN context and enters WebVPN context configuration mode.

 
Step 4
user-profile location flash: directory


Example:

Device(config-webvpn-context)# user-profile location flash:webvpn/sslvpn/vpn_context/

 

Stores bookmarks on a directory.

 
Step 5
end


Example:

Device(config-webvpn-context)# end

 

Exists the WebVPN context configuration mode and enters the privileged EXEC mode.

 

Configuring FVRF

To configure FVRF so that the SSL VPN gateway is fully integrated into an MPLS network, perform the following steps.

Before You Begin

As the following configuration task shows, IP VRF must be configured before the FVRF can be associated with the SSL VPN gateway. For more information about configuring IP VRF, see the Configuring IP VRF (ip vrf command) in the Cisco IOS IP Application Services Command Reference section.


SUMMARY STEPS

1.    enable

2.    configure terminal

3.    ip vrf vrf-name

4.    exit

5.    webvpn gateway name

6.    vrfname name

7.    exit


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
ip vrf vrf-name


Example:

Device(config)# ip vrf vrf_1

 

Defines a VPN VRF instance and enters VRF configuration mode.

Note    The vrf-name argument specified here must be the same as the name argument in Step 6.
 
Step 4
exit


Example:

Device(config-vrf)# exit

 

Exits VRF configuration mode.

 
Step 5
webvpn gateway name


Example:

Device(config)# webvpn gateway mygateway

 

Enters WebVPN gateway configuration mode to configure an SSL VPN gateway.

 
Step 6
vrfname name


Example:

Device(config-webvpn-gateway)# vrfname vrf_1

 

Associates a VPN FVRF with an SSL VPN gateway.

Note    The value for the name argument here must be the same as the value for the vrf-name argument in Step 3.
 
Step 7
exit


Example:

Device(config-webvpn-gateway)# exit

 

Exits WebVPN gateway configuration mode.

 

Disabling Full-Tunnel Cisco Express Forwarding


Note


The no webvpn cef command disables all Web VPN Cisco Express Forwarding support, not just full-tunnel Cisco Express Forwarding support.
SUMMARY STEPS

1.    enable

2.    configure terminal

3.    no webvpn cef

4.    exit


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
no webvpn cef


Example:

Device(config)# no webvpn cef

 

Disables full-tunnel Cisco Express Forwarding support.

Note    The webvpn cef command is enabled by default.
 
Step 4
exit


Example:

Device(config-webvpn-group)# exit

 

Exists the WebVPN group policy configuration mode and enters the privileged EXEC mode.

 

Configuring Automatic Authentication and Authorization

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    webvpn context name

4.    aaa authentication auto

5.    aaa authorization list name

6.    exit


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
webvpn context name


Example:

Device(config)# webvpn context context1

 

Enters WebVPN context configuration mode to configure the SSL VPN context.

 
Step 4
aaa authentication auto


Example:

Device(config-webvpn-context)# aaa authentication auto

 

Allows automatic authentication for users.

  • Users provide their usernames and passwords via the gateway page URL and do not have to again enter their usernames and passwords from the login page.
 
Step 5
aaa authorization list name


Example:

Device(config-webvpn-context)# aaa authorization list 11

 

Allows user attributes to get "pushed" during authentication.

  • name --Name of the list to be automatically authorized.
 
Step 6
exit


Example:

Device(config-webvpn-context)# exit

 

Exists the WebVPN context configuration mode and enters the privileged EXEC mode.

 

Configuring SSL VPN Client-Side Certificate-Based Authentication

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    webvpn import svc profile profile-name device-name

4.    webvpn context context-name

5.    authentication certificate aaa

6.    username-prefill

7.    ca trustpoint trustpoint-name

8.    match-certificate certificate-name

9.    policy group policy-name

10.    svc profile profile-name

11.    exit


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
webvpn import svc profile profile-name device-name


Example:

Device(config)# webvpn import svc profile profile1 flash:AnyconnectProfile.tmpl

 

Imports an AnyConnect profile.

 
Step 4
webvpn context context-name


Example:

Device(config)# webvpn context context1

 

Enters WebVPN context configuration mode to configure the SSL VPN context.

 
Step 5
authentication certificate aaa


Example:

Device(config-webvpn-context)# authentication certificate aaa

 

Enables certificate-based AAA authentication.

 
Step 6
username-prefill


Example:

Device(config-webvpn-context)# username-prefill

 

Enables trustpoint configuration to prefill the username field from an authentication certificate.

 
Step 7
ca trustpoint trustpoint-name


Example:

Device(config-webvpn-context)# ca trustpoint trustpoint1

 

Enables the trustpoint to authenticate users using the specified trust point name.

 
Step 8
match-certificate certificate-name


Example:

Device(config-webvpn-context)# match-certificate certificate1

 

Enables certificate map matching.

 
Step 9
policy group policy-name


Example:

Device(config-webvpn-context)# policy group policy3

 

Enters WebVPN group policy configuration mode to configure a WebVPN group policy.

 
Step 10
svc profile profile-name


Example:

Device(config-webvpn-group)# svc profile profile1

 

Enables a WebVPN group policy with an AnyConnect profile.

 
Step 11
exit


Example:

Device(config-webvpn-group)# exit

 

Exits WebVPN group policy mode.

 

Configuring a URL Rewrite Splitter

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    webvpn context name

4.    url rewrite

5.    host host-name

6.    ip ip-address

7.    unmatched-action [direct-access | redirect]

8.    exit


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
webvpn context name


Example:

Device(config)# webvpn context context1

 

Enters WebVPN context configuration mode to configure the SSL VPN context.

 
Step 4
url rewrite


Example:

Device(config-webvpn-context)# url rewrite

 

Allows you to mangle selective URL requests and enters URL rewrite mode.

Note    You must enter either the host command (Step 5) or the ip command (Step 6).
 
Step 5
host host-name


Example:

Device(config-webvpn-url-rewrite)# host www.examplecompany.com

 

Hostname of the site to be mangled.

Note    You must enter either the host command (Step 5) or the ip command (Step 6).
 
Step 6
ip ip-address


Example:

Device(config-webvpn-url-rewrite)# ip 10.1.1.0 255.255.0.0

 

IP address of the site to be mangled.

Note    You must enter either the host command (Step 5) or the ip command (Step 6).
 
Step 7
unmatched-action [direct-access | redirect]


Example:

Device(config-webvpn-url-rewrite)# unmatched-action direct-access

 

(Optional) Defines the action for the request to the public website.

  • direct-access--Provides the user with direct access to the URL. In addition, the user receives an information page stating that he or she can access the URL directly.
  • redirect--Provides the user with direct access to the URL, but the user does not receive the information page.
 
Step 8
exit


Example:

Device(config-webvpn-url-rewrite)# exit

 

Exists the WebVPN URL rewrite mode and enters the privileged EXEC mode.

 

Configuring a Backend HTTP Proxy

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    webvpn context name

4.    policy group name

5.    http proxy-server {ip-address | dns-name} port port-number

6.    exit


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
webvpn context name


Example:

Device(config)# webvpn context context1

 

Enters WebVPN context configuration mode to configure the SSL VPN context.

 
Step 4
policy group name


Example:

Device(config-webvpn-context)# policy group g1

 

Enters WebVPN group policy configuration mode to configure a group policy.

 
Step 5
http proxy-server {ip-address | dns-name} port port-number


Example:

Device(config-webvpn-context)# http proxy-server 10.1.1.1 port 2034

 

Allows user requests to go through a backend HTTP proxy.

  • ip-address --IP address of the proxy server.
  • dns-name --DNS of the proxy server.
  • port port-number --Proxy port number.
 
Step 6
exit


Example:

Device(config-webvpn-group)# exit

 

Exists the WebVPN group policy configuration mode and enters the privileged EXEC mode.

 

Configuring Stateless High Availability with HSRP for SSL VPN

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    interface type slot/port

4.    standby number ip ip-address

5.    standby number name standby-name

6.    exit

7.    webvpn gateway name

8.    ip address number port port-number standby name

9.    exit


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
interface type slot/port


Example:

Device(config)# interface gateway 0/0

 

Configures an interface type and enters interface configuration mode.

 
Step 4
standby number ip ip-address


Example:

Device(config-if)# standby 0 ip 10.1.1.1

 

Configures a standby IP address.

 
Step 5
standby number name standby-name


Example:

Device(config-if)# standby 0 name SSLVPN

 

Configures a standby name.

 
Step 6
exit


Example:

Device(config-if)# exit

 

Exits interface configuration mode.

 
Step 7
webvpn gateway name


Example:

Device(config)# webvpn gateway Gateway1

 

Enters WebVPN gateway configuration mode to configure an SSL VPN gateway.

 
Step 8
ip address number port port-number standby name


Example:

Device(config-webvpn-gateway)# ip address 10.1.1.1 port 443 standby SSLVPN

 

Configures a standby IP address as the proxy IP address on an SSL VPN gateway.

Note    The IP address configured here must be the same as the IP address that was configured as the standby IP address (standby number ip ip-address).
 
Step 9
exit


Example:

Device(config-webvpn-gateway)# exit

 

Exists the WebVPN gateway configuration mode and enters the privileged EXEC mode.

 

Configuring Internationalization

Generating the Template Browser Attribute File

SUMMARY STEPS

1.    enable

2.    webvpn create template browser-attribute device:

3.    Copy the browser attribute file to another device on which you can edit the language being configured.

4.    Copy the edited file back to the storage device.


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
webvpn create template browser-attribute device:


Example:

Device# webvpn create template browser-attribute flash:

 

Generates the browser attribute template XML file (battr_tpl.xml).

 
Step 3
Copy the browser attribute file to another device on which you can edit the language being configured.  

For an example of how to copy the file to your PC, see the "Example: Copying the Browser Attribute File to Another PC for Editing".

 
Step 4
Copy the edited file back to the storage device.  

For an example of how to copy the edited file to a storage device, see the "Example: Copying the Edited File to flash".

 
What to Do Next

Proceed to the "Importing_the_Browser_Attribute_File" section.

Importing the Browser Attribute File

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    webvpn context name

4.    browser-attribute import device:file-name

5.    exit


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
webvpn context name


Example:

Device(config)# webvpn context context1

 

Enters WebVPN context configuration mode to configure the SSL VPN context.

 
Step 4
browser-attribute import device:file-name


Example:

Device(config-webvpn-context)# browser-attribute import flash:battr_tpl.xml

 

Imports the edited browser attribute file from the storage device.

 
Step 5
exit


Example:

Device(config-webvpn-context)# exit

 

Exists the WebVPN context configuration mode and enters the privileged EXEC mode.

 

Verifying That the Browser Attribute File Was Imported Correctly

SUMMARY STEPS

1.    enable

2.    show running-config


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
show running-config


Example:

Device# show running-config

 

Verifies that the browser attribute file was imported correctly.

 
What to Do Next

Proceed to the "Creating_the_Language_File" section.

Creating the Language File

SUMMARY STEPS

1.    enable

2.    webvpn create template language device:

3.    Copy the language lang.js file to a PC for editing.

4.    Copy the edited language lang.js file to the storage device.

5.    webvpn create template language {japanese | customize language-name device:file}


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
webvpn create template language device:


Example:

Device# webvpn create template language flash:

 

Creates the language template file lang.js.

Note    A lang.js file does not have to be created if the language is English or Japanese.
 
Step 3
Copy the language lang.js file to a PC for editing.  

For an example of how to copy the language file to another PC, see the "Example: Copying the Language File to Another PC for Editing".

 
Step 4
Copy the edited language lang.js file to the storage device.  

For an example of how to copy the edited file to the storage device, see the "Example: Copying the Edited Language File to the Storage Device".

 
Step 5
webvpn create template language {japanese | customize language-name device:file}


Example:

Device# webvpn create template language japanese

 

Creates templates for multilanguage support for messages initiated by the headend in an SSL VPN.

 
What to Do Next

Proceed to the "Importing_the_Language_File" section.

Importing the Language File

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    webvpn context name

4.    language {japanese | customize language-name device:file}

5.    exit


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
webvpn context name


Example:

Device# webvpn context context1

 

Enters WebVPN context configuration mode to configure the SSL VPN context.

 
Step 4
language {japanese | customize language-name device:file}


Example:

Device(config-webvpn-context)# language Japanese

 

Imports the language file.

 
Step 5
exit


Example:

Device(config-webvpn-context)# exit

 

Exists the WebVPN context configuration mode and enters the privileged EXEC mode.

 

Verifying That the Language File Was Imported Correctly

SUMMARY STEPS

1.    enable

2.    show running-config

3.    exit


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
show running-config


Example:

Device# show running-config

 

Verifies that the language file was imported correctly.

 
Step 3
exit


Example:

Device# exit

 

Exists the privileged EXEC mode.

 
What to Do Next

Proceed to the "Creating_the_URL_List" section.

Creating the URL List

SUMMARY STEPS

1.    enable

2.    webvpn create template url-list device:

3.    Copy the XML file to a PC for editing.

4.    Copy the edited url-list XML file back to the storage device.

5.    exit


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
webvpn create template url-list device:


Example:

Device# webvpn create template url-list flash:

 

Creates the url-list template.

 
Step 3
Copy the XML file to a PC for editing.  

For an example of how to copy an XML file to a PC for editing, see the Examples URL List.

 
Step 4
Copy the edited url-list XML file back to the storage device.  

For an example of how to copy the edited url-list XML file back to a storage device, see the Examples URL List.

 
Step 5
exit


Example:

Device# exit

 

Exists the privileged EXEC mode.

 

Importing the File into the URL List and Binding It to a Policy Group

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    webvpn context name

4.    url-list name

5.    import device:file

6.    exit

7.    policy group group name

8.    url-list name


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
webvpn context name


Example:

Device(config)# webvpn context context1

 

Enters WebVPN context configuration mode to configure the SSL VPN context.

 
Step 4
url-list name


Example:

Device(config-webvpn-context)# url-list testlist

 

Enters WebVPN URL list configuration mode to configure a list of URLs to which a user has access on the portal page of an SSL VPN and attaches the URL list to a policy group.

 
Step 5
import device:file


Example:

Device(config-webvpn-url)# import flash:testlist

 

Imports the user-defined URL list.

 
Step 6
exit


Example:

Device(config-webvpn-url)# exit

 

Exits WebVPN URL list configuration mode.

 
Step 7
policy group group name


Example:

Device(config-webvpn-context)# policy group policygroup1

 

Enters WebVPN group policy configuration mode to configure a group policy.

 
Step 8
url-list name


Example:

Device(config-webvpn-group)# url-list testlist

 

Binds the URL list to the policy group.

 

Verifying That the URL List File Was Bound Correctly to the Policy Group

SUMMARY STEPS

1.    enable

2.    show running-config

3.    exit


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
show running-config


Example:

Device# show running-config

 

Verifies that the url-list file was bound correctly to the policy group.

 
Step 3
exit


Example:

Device# exit

 

Exists the privileged EXEC mode.

 

Configuring a Virtual Template

A virtual template enables SSL VPN to interoperate with IP features such as NAT, firewall, and policy-based routing.

Before You Begin
  • SSL VPN gateway and context configurations are enabled and operational.
  • If a VRF is needed, configure it before creating the virtual template.
  • If the virtual template is to be associated with a firewall security zone, create the security zone before creating the virtual template.

Note


In order for a virtual template to work with SSL VPN, you must configure theip unnumbered command on the virtual template.

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    interface virtual-template number

4.    ip unnumbered type number

5.    exit

6.    webvpn context name

7.    virtual-template number

8.    exit

9.    show webvpn context [name]


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
interface virtual-template number


Example:

Device(config)# interface virtual-template 200

 

Creates an interface for the virtual template and enters interface configuration mode.

 
Step 4
ip unnumbered type number


Example:

Device(config-if)# ip unnumbered GigabitEthernet 0/0

 

Enables IP processing on an interface without assigning an explicit IP address to the interface.

  • The type and number arguments specify another interface on which the switch has an assigned IP address. The interface specified cannot be another unnumbered interface.
 
Step 5
exit


Example:

Device(config-if)# exit

 

Exits interface configuration mode.

 
Step 6
webvpn context name


Example:

Device(config)# webvpn context context1

 

Enters WebVPN context configuration mode to configure the SSL VPN context.

 
Step 7
virtual-template number


Example:

Device(config-webvpn-context)# virtual-template 200

 

Associates a virtual template with an SSL VPN context.

 
Step 8
exit


Example:

Device(config-webvpn-context)# exit

 

Exists the WebVPN context configuration mode.

 
Step 9
show webvpn context [name]


Example:

Device# show webvpn context context1

 

Verifies that the virtual template is configured correctly.

 

Configuring SSL VPN DVTI Support

Configuring per-Tunnel Virtual Templates

Perform this task to configure per-tunnel virtual templates. This task describes how to provide DVTI support for an SSL VPN.

A virtual template is configured with the desired IP features. This virtual template is configured in a WebVPN context on a per-tunnel or per-user basis (because a user will have only one tunnel established at a time). Hence the virtual template configuration is applied on a per-tunnel basis for each SSL VPN full tunnel established in the WebVPN context. This configuration also helps you apply a distinct configuration to each user connecting to the WebVPN context using a AAA server.

The distinct per-user policy configuration is downloaded from the AAA server. This configuration includes group policy attributes and ACLs, and is applied to every user connecting to the WebVPN context on a per-user basis.

If a per-user attribute such as ACL is configured both on the AAA server and the virtual template, then the attribute configured on the AAA server takes precedence. The users logged in to the client computer will have the ACL configuration from the AAA server but will have other configurations, such as firewalls and VRF, from the virtual template. That is, the configuration applied to the users will be a combination of the virtual template configuration and the configuration available on the AAA server.

For example, if IP features such as firewalls, ACLs, and VRF are configured in a virtual template and user attributes such as ACLs are configured on the AAA server, the attributes configured on the AAA server take precedence. The users logged in to the client computer will have the ACL configuration from the AAA server but will have firewall and VRF configurations from the virtual template. That is, the configuration applied to the users will be a combination of virtual templates and AAA, where AAA attributes have a higher priority when there is a configuration conflict.

See the "Configuring_RADIUS_Attribute_Support_for_SSL_VPN" section for a list of AAA attributes that support SSL VPN.

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    webvpn context context-name

4.    virtual-template interface-number tunnel

5.    inservice

6.    exit


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
webvpn context context-name


Example:

Device(config)# webvpn context context1

 

Enters WebVPN context configuration mode to configure the SSL VPN context.

 
Step 4
virtual-template interface-number tunnel


Example:

Device(config-webvpn-context)# virtual-template 1 tunnel

 

Associates virtual templates for each full tunnel session.

 
Step 5
inservice


Example:

Device(config-webvpn-context)# inservice

 

Enables an SSL VPN context.

Note    If a context is already configured and enabled, then you must disable the context using the no inservice command, specify the virtual template using the virtual-template interface-number command, and then enable the SSL VPN context using the inservice command.
 
Step 6
exit


Example:

Device(config-webvpn-context)# exit

 

Exits WebVPN context configuration mode.

 
Troubleshooting Tips

Use the following commands to debug any errors that you may encounter when you configure the per-Tunnel Virtual Templates:

  • debug vtemplate {cloning | error | event}
  • debug webvpn tunnel

Configuring per-Context Virtual Templates

This task describes how to configure virtual tunnel interface support on a per-context basis.

A virtual template is configured with IP features such as NAT, firewalls, and PBR. This virtual template is configured in a WebVPN context, and enables SSL VPN to interoperate with the IP features configured. This configuration is applied to all users connecting to that WebVPN context.

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    webvpn context context-name

4.    virtual-template interface-number

5.    inservice

6.    exit


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
webvpn context context-name


Example:

Device(config)# webvpn context context1

 

Enters WebVPN context configuration mode to configure the SSL VPN context.

 
Step 4
virtual-template interface-number


Example:

Device(config-webvpn-context)# virtual-template 1

 

Associates a virtual template with an SSL VPN context.

 
Step 5
inservice


Example:

Device(config-webvpn-context)# inservice

 

Enables an SSL VPN context.

Note    If a context is already configured and enabled, then you must disable the context using the no inservice command, specify the virtual template using the virtual-template interface-number command, and then enable the SSL VPN context using the inservice command.
 
Step 6
exit


Example:

Device(config-webvpn-context)# exit

 

Exits WebVPN context configuration mode.

 
Troubleshooting Tips

Use the following commands to debug any errors that you may encounter when you configure the per-Context Virtual Templates:

  • debug vtemplate {cloning | error | event}
  • debug webvpn tunnel

Configuring SSL VPN Phase-4 Features

Configuring the Start Before Logon Functionality

In order to import the AnyConnect profile to the Cisco IOS headend, the administrator must download the AnyConnect profile from an AnyConnect client (this profile comes by default with AnyConnect), update the UseStartBeforeLogin XML tag available in the profile file to inform AnyConnect to support SBL, and then import the modified profile into the Cisco IOS software.

The secure gateway administrator maintains the AnyConnect profile file and distributes it to the clients.

Following is an extract of the Cisco IOS AnyConnect VPN client profile XML file:

<?xml version="1.0" encoding="UTF-8"?>
<AnyConnectProfile xmlns="http://schemas.xmlsoap.org/encoding/"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://schemas.xmlsoap.org/encoding/
AnyConnectProfile.xsd">
<ClientInitialization>
<UseStartBeforeLogon UserControllable="false">true</UseStartBeforeLogon>
</ClientInitialization>

You can select the hosts from the above list.

<ServerList>
  <HostEntry>
    <HostName>abc</HostName>
    <HostAddress>abc.cisco.com</HostAddress>
  </HostEntry> </ServerList>
</AnyConnectProfile>

Data is required to connect to a specific host.

The SBL functionality connects the client PC to the enterprise network even before the users log into the PC. This functionality allows the administrator to run the logon scripts even if the user is not connected to the enterprise network. This is useful for a number of deployment scenarios where the user is outside the physical corporate network and cannot access the resources until his system is connected to the corporate network.

Only an administrator can enable or disable SBL. The end users accessing the client PC are not allowed to enable or disable this functionality.

Before You Begin

SSL VPN must have the ability to import profiles on the Cisco IOS software and must be able to send the AnyConnect profile to the client.


SUMMARY STEPS

1.    enable

2.    configure terminal

3.    webvpn import svc profile profile-name device-name

4.    webvpn context context-name

5.    policy group group-name

6.    svc profile profile-name

7.    svc module module-name

8.    end

9.    show running-config


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
webvpn import svc profile profile-name device-name


Example:

Device(config)# webvpn import svc profile profile1 flash:newName

 

Imports the AnyConnect profile to the Cisco IOS headend.

 
Step 4
webvpn context context-name


Example:

Device(config)# webvpn context context1

 

Enters WebVPN context configuration mode to configure the SSL VPN context.

 
Step 5
policy group group-name


Example:

Device(config-webvpn-context)# policy group group1

 

Enters WebVPN group policy configuration mode to configure a group policy.

 
Step 6
svc profile profile-name


Example:

Device(config-webvpn-group)# svc profile profile1

 

Applies the concerned profile to the respective WebVPN group policy.

 
Step 7
svc module module-name


Example:

Device(config-webvpn-group)# svc module vpngina

 

Enables the SBL functionality support for the Cisco IOS SSL VPN headend.

Note    Only the vpngina SVC module is supported.
 
Step 8
end


Example:

Device(config-webvpn-group)# end

 

Exits WebVPN group policy configuration mode.

Note    You must restart your system for the SBL functionality to take effect.
 
Step 9
show running-config


Example:

Device# show running-config

 

(Optional) Displays the contents of the current running configuration file or the configuration for a specific module, Layer 2 VLAN, class map, interface, map class, policy map, or virtual circuit (VC) class.

 
Troubleshooting Tips

Use the debug webvpn cookie command to debug any errors that you may encounter when you configure the SBL functionality.

Configuring Split ACL Support

Perform this task to configure split ACL support.

When the tunnel is active, Cisco IOS SSL VPN supports the split include and split exclude commands to filter and classify the traffic based on IP. Because the Cisco IOS software supports ACLs to classify the traffic, standard ACL support is provided to filter the traffic.

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    ip access-list standard {access-list-number | access-list-name}

4.    permit ip-address

5.    deny ip-address

6.    exit

7.    webvpn context context-name

8.    policy group policy-name

9.    svc split {include | exclude} acl acl-list-name

10.    end

11.    show running-config


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
ip access-list standard {access-list-number | access-list-name}


Example:

Device(config)# ip access-list standard 1

 

Defines an IP access list or object group access control list (OGACL) by name or number and enters the standard ACL configuration mode.

 
Step 4
permit ip-address


Example:

Device(config-std-nacl)# permit 10.0.0.1

 

Sets conditions to allow packets to pass a named SSL VPN access list.

Note    You can use the permit and deny commands in any combination, as required.
 
Step 5
deny ip-address


Example:

Device(config-std-nacl)# deny 10.0.0.2

 

Sets conditions in a named SSL VPN access list that will deny packets.

Note    You can use the permit and deny commands in any combination, as required.
 
Step 6
exit


Example:

Device(config-std-nacl)# exit

 

Exits standard ACL configuration mode.

 
Step 7
webvpn context context-name


Example:

Device(config)# webvpn context context1

 

Enters WebVPN context configuration mode to configure the SSL VPN context.

 
Step 8
policy group policy-name


Example:

Device(config-webvpn-context)# policy group default

 

Enters WebVPN group policy configuration mode to configure a group policy.

 
Step 9
svc split {include | exclude} acl acl-list-name


Example:

Device(config-webvpn-group)# svc split include acl 1

 

Enables split tunneling for Cisco AnyConnect VPN Client tunnel clients.

 
Step 10
end


Example:

Device(config-webvpn-group)# end

 

Exits WebVPN group policy configuration mode.

 
Step 11
show running-config


Example:

Device# show running-config

 

(Optional) Displays the contents of the current running configuration file or the configuration for a specific module, Layer 2 VLAN, class map, interface, map class, policy map, or virtual circuit (VC) class.

 

Configuring IP NetMask Functionality

The IP NetMask functionality provides SVC or AnyConnect client provision to configure the network mask when the ip local pool command is configured on the router. This mask must be a classless mask.

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    webvpn context context-name

4.    policy group group-name

5.    svc address-pool pool-name netmask ip-netmask

6.    end

7.    show running-config


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
webvpn context context-name


Example:

Device(config)# webvpn context context1

 

Enters WebVPN context configuration mode to configure the SSL VPN context.

 
Step 4
policy group group-name


Example:

Device(config-webvpn-context)# policy group default

 

Enters WebVPN group policy configuration mode to configure a group policy.

 
Step 5
svc address-pool pool-name netmask ip-netmask


Example:

Device(config-webvpn-group)# svc address-pool pool1 netmask 255.255.0.0

 

Configures the desired netmask on the router.

 
Step 6
end


Example:

Device(config-webvpn-group)# end

 

Exits WebVPN group policy configuration mode.

 
Step 7
show running-config


Example:

Device# show running-config

 

(Optional) Displays the contents of the current running configuration file or the configuration for a specific module, Layer 2 VLAN, class map, interface, map class, policy map, or virtual circuit (VC) class.

 

Configuring the DTLS Port

DTLS listens on port 443 by default. Perform this task to configure the desired DTLS port.

SUMMARY STEPS

1.    enable

2.   configure terminal

3.   webvpn gateway gateway-name

4.   dtls port port-number

5.   end

6.   show webvpn session [user user-name] context {context-name | all} [detail]


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 
Enables privileged EXEC mode.
  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
webvpn gateway gateway-name


Example:

Device(config)# webvpn gateway gateway1

 

Enters WebVPN gateway configuration mode to configure a SSL VPN gateway.

 
Step 4
dtls port port-number


Example:

Device(config-webvpn-gateway)# dtls port 1045

 

Configures a DTLS port.

 
Step 5
end


Example:

Device(config-webvpn-gateway)# end

 

Exits WebVPN gateway configuration mode.

 
Step 6
show webvpn session [user user-name] context {context-name | all} [detail]


Example:

Device# show webvpn session context all

 

(Optional) Displays SSL VPN user session information.

 

Troubleshooting Tips

The debug webvpn dtls [errors | events | packets] command can help troubleshoot IOS SSL VPN DTLS support.

Using SSL VPN clear Commands

This section describes clear commands that are used to perform the following tasks:

  • Clear NBNS cache information
  • Clear remote user sessions
  • Clear (or reset) SSL VPN application and access counters
SUMMARY STEPS

1.    enable

2.    clear webvpn nbns [context {name | all}]

3.    clear webvpn session [user name] context {name | all}

4.    clear webvpn stats [cifs | citrix | mangle | port-forward | sso | tunnel] [context {name | all}]


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
clear webvpn nbns [context {name | all}]


Example:

Device# clear webvpn nbns context all

 

Clears the NBNS cache on an SSL VPN gateway.

 
Step 3
clear webvpn session [user name] context {name | all}


Example:

Device# clear webvpn session context all

 

Clears SSL VPN remote user sessions.

 
Step 4
clear webvpn stats [cifs | citrix | mangle | port-forward | sso | tunnel] [context {name | all}]


Example:

Device# clear webvpn stats

 

Clears SSL VPN application and access counters.

 

Verifying SSL VPN Configurations

This section describes how to use show commands to verify the following:

  • SSL VPN gateway configuration
  • SSL VPN context configuration
  • CSD and Cisco AnyConnect VPN Client installation status
  • NetBIOS name services information
  • SSL VPN group policy configuration
  • SSL VPN user session information
  • SSL VPN application statistics
  • SSL VPN DVTI Support configuration
SUMMARY STEPS

1.    enable

2.    show webvpn context [name]

3.    show webvpn gateway [name]

4.    show webvpn nbns context {all | name}

5.    show webvpn policy group name context {all | name}

6.    show webvpn session [user name] context {all | name}

7.    show webvpn stats [cifs | citrix | mangle | port-forward | sso | tunnel] [detail] [context {all | name}]

8.    show webvpn context [context-name | brief]

9.    show interface virtual-access interface-number

10.    show webvpn session [user user-name] context {context-name | all} [detail]

11.    show running-config interface virtual-access interface-number


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
show webvpn context [name]


Example:

Device# show webvpn context

 

Displays the operational status and configuration parameters for SSL VPN context configurations.

 
Step 3
show webvpn gateway [name]


Example:

Device# show webvpn gateway

 

Displays the status of the SSL VPN gateway.

 
Step 4
show webvpn nbns context {all | name}


Example:

Device# show webvpn nbns context all

 

Displays information in the NBNS cache.

 
Step 5
show webvpn policy group name context {all | name}


Example:

Device# show webvpn policy group ONE context all

 

Displays the context configuration associated with a policy group.

 
Step 6
show webvpn session [user name] context {all | name}


Example:

Device# show webvpn session context all

 

Displays SSL VPN user session information.

 
Step 7
show webvpn stats [cifs | citrix | mangle | port-forward | sso | tunnel] [detail] [context {all | name}]


Example:

Device# show webvpn stats tunnel detail context all

 

Displays SSL VPN application and network statistics.

 
Step 8
show webvpn context [context-name | brief]


Example:

Device# show webvpn context brief

 

(Optional) Displays the operational status and configuration parameters for SSL VPN context configurations.

 
Step 9
show interface virtual-access interface-number


Example:

Device# show interface virtual-access 1

 

(Optional) Displays detailed information about the virtual access interface.

 
Step 10
show webvpn session [user user-name] context {context-name | all} [detail]


Example:

Device# show webvpn session user user1 context all

 

(Optional) Displays SSL VPN user session information.

 
Step 11
show running-config interface virtual-access interface-number


Example:

Device# show running-config interface virtual-access 1

 

(Optional) Displays the configuration applied on the virtual access interface.

 

Using SSL VPN Debug Commands

To monitor and manage your SSL VPN configurations, perform the following steps.

SUMMARY STEPS

1.    enable

2.    debug webvpn [verbose] [aaa | acl | cifs | citrix [verbose] | cookie [verbose] | count | csd | data | dns | emweb [state] | entry context-name [source ip[network-mask] | user username] | http [authentication | trace | verbose] | package | sdps [level number] | sock [flow] | sso| timer | trie | tunnel [traffic acl-number | verbose] | url-disp | webservice [verbose]]


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
debug webvpn [verbose] [aaa | acl | cifs | citrix [verbose] | cookie [verbose] | count | csd | data | dns | emweb [state] | entry context-name [source ip[network-mask] | user username] | http [authentication | trace | verbose] | package | sdps [level number] | sock [flow] | sso| timer | trie | tunnel [traffic acl-number | verbose] | url-disp | webservice [verbose]]


Example:

Device# debug webvpn

 

Enables the display of debug information for SSL VPN applications and network activity.

 

Configuration Examples for SSL VPN

Example: Configuring a Generic SSL VPN Gateway

The following output example shows how to configure a generic SSL VPN gateway in privileged EXEC mode:

webvpn gateway SSL_gateway2
 ip address 10.1.1.1. port 442
 ssl trustpoint TP_self_signed _4138349635
 inservice
!
webvpn context SSL_gateway2
 ssl authenticate verify all
!
!
policy group default
default-group-policy default
 gateway SSL_gateway2
inservice

Example: Configuring an ACL

The following output example shows how to associate acl1 (ACL) with policy group "default."

webvpn context context1
 ssl authenticate verify all
 !
 acl "acl1"
   error-msg "warning!!!..."
   permit url "http://www.example1.com"
   deny url "http://www.example2.com"
   permit http any any
 !
 nbns-list l1
   nbns-server 10.1.1.20
 !
 cifs-url-list "c1"
   heading "cifs-url"
   url-text "SSL VPN-SERVER2" url-value "\\SSL VPN-SERVER2"
   url-text "SSL-SERVER2" url-value "\\SSL-SERVER2"
 !
 policy group default
   acl "acl1"
   cifs-url-list "c1"
   nbns-list "l1"
   functions file-access
   functions file-browse
   functions file-entry
 default-group-policy default
 gateway public
 inservice
!

Example: Configuring HTTP Proxy

The following output example shows how to configure HTTP proxy and how to automatically download the home page of the user from the portal (home) page of "http://www.example.com":

webvpn context myContext
 ssl authenticate verify all
 !
 !
 port-forward "email"
   local-port 20016 remote-server "ssl-server1.SSL example1.com" remote-port 110 description "POP-ssl-server1"
 !
 policy group myPolicy
   port-forward "email" auto-download http-proxy proxy-url "http://www.example.com"
 inservice

Example: Configuring Microsoft File Shares for Clientless Remote Access

NBNS Server List Example

The following output example, starting in global configuration mode shows how to configure a server list for NBNS resolution:

Device(config)# webvpn context context1
Device(config-webvpn-context)# nbns-list SERVER_LIST
Device(config-webvpn-nbnslist)# nbns-server 172.16.1.1 master
Device(config-webvpn-nbnslist)# nbns-server 172.16.2.2 timeout 10 retries 5
Device(config-webvpn-nbnslist)# nbns-server 172.16.3.3 timeout 10 retries 5
Device(config-webvpn-nbnslist)# exit 

File Share Permissions Example

The following output example shows how to attach the server list to and enable full file and network access permissions for the policy group ONE:

Device(config-webvpn-context)# policy group ONE 
Device(config-webvpn-group)# nbns-list SERVER_LIST
Device(config-webvpn-group)# functions file-access
Device(config-webvpn-group)#  functions file-browse
Device(config-webvpn-group)# functions file-entry 
Device(config-webvpn-group)# end 

Example: Configuring Citrix Application Support for Clientless Remote Access

The following output example, starting in global configuration mode, shows how to enable Citrix application support for remote users with a source IP address in the 192.168.1.0/24 network:

Device(config)# access-list 100 permit ip 192.168.1.0 0.255.255.255 any
Device(config)# webvpn context context1
Device(config-webvpn-context)# policy group ONE
Device(config-webvpn-group)# citrix enabled
Device(config-webvpn-group)# filter citrix 100

Example: Configuring Application Port Forwarding

The following output example, starting in global configuration mode, shows how to configure port forwarding for well-known e-mail application port numbers:

Device(config)# webvpn context context1 
Device(config-webvpn-context)# port-forward EMAIL 
Device(config-webvpn-port-fwd)# local-port 30016 remote-server mail1.company.com remote-port 110 description POP3
Device(config-webvpn-port-fwd)# local-port 30017 remote-server mail2.company.com remote-port 25 description SMTP
Device(config-webvpn-port-fwd)# local-port 30018 remote-server mail3.company.com remote-port 143 description IMAP 
Device(config-webvpn-port-fwd)# exit
Device(config-webvpn-context)# policy group ONE 
Device(config-webvpn-group)# port-forward EMAIL
Device(config-webvpn-group)# end

Example: Configuring VRF Virtualization