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Table Of Contents
Cisco PIX Firewall Release Notes Version 6.3(3)
Maximum Recommended Configuration File Size
Cisco VPN Software Interoperability
Cisco VPN Client Interoperability
Cisco Easy VPN Remote Interoperability
Cisco Easy VPN Server Interoperability
Determining the Software Version
Upgrading to a New Software Release
New Features in Release 6.3(3)
PIX Outbound/Conduit Conversion Tool
New Features in Release 6.3(2)
Ability to Configure TFTP Fixup
Support for Instant Messaging Using SIP
Enhanced Show Failover Command
Incomplete Crypto Map Enhancements
Infinite Isakmp Phase 1 Lifetime Support
Enhanced Fixup Protocol Command
New Features in Release 6.3(1)
Enterprise-Class Security Enhancements
Virtual LAN (VLAN)-based virtual interfaces
Secure HyperText Transfer Protocol (HTTPS) Authentication Proxy
Local User Authentication Database for Network and VPN Access
HTTPS and FTP Web Request Filtering via Enhanced Websense Integration
Advanced Encryption Standard (AES)
Support for VPN Accelerator Card+ (VAC+)
DHCP Server Support on Multiple Interfaces
Diffie-Hellman (DH) Group 5 Support
Verify Certificate Distinguished Name
Cryptographic Engine Known Answer Test (KAT)
Media Access Control (MAC) Based Authentication
Small Office, Home Office (SOHO) Enhancements
Increased Firewall Performance on the PIX 501 and PIX 506E Security Appliances
Increased Number of IPSec VPN Peers Supported on the PIX 501 Security Appliance
Unlimited User License for the PIX 501 Security Appliance
Easy VPN Server Load Balancing Support
Dynamic Downloading of Backup Easy VPN Server Information
Easy VPN Internet Access Policy
Custom Backup Concentrator Timeout
Easy VPN X.509 Certificate Support
Flexible Easy VPN Management Solutions
Easy VPN Web Interface for Manual Tunnel Control User Authentication and Tunnel Status
Security Fixups (Application Inspection) Enhancements
Assignable Syslog Levels by Message
Comments/Remarks in Access Control Lists (ACLs)
Interface Name as Address in ACLs
Custom Administrative Access Banner Messages
Console Connection Inactivity Timeout
Remote Management Enhancements
Increase Length of the PIX Firewall Host Name
Enhanced debug Command and Support
Modification to GE Hardware Speed Settings
Important Notes in Release 6.3(3)
Readme Document for the Conduits and Outbound List Conversion Tool 1.2
Important Notes in Release 6.3(2)
Important Notes in Release 6.3
ACL Source Address Change When an Alias is Configured
Interface Settings on the PIX 501 and PIX 506E
Upgrading the PIX 506 and the PIX 515
Easy VPN Remote and Easy VPN Server
Resolved Caveats - Release 6.3(3)
Software Configuration Tips on the Cisco TAC Home Page
Obtaining Documentation and Submitting a Service Request
Cisco PIX Firewall Release Notes Version 6.3(3)
August 2003
Contents
This release is mainly to fix the Network Address Translation (NAT) ID rules caveat (CSCeb84163). This document includes the following sections:
Note
For more information on the NAT ID rules caveat refer to "Important Notes" in the Cisco PIX Firewall Release Notes Version 6.3(2).
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Introduction
The PIX Firewall delivers unprecedented levels of security, performance, and reliability, including robust, enterprise-class security services such as the following:
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Additionally, PIX Firewall Version 6.3 software supports Cisco PIX Device Manager (PDM) Version 3.0 and adds enhancements to features introduced in earlier releases.
System Requirements
The sections that follow list the system requirements for operating a PIX Firewall with Version 6.3 software.
Memory Requirements
The PIX 501 has 16 MB of RAM and will operate correctly with Version 6.1(1) and higher, while all other
PIX Firewall platforms continue to require at least 32 MB of RAM (and therefore are also compatible with version 6.1(1) and higher).In addition, all units except the PIX 501 and PIX 506E require 16 MB of Flash memory to boot. (The PIX 501 and PIX 506E have 8 MB of Flash memory, which works correctly with Version 6.1(1) and higher.)
Table 1 lists Flash memory requirements for this release.
Use the PIX-1GE-66 card in systems with a 64-bit/66 MHz PCI bus; for example, in a PIX 535. (If you use the PIX-1GE-66 cards in a PIX Firewall, the system RAM should be at least 128 MB.) For a PIX Firewall with only a 32-bit/33 MHz bus, such as the PIX 520 and PIX 525, use the PIX-1GE card.
Software Requirements
Version 6.3 requires the following:
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http://www.cisco.com/pcgi-bin/Software/FormManager/formgenerator.pl?pid=221&fid=324
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Maximum Recommended Configuration File Size
For the PIX 525 and PIX 535, the maximum configuration file size limit is increased to 2 MB for PIX Firewall software Versions 5.3(2) and later. For other PIX Firewall platforms, the maximum configuration file size limit is 1 MB. Earlier versions of the PIX 501 are limited to a 256 KB configuration file size. If you are using PIX Device Manager (PDM), we recommend no more than a 100 KB configuration file because larger configuration files can interfere with the performance of PDM on your workstation.
While configuration files up to 2 MB are now supported on the PIX 525 and PIX 535, be aware that such large configuration files can reduce system performance. For example, a large configuration file is likely to noticeably slow execution times in the following situations:
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The optimal configuration file size for use with PDM is less than 100 KB (which is approximately 1500 lines). Please take these considerations into account when planning and implementing your configuration.
Cisco VPN Software Interoperability
Cisco VPN Client Interoperability
Cisco Easy VPN Remote Interoperability
Cisco Easy VPN Server Interoperability
Determining the Software Version
Use the show version command to verify the software version of your PIX Firewall .
Upgrading to a New Software Release
If you have a Cisco Connection Online (CCO) login, you can obtain software from the following website:
http://www.cisco.com/public/sw-center/index.shtml
New and Changed Information
New Features in Release 6.3(3)
This release is mainly to fix the Network Address Translation (NAT) ID rules caveat (CSCeb84163). The new feature in Release 6.3(3) is:
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PIX Outbound/Conduit Conversion Tool
Beginning with Version 5.3, the PIX Firewall uses access lists to control connections between inside and outside networks. Access lists are implemented with the access-list and access-group commands. These commands are used instead of the conduit and outbound commands, which were used in earlier versions of PIX Firewall software. In major software releases after Version 6.3, the conduit and outbound commands are no longer supported. To migrate an obsolete PIX configuration file that contains conduit and outbound commands to a supported configuration file that contains the equivalent access-list commands, a tool is available to help with the conversion process:
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New Features in Release 6.3(2)
The new features in Release 6.3(2) are:
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Policy NAT
PIX Firewall Version 6.3(2) introduces Policy Network Address Translation (NAT). Policy NAT allows you to identify both the source and destination addresses in an access list when specifying the local traffic to translate. This feature lets you use different global addresses for each source and destination pair on an interface, even if the source address is the same for each pair. Without policy NAT, you can only specify a single global address for a given source address, because the destination address is not considered. To configure policy NAT, use either the static or nat commands.
For configuration information, refer to "Policy NAT" or "Enabling Server Access with Static NAT" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax, refer to the Cisco PIX Firewall Command Reference.
Ability to Configure TFTP Fixup
Ability to configure TFTP fixup inspects the TFTP protocol and dynamically creates connection and xlate, if necessary, to permit file transfer between a TFTP client and server. Specifically, the fixup inspects TFTP read request (RRQ), write request (WRQ), and error notification (ERROR).
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For more information on this feature, refer to "TFTP" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
DNS Fixup
The [no] fixup protocol dns [maximum-length <512-65535>] command can be used to enable/disable the DNS fixup.
Based on this maximum-length configured by the user, the DNS fixup checks to see if the DNS packet length is within this limit. Every UDP DNS packet (request/response) undergoes the above check.
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This feature is added to the fixup protocol command in the PIX Firewall Version 6.3(2) software. For configuration information, refer to "DNS" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
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MIB Support
PIX Firewall Version 6.3(2) adds support to the following additional interface objects of MIB-II:
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For more information, refer to "MIB Support" in the Cisco PIX Firewall and VPN Configuration Guide.
Support for Instant Messaging Using SIP
Fixup SIP now supports the Instant Messaging (IM) Chat feature on Windows XP using Windows Messenger RTC Client version 4.7.0105 only.
This feature support is added to the PIX Firewall Version 6.3(2) software. For more information, refer to "SIP"in the Cisco PIX Firewall and VPN Configuration Guide.
Enhanced Show Failover Command
This new feature enhances the show failover command to display the last occurrence of a failover.
For more information on this feature, refer to "Using the Failover Command" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
Incomplete Crypto Map Enhancements
Every static crypto map must define an access list and an IPSec peer. If either is missing, the crypto map is considered incomplete and a warning message is printed. Traffic not matched to a complete crypto map is skipped, and the next entry is tried. Failover hello packets are now exempt from the incomplete crypto map check; previously they were dropped. Use the show conf command to ensure that every crypto map is complete.
For more information on this feature, refer to "Crypto Maps" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
Infinite Isakmp Phase 1 Lifetime Support
Infinite isakmp phase 1 lifetime is a feature that allows interoperatability with third party VPN vendor gateways that do not support rekeying of the IKE phase 1 SA. To enable it, specify a lifetime value of 0 using the isakmp policy command.
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For more information on this feature, refer to "Internet Key Exchange (IKE)" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
Enhanced Show Version Command
The 'show ver' output now has two interface-related lines, Max Physical interfaces and Max interfaces. Max interfaces is the total physical and virtual interfaces. Following is an example of the output:
pix-1(config)# sh verCisco PIX Firewall Version 6.3(2)Compiled on Tue 08-Jul-03 10:56 by dramnathdramnath-pix-1 up 2 hours 51 minsHardware: PIX-515, 32 MB RAM, CPU Pentium 200 MHzFlash i28F640J5 @ 0x300, 16MBBIOS Flash AT29C257 @ 0xfffd8000, 32KB0:ethernet0:address is 0003.e300.1552, irq 101:ethernet1:address is 0003.e300.1553, irq 7
2:ethernet2:address is 0090.273a.1611, irq 11Licensed Features:Failover: DisabledVPN-DES: EnabledVPN-3DES-AES: EnabledMaximum Physical Interfaces:3Maximum Interfaces: 5Cut-through Proxy: EnabledGuards: EnabledURL-filtering: EnabledInside Hosts: UnlimitedThroughput: UnlimitedIKE peers: UnlimitedThis PIX has a Restricted (R) license.Serial Number:5 (0x5)Running Activation Key:0x2b2bcadc 0xbff80f39 0x71c6c743 0xa06ee021Configuration last modified by enable_15 at 20:14:25.505 UTC Thu Jul 24 2003dramnath-pix-1(config)#For more information on this feature, refer to the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
Per-user-override
This feature allows users to specify a new keyword per-user-override to the access-group command. When this keyword is specified, it allows the permit/deny status from the per-user access-list (downloaded via AAA authentication) that is associated to a user to override the permit/deny status from the access-group access-list.
For more information on this feature, refer to the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
Enhanced Fixup Protocol Command
By default, the fixup protocol ils command is disabled. You can use the fixup protocol command to enable the ILS fixup and, optionally, change the default port assignment.
For more information on this feature, refer to "ILS and LDAP" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
Enhanced aaa proxy-limit
When the aaa proxy-limit is set to 16, the "aaa proxy-limit 16" line shows up. This feature specifies the number of concurrent proxy connections allowed per user, from 1 to 128. The default value is 16.
For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
New Features in Release 6.3(1)
This section includes the following topics:
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Enterprise-Class Security Enhancements
Virtual LAN (VLAN)-based virtual interfaces
802.1Q VLAN support comes to the PIX Firewall, providing added flexibility in managing and provisioning the firewall. This feature enables the decoupling of IP interfaces from physical interfaces (hence making it possible to configure logical IP interfaces independent of the number of interface cards installed), and supplies appropriate handling for IEEE 802.1Q tags.
VLAN feature support is added to the interface command in the PIX Firewall Version 6.3 software. For configuration information, refer to "Configuring PIX Firewall with VLANs" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for these new commands, refer to the Cisco PIX Firewall Command Reference.
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OSPF Dynamic Routing
Route propagation and greatly reduced route convergence times are two of the many benefits that arrive with Open shortest Path First (OSPF). The PIX Firewall implementation will support intra-area, inter-area and external routes. The distribution of static routes to OSPF processes and route redistribution between OSPF processes are also included.
To configure OSPF routing on the PIX Firewall, refer to "Configuring OSPF in the PIX Firewall" in the Cisco PIX Firewall and VPN Configuration Guide. The following new commands are added to the PIX Firewall Version 6.3 software to support OSPF routing: routing interface, router ospf, route-map, prefix-list, and so on. For a complete description of the command syntax for these new commands, refer to the Cisco PIX Firewall Command Reference.
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Secure HyperText Transfer Protocol (HTTPS) Authentication Proxy
This new feature extends the capabilities of the PIX Firewall to securely authenticate HTTP sessions and adds support for HTTPS Authentication Proxy. To configure secure authentication of HTTP sessions, use the aaa authentication secure-http-client command. To configure secure authentication of HTTPS sessions, use the aaa authentication include https or the aaa authentication include tcp/0 command.
In PIX Firewall software prior to 6.3, configurations that include the aaa authentication include tcp/0 command will inherit the HTTPS Authentication Proxy feature, which is enabled by default with a code upgrade to Version 6.3 or later.
Refer to Chapter 3, "Controlling Network Access and Use," in the "Enabling Secure Authentication of Web Clients" section of the Cisco PIX Firewall and VPN Configuration Guide.
For a complete description of the command syntax for these new commands, refer to the Cisco PIX Firewall Command Reference.
Local User Authentication Database for Network and VPN Access
This feature allows cut-through and VPN (using xauth) traffic to be authenticated using the PIX Firewall local username database (as an alternative in addition to the existing authenticating via an external AAA server).
The server tag variable now accepts the value LOCAL to support cut-through proxy authentication using Local Database. For example:
aaa authentication include http inside 0.0.0.0 0.0.0.0 0.0.0.0 0.0.0.0 LOCAL
crypto map outside_map client authentication LOCAL
For more information on this feature, refer to "User Authentication Using the LOCAL Database" in the Cisco PIX Firewall and VPN Configuration Guide.For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
HTTPS and FTP Web Request Filtering via Enhanced Websense Integration
This feature extends the existing Websense-based URL filtering to HTTPS and FTP.
The filter ftp and filter https commands were added to the filter command in the PIX Firewall Version 6.3 software. For information on configuring this command, refer to "Filtering HTTPS and FTP Sites" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
Advanced Encryption Standard (AES)
This feature adds support for securing site-to-site and remote access VPN connections with the new international encryption standard. It also provides software-based AES support on all supported PIX Firewall models and hardware-accelerated AES via the new VAC+ card on select PIX Firewall Security Appliance models.
The aes | aes-192| aes-256 option is added to the isakmp policy encryption command in PIX Firewall Version 6.3 software. To configure this command, refer "Configuring IKE" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
Support for VPN Accelerator Card+ (VAC+)
PIX Firewall Version 6.3 adds support for the VAC+. VAC+ provides high-speed tunneling and encryption services for Virtual Private Network (VPN) remote access, and site-to-site intranet and extranet applications. The VAC+ is supported on any chassis that runs the Version 6.3 software, has an appropriate license to run VPN software, and has at least one PCI slot available.
For more information on the show crypto interface [counters] command, and a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
VPN NAT Traversal
This feature extends support for site-to-site and remote access IPSec-based VPNs to network environments that implement Network Address Translation (NAT) or Port Address Translation (PAT), such as airports, hotels, wireless hot spots, and broadband environments
This feature is added to the isakmp nat-traversal command in PIX Firewall Version 6.3 software. To configure this command, refer to "Using NAT Traversal" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
DHCP Server Support on Multiple Interfaces
PIX Firewall Version 6.3 allows as many integrated Dynamic Host Configuration Protocol (DHCP) servers to be configured as desired, and on any interface. DHCP client can be configured only on the outside interface, and DHCP relay agent can be configured on any interface. However, DHCP server and DHCP relay agent cannot be configured concurrently on the same PIX Firewall, but DHCP client and DHCP relay agent can be configured concurrently.
The [no] dhcpd address ip1[-ip2] if_name feature now allows dhcp servers to be configured as desired on any interface in the PIX Firewall Version 6.3 software. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
Diffie-Hellman (DH) Group 5 Support
PIX Firewall Version 6.3 adds support for 1536-bit MODP Group that has been given the group 5 identifier.
Use the isakmp policy group command to specify the Diffie-Hellman group to be used in an IKE policy. To configure this command, refer to "Configuring IKE" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
Verify Certificate Distinguished Name
This feature enables PIX Firewalls acting as either a VPN peer, site-to-site, or as an Easy VPN Remote (VPN Hardware Client) to validate that the Easy VPN Server or the other VPN Peer provides a certificate that matches an administrator specified criteria.
This feature was added to the ca verifycertdn command in PIX Firewall Version 6.3 software. To configure this command, refer to "Client Verification of the Easy VPN Server Certificate" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
Cryptographic Engine Known Answer Test (KAT)
The function of KAT is to test the instantiation of the PIX Firewall crypto engine. The test will be performed every time during the PIX Firewall boot up before the configuration is read from Flash memory. KAT will be run for valid crypto algorithms for the current license on the PIX Firewall. KAT can also be run from the command line in privileged mode, using the show crypto engine verify command.
The show crypto engine verify command was added to the PIX Firewall Version 6.3 software. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
Media Access Control (MAC) Based Authentication
This feature allows hosts to be exempted from a broader authentication requirement, based on their MAC addresses. This is essential for devices like printers and IP phones located inside a firewall.
The mac-list, aaa mac-exempt match <mac-list-id> and vpnclient mac-exempt <mac-add_1> <mac_mask_1> [<mac_addr_2> <mac_mask_2> commands are new commands. To configure this command on the PIX Firewall, refer to "Using MAC-Based AAA Exemption" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
Small Office, Home Office (SOHO) Enhancements
DHCP Relay
Acting as a DHCP relay agent, the PIX Firewall can assist in dynamic configuration of IP hosts on any of its interfaces. It receives requests from hosts on a given interface and forwards them to a user-configured DHCP server on another interface.This can work in conjunction with sit- to-site or Easy VPN, enabling businesses to centrally manage their IP address.
To support this feature, the dhcprelay command was added to PIX Firewall Version 6.3 software. For more information on the dhcprelay command, refer to "DHCP Relay" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
PAT for ESP
PIX Firewall Version 6.3 provides the ability to PAT IP protocol 50 to support single IPSec user outbound access.
To support this feature, the fixup protocol esp-ike command was added to PIX Firewall Version 6.3 software. For more information on this command, refer to "IPSec" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
Increased Firewall Performance on the PIX 501 and PIX 506E Security Appliances
PIX Firewall Version 6.3 unleashes new performance levels on the PIX 501 and PIX 506E, delivering up to six times more performance than previous software releases.
Increased Number of IPSec VPN Peers Supported on the PIX 501 Security Appliance
PIX Firewall Version 6.3 increases number of site-to-site and remote access VPN peers supported on the PIX 501 from 5 to 10, enabling greater VPN scalability in small office, home office (SOHO) environments.
Unlimited User License for the PIX 501 Security Appliance
With PIX 6.3, you can purchase or upgrade to an "Unlimited User License" for the PIX 501 which does not limit the hosts on the inside of the network that leverage applicable PIX resources. The Unlimited User License also increases the DCHP Server pool size to 256 addresses. Updates have also been made to ensure that the default factory configuration considers the PIX 501 User license installed in the device.
Easy VPN Server Load Balancing Support
The PIX Firewall VPN hardware client can participate in cluster-based concentrator load balancing. It supports VPN 3000 Series Concentrator load balancing with automatic redirection to the least utilized concentrator.
For more information on this command, refer to "Enabling Redundancy" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
Dynamic Downloading of Backup Easy VPN Server Information
Support for downloading a list of backup concentrators defined on the head-end.
The vpngroup group_name backup-server {{ip1 [ip2 ... ip10]} | clear-client-cfg}command is a new command added to the PIX Firewall Version 6.3 software. For more information on this command, refer to "Enabling Redundancy" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
Easy VPN Internet Access Policy
PIX Firewall Version 6.3 changes the behavior of a PIX Firewall used as an Easy VPN Remote device in regard to Internet access policy for users on the protected network. The new behavior occurs when split tunneling is enabled on the Easy VPN Server. Split tunneling is a feature that allows users connected through the PIX Firewall to access the Internet in a clear text session, without using a VPN tunnel.
The PIX Firewall used as an Easy VPN Remote device downloads the split tunneling policy and saves it in its local Flash memory when it first connects to the Easy VPN Server. If the policy enables split tunneling, users connected to the network protected by the PIX Firewall can connect to the Internet regardless of the status of the VPN tunnel to the Easy VPN Server.
For information about configuring the split tunneling policy on a PIX Firewall used as an Easy VPN Remote Server, refer to Chapter 8, "Managing VPN Remote Access," in the PIX Firewall and VPN Configuration Guide.
Custom Backup Concentrator Timeout
This feature constitutes a configurable time out on the PIX Firewall connection attempts to a VPN headend, thereby controlling the latency involved in rolling over to the next backup concentrator on the list.
This feature is added to the vpngroup command in PIX Firewall Version 6.3 software. For more information on this command, refer to "Enabling Redundancy" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
Easy VPN X.509 Certificate Support
X.509 certificates are used to access secure network systems. Users obtain certificates so they can identify themselves, present their access credentials, and obtain a secure network connection with other approved secure users or systems.
For more information on this command, refer to "Using X.509 Certificates" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
Flexible Easy VPN Management Solutions
In PIX Firewall Version 6.3, managing the PIX Firewall using the outside interface will not require the traffic to flow over the VPN tunnel. You will have the flexibility to require all NMS traffic to flow over the tunnel or fine tune this policy.
This feature was added to the vpnclient management command in the PIX Firewall Version 6.3 software. For configuration information, refer to "Controlling Remote Administration" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
User-Level Authentication
Support for individually authenticating clients (IP address based) on the inside network of the VPN hardware client. Both static and One Time Password (OTP) authentication mechanisms are supported. This is done through a web-based interface.
This new feature was added to the vpngroup command in PIX Firewall Version 6.3 software. For more information on this command, refer to "Using Authentication and Authorization" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
Secure Unit Authentication
This feature provides the ability to use dynamically generated authentication credentials to authenticate the Easy VPN Remote (VPN Hardware Client) device.
The secure-unit-authentication feature is added to the vpngroup command in the PIX Firewall Version 6.3 software. For configuration information, refer to "Using Secure Unit Authentication" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for these new commands, refer to the Cisco PIX Firewall Command Reference.
Easy VPN Web Interface for Manual Tunnel Control User Authentication and Tunnel Status
With the introduction of the User-Level Authentication and Secure Unit Authentication, features the PIX Firewall delivers the ability to enter the credentials, connect/dis-connect the tunnel and monitor the connection using new web pages served to users when attempting access to the VPN tunnel or unprotected networks through the PIX Firewall. This is only applicable to the Easy VPN Remote feature.
For configuration information, refer to "Connecting to PIX Firewall Over a VPN Tunnel" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this new feature, refer to the Cisco PIX Firewall Command Reference.
Security Fixups (Application Inspection) Enhancements
PPTP Fixup
This feature lets point-to-Point Tunneling Protocol (PPTP) traffic traverse the PIX Firewall when configured for PAT, performing stateful PPTP packet inspection in the process.
To configure PPTP Fixup on the PIX Firewall, refer to "PPTP Configuration" in the Cisco PIX Firewall and VPN Configuration Guide. The fixup protocol pptp 1723 command configures PPTP Fixup. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
H.323 Version 3 and 4 Support
With PIX Firewall Version 6.3, the PIX Firewall will support NAT and PAT for H.323 versions 3 and 4 messages, and in particular, the H.323 v3 feature Multiple Calls on One Call Signaling Channel.
This feature is added to the fixup protocol h.323 command in the PIX Firewall Version 6.3 software. For more information on this command, refer to "H.323" in the Cisco PIX Firewall and VPN Configuration Guide.For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
CTIQBE Fixup
Known also as TAPI/JTAPI Fixup, this feature incorporates a Computer Telephony Interface Quick Buffer Encoding (CTIQBE) protocol inspection module that supports NAT, PAT, and bi-directional NAT. This enables Cisco IP SoftPhone & other Cisco TAPI/JTAPI applications to work and communicate successfully with Cisco CallManager for call setup and voice traffic across the PIX Firewall.
This feature is added to the fixup protocol ctiqbe 2748 command in the PIX Firewall Version 6.3 software. For more information on this command, refer to "Voice over IP" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
MGCP Fixup
PIX Firewall Version 6.3 adds support for Media Gateway Control Protocol (MGCP) 1.0, enabling messages between Call Agents and VoIP media gateways to pass through the PIX Firewall in a secure manner.
To configure the fixup protocol mgcp command, refer to "Configuration for Multiple Call Agents and Gateways" in the Cisco PIX Firewall and VPN Configuration Guide. The following new commands are added to the PIX Firewall Version 6.3 software to supprot this new command: debug mgcp, fixup protocol mgcp, and so on. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
PAT for Skinny
This feature allows Cisco IP Phones to communicate with Cisco CallManager across the PIX Firewall when it is configured with PAT. This is particularly important in a remote access environment where Skinny IP phones behind a PIX Firewall talk to the CallManager at the corporate site through a VPN.
This feature is added to the fixup protocol skinny command in the PIX Firewall Version 6.3 software. For more information on this command, refer to "SCCP" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
Configurable SIP UDP Fixup
This provides a CLI-enabled solution for non-Session Information Protocol (SIP) packets to pass through the PIX Firewall instead of being dropped when they use a SIP UDP port (note that SIP UDP Fixup itself has been available since PIX Firewall Version 5.2).
This feature is added to the fixup protocol sip udp command in the PIX Firewall Version 6.3 software. For more information on this command, refer to "SIP" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
Fixup Protocol ICMP Error
PIX Firewall Version 6.3 introduces the ability to NAT ICMP error messages.
The icmp error feature was added to the fixup protocol command in the PIX Firewall Version 6.3 software. For information on configuring this feature, refer to "ICMP" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
Management Enhancements
ACL Editing
The Access Control List (ACL) editing feature provides users flexibility to insert or delete any access list element in an access list. The access list, with line numbers, will be shown with the show access-list <access-list-id> command and not with the show running-config command or write terminal command.
The line line-num feature was added to the access-list command in the PIX Firewall Version 6.3 software. For information on configuring this feature, refer to "Enabling Inbound Connections" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
Syslog by ACL Entry
This feature allows users to configure a specific Access Control List (ACL) entry with a logging option. When such an option is configured, statistics for each flow that matches the permit or deny conditions of the ACL entry are logged.
To configure the log option in the access-list command on the PIX Firewall, refer to "Logging Access Control List Activity" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for these new commands, refer to the Cisco PIX Firewall Command Reference.
Assignable Syslog Levels by Message
PIX Firewall Version 6.3 includes the ability to reassign the level of any syslog, allowing easy grouping of syslogs of interest.
The level option in the logging command is added to the PIX Firewall Version 6.3 software. For more information on this command, refer to "Enabling Logging to Syslog Servers" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
Custom Logging Identifier
Allows a custom firewall identifier to be selected, such as an interface IP address, that will be included in all syslog messages to improve the centralized reporting of firewall events.
This new feature is added to the logging command. For configuration information, refer to "Enabling Logging to Syslog Servers" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for these new commands, refer to the Cisco PIX Firewall Command Reference.
Cisco Logging Format
This feature will help users to log messages in Cisco EMBLEM format to a syslog server. The EMBLEM format is available for both messages with and without timestamp.
This new feature is added to the logging command. For configuration information, refer to "Enabling Logging to Syslog Servers" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for these new commands, refer to the Cisco PIX Firewall Command Reference.
Comments/Remarks in Access Control Lists (ACLs)
This feature allows users to include comments in access lists to make the ACL easier to understand and scan.
To configure the access-list id [line line-num] remark text command, in the access-list command, refer to "Enabling Inbound Connections" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
Interface Name as Address in ACLs
Users running the DHCP client on the PIX Firewall outside interface will no longer have to adjust their access lists every time the outside DHCP address is changed by their ISP.
The interface if_name command was added to the PIX Firewall Version 6.3 software. For information on configuring this feature, refer to "Enabling Inbound Connections" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
Custom Administrative Access Banner Messages
Users will be able to configure a message-of-the-day (motd), a login, and an exec banner that will be presented to users who access the PIX Firewall via the console, SSH, and Telnet.
To configure the banner command, refer to"Configuring PIX Firewall Banners" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
Console Connection Inactivity Timeout
Protects console from unauthorized administrative access by automatically logging out sessions after a configurable period of inactivity
The console command is a new command added to the PIX Firewall Version 6.3 software. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
show Command Output Filter
This feature provides the ability to filter or search through the full output of show commands.
For information on the show command_keywords [ | {include | exclude | begin | grep [-v]} regexp] command, refer to Chapter 1, "Getting Started" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
Remote Management Enhancements
This feature enables administrators to remotely manage firewalls over a VPN tunnel using the inside interface IP address of the remote PIX Firewall. In fact, administrators can define any PIX Firewall interface for management-access. This feature supports PDM, SSH, Telnet, SNMP, and so on, that requires a dynamic IP address. This feature significantly benefits broadband environments.
The management-access command is a new command added to the PIX Firewall Version 6.3 software. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
Enhanced show version Command
The output of the show version command is enhanced to display additional information.
For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
Increase Length of the PIX Firewall Host Name
Change the maximum allowed length of the host name to 63 characters. Change the maximum allowed length of the domain name from 64 to 63.This limits the maximum fully qualified domain name (plus terminating 0) to 127 bytes.
This new feature is added to the hostname command in the PIX Firewall Version 6.3 software. For configuration information, refer to "Using IKE with Pre-Shared Keys" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for these new commands, refer to the Cisco PIX Firewall Command Reference.
Serviceability Features
Stack Trace in Flash Memory
This feature enables the stack trace to be stored in non-volatile Flash Memory, so that it can be retrieved at a later time for debug/troubleshooting purposes.
The crashinfo command is a new command added to the PIX Firewall Version 6.3 software. For more information on this new command, refer to "Saving Crash information to Flash Memory" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
Enhanced show tech Command
This feature enhances the current show tech command output to include additional diagnostic information.
For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
Enhanced debug Command and Support
These commands turn off all active debugs at once, and restore the PIX Firewall to normal operation.
The no debug all, undebug all, debug arp, crypto vpnclient, debug aaa [authentication | authorization| accounting | internal] commands were added to the debug command in the PIX Firewall Version 6.3 software. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
Modification to GE Hardware Speed Settings
Modification to GE Hardware Speed Settings - Half duplex option removed. The Gigabit Ethernet cards can be configured by hardware in TBI or GMII mode. TBI mode does not support half duplex. GMII mode supports both half duplex and full duplex. All the i8255x controllers used in the PIX Firewalls are configured for TBI and thus cannot support half-duplex mode, hence the half-duplex setting is removed.
For more information, refer to "Identifying the Interface Type" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this command, refer to the Cisco PIX Firewall Command Reference.
Enhanced arp Command
New features were added to the arp command in the PIX Firewall Version 6.3 software. For more information on this new command, refer to "Setting Default Routes" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this new command, refer to the Cisco PIX Firewall Command Reference.
Enhanced capture Command
Users can now specify the capture command to store the packet capture in a circular buffer. The capture will continue writing packets to the buffer until it is stopped by the administrator.
For configuration information, refer to "Capturing Packets" in the Cisco PIX Firewall and VPN Configuration Guide. For a complete description of the command syntax for this new feature, refer to the Cisco PIX Firewall Command Reference.
Important Notes
Important Notes in Release 6.3(3)
Readme Document for the Conduits and Outbound List Conversion Tool 1.2
The PIX Outbound/Conduit Conversion tool assists in converting configurations with outbound or conduit commands to similar configurations using Access Control Lists (ACLs). ACL based configurations provide uniformity and leverage the powerful ACL feature set. ACL based configurations provide the following benefits:
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Important Notes in Release 6.3(2)
Major releases beyond PIX Firewall Version 6.3 will not support the conduit and outbound commands.
Important Notes in Release 6.3
This section describes important notes for Version 6.3.
ACL Source Address Change When an Alias is Configured
When the alias command is used for destination address translation, an inbound message originating from the foreign_ip source address is translated to the dnat_ip address. If you configure an inbound ACL with an address defined by the alias command, you must use the foreign_ip address as the ACL source address instead of the dnat_ip address, as was used in Release 6.2. The ACL check is now done before the translation occurs, which is consistent with the way the firewall treats other NATed addresses in ACLs.
Interface Settings on the PIX 501 and PIX 506E
With the PIX Firewall Version 6.3, the settings for the following interfaces have been updated as follows:
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Upgrading the PIX 506 and the PIX 515
When upgrading a classic PIX 506 or PIX 515 (the non "E" versions) to PIX Firewall OS Version 6.3, the following message(s) might appear when rebooting the PIX Firewall for the first time after the upgrade:
ethernet0 was not idle during boot.
ethernet1 was not idle during boot.
These messages (possibly one per interface) will be followed by a reboot. This is a one-time event and is a normal part of the upgrade on these platforms.
Easy VPN Remote and Easy VPN Server
The PIX 501 and PIX 506/506E are both Easy VPN Remote and Easy VPN Server devices. The PIX 515/515E, PIX 525, and PIX 535 act as Easy VPN Servers only.
The PIX 501 and PIX 506/506E can act as Easy VPN Remote devices or Easy VPN Servers so that they can be used either as a client device or VPN headend in a remote office installation. The PIX 515/515E, PIX 525, and PIX 535 act as Easy VPN Servers only because the capacity of these devices makes them appropriate VPN headends for higher-traffic environments.
PIX 535 Interfaces
These practices must be followed to achieve the best possible system performance on the PIX 535:
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The PIX-1GE Gigabit Ethernet adaptor is supported in the PIX 535; however, its use is strongly discouraged because maximum system performance with the PIX-1GE card is much lower than that with the PIX-1GE-66 card. The software displays a warning at boot time if a PIX-1GE is detected.
Table 2 summarizes the performance considerations of the different interface card combinations.
Caution
Caution
Caveats
The following sections describe the caveats for the 6.3 release.
For your convenience in locating caveats in Cisco's Bug Toolkit, the caveat titles listed in this section are drawn directly from the Bug Toolkit database. These caveat titles are not intended to be read as complete sentences because the title field length is limited. In the caveat titles, some truncation of wording or punctuation may be necessary to provide the most complete and concise description. The only modifications made to these titles are as follows:
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https://tools.cisco.com/Support/BugToolKit
To become a registered cisco.com user, go to the following website:
http://tools.cisco.com/RPF/register/register.do
Open Caveats - Release 6.3(3)
Resolved Caveats - Release 6.3(3)
Related Documentation
Use this document in conjunction with the PIX Firewall and Cisco VPN Client Version 3.x documentation at the following websites:
http://www.cisco.com/en/US/products/sw/secursw/ps2120/tsd_products_support_series_home.html
http://www.cisco.com/en/US/products/sw/secursw/ps2308/tsd_products_support_series_home.html
Cisco provides PIX Firewall technical tips at the following website:
http://www.cisco.com/warp/public/707/index.shtml#pix
Software Configuration Tips on the Cisco TAC Home Page
The Cisco Technical Assistance Center has many helpful pages. If you have a CCO account you can visit the following websites for assistance:
TAC Customer top issues for PIX Firewall:
http://www.cisco.com/warp/public/110/top_issues/pix/pix_index.shtml
TAC Sample Configs for PIX Firewall:
http://www.cisco.com/pcgi-bin/Support/PSP/psp_view.pl?p=Hardware:PIX&s=Software_Configuration
TAC Troubleshooting, Sample Configurations, Hardware Info, Software Installations and more:
http://www.cisco.com/pcgi-bin/Support/PSP/psp_view.pl?p=Hardware:PIX
Obtaining Documentation and Submitting a Service Request
For information on obtaining documentation, submitting a service request, and gathering additional information, see the monthly What's New in Cisco Product Documentation, which also lists all new and revised Cisco technical documentation, at:
http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html
Subscribe to the What's New in Cisco Product Documentation as a Really Simple Syndication (RSS) feed and set content to be delivered directly to your desktop using a reader application. The RSS feeds are a free service and Cisco currently supports RSS version 2.0.
