Table Of Contents

Easy VPN Remote RSA Signature Support

Contents

Prerequisites for Easy VPN Remote RSA Signature Support

Restrictions for Easy VPN Remote RSA Signature Support

Information About Easy VPN Remote RSA Signature Support

Easy VPN Remote RSA Signature Support Overview

How to Configure Easy VPN Remote RSA Signature Support

Configuring Easy VPN Remote RSA Signature Support

Additional References

Related Documents

Standards

MIBs

RFCs

Technical Assistance

Feature Information for Easy VPN Remote RSA Signature Support

Easy VPN Remote RSA Signature Support

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First Published: March 1, 2004

Last Updated: August 21, 2007

The Easy VPN Remote RSA Signature Support feature provides for the support of Rivest, Shamir, and Adelman (RSA) signatures on Easy VPN remote devices. The support is provided through RSA certificates that can be stored on or off the remote device.

Finding Feature Information in This Module

Your Cisco IOS software release may not support all of the features documented in this module. To reach links to specific feature documentation in this module and to see a list of the releases in which each feature is supported, use the "Feature Information for Easy VPN Remote RSA Signature Support" section.

Finding Support Information for Platforms and Cisco IOS and Catalyst OS Software Images

Use Cisco Feature Navigator to find information about platform support and Cisco IOS and Catalyst OS software image support. To access Cisco Feature Navigator, go to http://tools.cisco.com/ITDIT/CFN/jsp/index.jsp. An account on Cisco.com is not required.

Contents

•Prerequisites for Easy VPN Remote RSA Signature Support

•Restrictions for Easy VPN Remote RSA Signature Support

•Information About Easy VPN Remote RSA Signature Support

•How to Configure Easy VPN Remote RSA Signature Support

•Additional References

Prerequisites for Easy VPN Remote RSA Signature Support

•You must have a Cisco Virtual Private Network (VPN) remote device and be familiar with configuring the device.

•You must have a certification authority (CA) available to your network before you configure this interoperability feature. The CA must support the public key infrastructure (PKI) protocol of Cisco Systems, which is the Simple Certificate Enrollment Protocol (SCEP) (formerly called certificate enrollment protocol [CEP]).

•You should be familiar with IP Security (IPSec) and PKI.

•You should be familiar with configuring RSA key pairs.

•You should be familiar with configuring CAs.

Restrictions for Easy VPN Remote RSA Signature Support

•This feature should be configured only when you also configure both IPSec and Internet Key Exchange (IKE) in your network.

•The Cisco IOS software does not support CA server public keys greater than 2048 bits.

Information About Easy VPN Remote RSA Signature Support

To configure the Easy VPN Remote RSA Signature Support feature, you should understand the following concept:

•Easy VPN Remote RSA Signature Support Overview

Easy VPN Remote RSA Signature Support Overview

The Easy VPN Remote RSA Signature Support feature allows you to configure RSA signatures on your Easy VPN remote device. The signatures can be stored on or off your remote device.

How to Configure Easy VPN Remote RSA Signature Support

This section contains the following procedure:

•Configuring Easy VPN Remote RSA Signature Support

Configuring Easy VPN Remote RSA Signature Support

The RSA signatures for an Easy VPN remote device are configured the same way that you would configure RSA signatures for any other Cisco device. (For information about configuring RSA signatures, refer to the "Configuring Certification Authority Interoperability" chapter of the "IP Security and Encryption" section of the Cisco IOS Security Configuration Guide, Release 12.4.)

To enable the RSA signatures, when you are configuring the Easy VPN remote and assigning the configuration to the outgoing interface, you must omit the group command. The content of the first Organizational Unit (OU) field will be used as the group. For information about configuring Cisco Easy VPN remote devices, refer to the "Cisco Easy VPN Remote" chapter of the Cisco IOS Security Configuration Guide: Secure Connectivity.

To troubleshoot your Easy VPN remote RSA signature configuration, you can use the following debug commands. The debug commands can be used in any order or individually.

SUMMARY STEPS

1. enable

2. debug crypto ipsec client ezvpn

3. debug crypto isakmp

DETAILED STEPS

	Command or Action	Purpose
Step 1	enable Example: Router> enable	Enables privileged EXEC mode. •Enter your password if prompted.
Step 2	debug crypto ipsec client ezvpn Example: Router# debug crypto ipsec client ezvpn	Displays information about the VPN tunnel as it relates to the Easy VPN remote configuration.
Step 3	debug crypto isakmp Example: Router# debug crypto isakmp	Displays messages about IKE events.

Additional References

The following sections provide references related to Easy VPN Remote RSA Signature Support.

Related Documents

Related Topic	Document Title
Configuring Internet Key Exchange for IPSec VPNs	Configuring Internet Key Exchange for IPsec VPNs
Deploying RSA keys	Deploying RSA Keys Within a PKI
Certificate Authorities	•Easy VPN Server •Cisco IOS PKI Overview: Understanding and Planning a PKI •Deploying RSA Keys Within a PKI •Configuring Certificate Enrollment for a PKI
Configuring a Cisco Easy VPN remote device	Cisco Easy VPN Remote
Security commands	Cisco IOS Security Command Reference

Standards

Standards	Title
There are no new or modified standards associated with this feature.	—

MIBs

MIBs	MIBs Link
There are no new or modified MIBs associated with this feature.	To locate and download MIBs for selected platforms, Cisco IOS software releases, and feature sets, use Cisco MIB Locator found at the following URL: http://www.cisco.com/go/mibs

RFCs

RFCs	Title
There are no new or modified RFCs associated with this feature.	—

Technical Assistance

Description

Link

The Cisco Support website provides extensive online resources, including documentation and tools for troubleshooting and resolving technical issues with Cisco products and technologies. To receive security and technical information about your products, you can subscribe to various services, such as the Product Alert Tool (accessed from Field Notices), the Cisco Technical Services Newsletter, and Really Simple Syndication (RSS) Feeds. Access to most tools on the Cisco Support website requires a Cisco.com user ID and password.

http://www.cisco.com/techsupport

Feature Information for Easy VPN Remote RSA Signature Support

Table 1 lists the release history for this feature.

Not all commands may be available in your Cisco IOS software release. For release information about a specific command, see the command reference documentation.

Use Cisco Feature Navigator to find information about platform support and software image support. Cisco Feature Navigator enables you to determine which Cisco IOS and Catalyst OS software images support a specific software release, feature set, or platform. To access Cisco Feature Navigator, go to http://tools.cisco.com/ITDIT/CFN/jsp/index.jsp. An account on Cisco.com is not required.

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Note Table 1 lists only the Cisco IOS software release that introduced support for a given feature in a given Cisco IOS software release train. Unless noted otherwise, subsequent releases of that Cisco IOS software release train also support that feature.

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Table 1 Feature Information for Easy VPN Remote RSA Signature Support 

Feature Name	Releases	Feature Information
Easy VPN Remote RSA Signature Support	12.3(7)T1 12.2(33)SRA 12.2(33)SXH	The Easy VPN Remote RSA Signature Support feature provides for the support of Rivest, Shamir, and Adelman (RSA) signatures on Easy VPN remote devices. The support is provided through RSA certificates that can be stored on or off the remote device. The following sections provide information about this feature: •"Easy VPN Remote RSA Signature Support Overview" section •"Configuring Easy VPN Remote RSA Signature Support" section
Easy VPN Client RSA - Signature Support	Cisco IOS XE Release 2.1	This feature was introduced on Cisco ASR 1000 Series Routers.

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