Cisco 7604 Configuration Guide - Page 528
Configuring VPN Client Access, isakmp policy, esp-sha-hmac, esp-aes-256, esp-aes, esp-null
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Allowing a VPN Management Connection Chapter 23 Configuring Management Access You can refer to up to set transform sets for the tunnel, and the sets are checked in order until the transforms match. The authentication and encryption algorithms of this transform typically match the IKE policy (isakmp policy commands). For site-to-site tunnels, this transform must match the peer transform. Authentication options include the following (from most secure to least secure): • esp-sha-hmac • esp-md5-hmac Encryption options include the following (from most secure to least secure): • esp-aes-256 • esp-aes-192 • esp-aes • esp-3des • esp-des Note esp-null (no encryption) is for testing purposes only. For example, to configure the IKE policy and the IPSec transform sets, enter the following commands: hostname(config)# isakmp policy 1 authentication pre-share hostname(config)# isakmp policy 1 encryption 3des hostname(config)# isakmp policy 1 group 2 hostname(config)# isakmp policy 1 hash sha hostname(config)# isakmp enable outside hostname(config)# crypto ipsec transform-set vpn_client esp-3des esp-sha-hmac hostname(config)# crypto ipsec transform-set site_to_site esp-3des ah-sha-hmac Configuring VPN Client Access In routed mode, a host with Version 3.0 or 4.0 of the Cisco VPN client can connect to the FWSM for management purposes over a public network, such as the Internet. Transparent firewall mode does not support remote clients. Transparent mode does support site-to-site tunnels. To allow remote clients to connect to the FWSM for management access, first configure basic VPN settings (see "Configuring Basic Settings for All Tunnels"), and then perform the following steps: Step 1 To specify the transform sets (defined in the "Configuring Basic Settings for All Tunnels" section on page 23-5) allowed for client tunnels, enter the following command: hostname(config)# crypto dynamic-map dynamic_map_name priority set transform-set transform_set1 [transform_set2] [...] List multiple transform sets in order of priority (highest priority first). This dynamic crypto map allows unknown IP addresses to connect to the FWSM. The dynamic-map name is used in Step 2. 23-6 Catalyst 6500 Series Switch and Cisco 7600 Series Router Firewall Services Module Configuration Guide using ASDM OL-20748-01
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