Cisco 851W Configuration Guide - Page 85

Chapter 7 Configuring VPNs Using an IPSec Tunnel and Generic Routing Encapsulation Configure a VPN Step 3 Command or Action reverse-route Example: Router(config-crypto-map)# reverse-route Router(config-crypto-map)# Purpose Creates source proxy information for the crypto map entry. See the Cisco IOS Security Command Reference for details. Step 4 exit Enters global configuration mode. Example: Router(config-crypto-map)# exit Router(config)# Step 5 crypto map map-name seq-num [ipsec-isakmp] Creates a crypto map profile. [dynamic dynamic-map-name] [discover] [profile profile-name] Example: Router(config)# crypto map static-map 1 ipsec-isakmp dynamic dynmap Router(config)# Apply the Crypto Map to the Physical Interface The crypto maps must be applied to each interface through which IPSec traffic flows. Applying the crypto map to the physical interface instructs the router to evaluate all the traffic against the security associations database. With the default configurations, the router provides secure connectivity by encrypting the traffic sent between remote sites. However, the public interface still allows the rest of the traffic to pass and provides connectivity to the Internet. Perform these steps to apply a crypto map to an interface, beginning in global configuration mode: Step 1 Command or Action interface type number Example: Router(config)# interface fastethernet 4 Router(config-if)# Purpose Enters interface configuration mode for the interface to which you want to apply the crypto map. OL-5332-01 Cisco 850 Series and Cisco 870 Series Access Routers Software Configuration Guide 7-7