Specifications

BETA DRAFT REVIEW—CISCO CONFIDENTIAL
Configuring Security Features
Configuring VPN
22
Cisco 3900 Series, 2900 Series, and 1900 Series Integrated Services Routers Software Configuration Guide
Configuration Example
The following configuration example shows a portion of the configuration file for a site-to-site VPN
using a GRE tunnel as described in the preceding sections.
!
aaa new-model
!
aaa authentication login rtr-remote local
aaa authorization network rtr-remote local
aaa session-id common
!
username username1 password 0 password1
!
interface tunnel 1
ip address 10.62.1.193 255.255.255.252
tunnel source fastethernet 0
tunnel destination interface 192.168.101.1
ip route 20.20.20.0 255.255.255.0 tunnel 1
crypto isakmp policy 1
encryption 3des
authentication pre-share
group 2
!
crypto isakmp client configuration group rtr-remote
key secret-password
dns 10.50.10.1 10.60.10.1
domain company.com
pool dynpool
!
crypto ipsec transform-set vpn1 esp-3des esp-sha-hmac
!
crypto ipsec security-association lifetime seconds 86400
!
crypto dynamic-map dynmap 1
set transform-set vpn1
reverse-route
!
crypto map static-map 1 ipsec-isakmp dynamic dynmap
crypto map dynmap isakmp authorization list rtr-remote
crypto map dynmap client configuration address respond
!
! Defines the key association and authentication for IPsec tunnel.
crypto isakmp policy 1
hash md5
authentication pre-share
crypto isakmp key cisco123 address 200.1.1.1
!
!
! Defines encryption and transform set for the IPsec tunnel.
crypto ipsec transform-set set1 esp-3des esp-md5-hmac
!
! Associates all crypto values and peering address for the IPsec tunnel.
crypto map to_corporate 1 ipsec-isakmp
set peer 200.1.1.1
set transform-set set1
match address 105
!
!