Specifications

7-10
Cisco 1800 Series Integrated Services Routers (Fixed) Software Configuration Guide
OL-6426-02
Chapter 7 Configuring VPNs Using an IPSec Tunnel and Generic Routing Encapsulation
Configuration Example
Configuration Example
The following configuration example shows a portion of the configuration file for a VPN using a GRE
tunnel scenario 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 cisco password 0 cisco
!
interface tunnel 1
ip address 10.62.1.193 255.255.255.252
tunnel source fastethernet 2
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
!
crypto isakmp policy 1 ! defines the key association and authentication for ipsec tunnel.
hash md5
authentication pre-share
crypto isakmp key cisco123 address 200.1.1.1
!
!
crypto ipsec transform-set set1 esp-3des esp-md5-hmac ! defines encryption and transform
set for the ipsec tunnel.
!
crypto map to_corporate 1 ipsec-isakmp ! associates all crypto values and peering address
for the ipsec tunnel.
set peer 200.1.1.1
set transform-set set1
match address 105
!
!!
interface vlan 1 ! VLAN 1 is the internal home network