Cisco ISR 4000 Family Routers Administrator Guidance 
Page 22 of 66 
 
TOE-common-criteria(config)#interface g0/0 
TOE-common-criteria(config-if)#ip address 10.10.10.110 255.255.255.0 
TOE-common-criteria(config-if)#crypto map sample 
TOE-common-criteria(config-if)#interface Loopback1 
TOE-common-criteria(config-if)#ip address 30.0.0.1 255.0.0.0 
TOE-common-criteria(config-if)#exit 
TOE-common-criteria(config)# ip route 40.0.0.0 255.0.0.0 10.10.10.101 
TOE-common-criteria(config)# access-list 170 permit ip 30.0.0.0 0.255.255.255 40.0.0.0 
0.255.255.255 
TOE-common-criteria(config)#logging source-interface Loopback1 
TOE-common-criteria(config)#logging host 40.0.0.1 
3.3.5.2 Syslog Server Adjacent to an IPsec Peer 
If the syslog server is not directly co-located with the TOE, then the syslog server must be located 
in a physically protected facility and connected to a router capable of establishing an IPsec tunnel 
with the TOE. This will protect the syslog records as they traverse the public network.  
Following are  sample  instructions  to  configure  the  TOE  to  support  an  IPsec  tunnel  with  aes 
encryption, with 11.1.1.4 as the IPsec peer, 10.1.1.7 and 11.1.1.6 as the local IPs, and the syslog 
server on the 12.1.1.0 /28 subnet: 
TOE-common-criteria#configure terminal 
TOE-common-criteria(config)#crypto isakmp policy 1 
TOE-common-criteria(config-isakmp)#encryption aes 
TOE-common-criteria(config-isakmp)#authentication pre-share 
TOE-common-criteria(config-isakmp)#group 14 
TOE-common-criteria(config-isakmp)#lifetime 28800 
TOE-common-criteria(config)#crypto isakmp key [insert 22 character preshared key] 
address 10.10.10.101 
TOE-common-criteria(config)#crypto isakmp key [insert 22 character preshared key] 
address 40.0.0.1 
TOE-common-criteria(config)#crypto ipsec transform-set sampleset esp-aes esp-sha-
hmac 
TOE-common-criteria(cfg-crypto-trans)#mode tunnel 
TOE-common-criteria(config)#crypto map sample 1 ipsec-isakmp 
TOE-common-criteria(config-crypto-map)#set peer 11.1.1.4 
TOE-common-criteria(config-crypto-map)#set transform-set sampleset 
TOE-common-criteria(config-crypto-map)#match address 115 
TOE-common-criteria(config-crypto-map)#exit 
TOE-common-criteria(config)#interface g0/1 
TOE-common-criteria(config-if)#ip address 10.1.1.7 255.255.255.0 
TOE-common-criteria(config-if)#no ip route-cache 
TOE-common-criteria(config-if)#crypto map sample 
TOE-common-criteria(config-if)#interface g0/0 
TOE-common-criteria(config-if)#ip address 11.1.1.6 255.255.255.0