I have a Cisco 1720 router in front of a ISA 2006. I want to create a VPN site-to-site from a branch office using a Linksys RVS4000 (IPSec) to the ISA 2006. The external IP address of the Linksys is 18.104.22.168, the external IP address of the ISA (in the 1720) is 22.214.171.124, which is nat to 126.96.36.199. Everytime I try to create a tunnel to the ISA, the tunnel is not created. On the Linksys VPN log, I get the following:
Main mode peer ID is ID_IPV4_ADDR: '188.8.131.52'
we require peer to have ID '184.108.40.206', but peer declares '220.127.116.11'
Is there a way I can change the peer ID in the Cisco, so the traffic is passed to the ISA? Like an alias?