troubleshooting Question

VPN through Cisco 1720 to ISA 2006

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john_fugazi asked on
VPNInternet Protocol SecurityMicrosoft Forefront ISA Server
21 Comments1 Solution1022 ViewsLast Modified:
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, the external IP address of the ISA (in the 1720) is, which is nat to  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: ''
we require peer to have ID '', but peer declares ''

Is there a way I can change the peer ID in the Cisco, so the traffic is passed to the ISA?  Like an alias?
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