I am trying to setup a site-to-site VPN with a customer in another state but the tunnel never makes it through phase 1. I I have two other tunnels on this router, one to a Concentrator 3000 and the other to another Cisco router, and they both work fine.
The debug output (which I've attached) shows the following:
received packet from 172.16.3.1 dport 500 sport 500 Global (N) NEW SA
172.16.3.1 is the private network on the other side of the tunnel. Shouldn't this be the public side of the SonicWall device? I don't have access to the other end and am having to work via phone and chat. The person at the other end is working with SonicWall to debug their end. I wanted to make sure the my end was correct.
On our side, the tunnel is terminated on a Cisco 1841 router running 12.4(3g). The other end is terminated on a SonicWall Pro 4100 that sits behind a router.
Thanks for any help.