IPSec Site-to-Site VPN DNS resolving issues
Posted on 2011-09-15
I'm having a bit of a strange problem. I've recently stood up a stie-to-site vpn between two sites with static IPs. Both sites are using a Cisco RVS4000, and the VPN came up with no issues.
Now that the VPN is up, I'm having DNS issues. On the remote end, I have clients set to use the DNS server in the primary site.
I can hit the server via its internal IP, but whenever I try and resolve any host names, DNS is returning the external IP address of the primary site.
I've flushed the DNS cache on all sides, and made sure that the internal IP is the only thing supplying clients with DNS addresses - but unfortunately - I'm still looking at my external IP whenever I try to resolve internal host names through the VPN.
I haven't seen something like this before, so anybody that has any insight - it would be more than welcome.