I have a strange issue with DNS resolution on my Windows 7 Professional with a Cisco VPN Client. I have configured an ASA5510 with version 8.x for VPN Remote Access. I configured split tunneling. The DNS Server configured is the internal DNS server.
When I connect from outside, it all works great, I can ping everywhere I want, but as I try to resolve an internal DNS Name it doesn't work. But external Names do work.
Then I started Wireshark to see, what happens to my DNS queries --> As long as the trace is running on the VPN interface I can resolve internal names?!?! As soon as I stop the trace nslookup gives back timeouts.
Does anybody have an idea what this can be?