Wanted to share a issue I have been working on with the new release of iOS6. Not looking to get configuration support, just sharing the observations.
My issue is Anyconnect clients that are on iOS6 fail to use Internal DNS servers. After a few hours of testing, I have come to the point that I feel the issue is in the client OS. The end user affect is that if you have a SSL session established the end client can not resolve internal DNS address. Input of the IP directly works, and captures from the ASA show the Client asking and getting a response from the correct DNS server.
Downgrade from iOS6 to lower version the problem goes away. Upgrade back to iOS6 the problem returns.
Affected testing versions.
Anyconnect Client 2.5.5130
Apple iOS5.4 and iOS6.
ASA 8.4(3)8
CVN
