Unidentified Networks on Windows 2008 R2

The problem occurs when you have dual homed servers with only one server having connectivity to a DNS server. The problem is that an unidentified network is effectively shut down and will not accept any inbound connections. There has been a number of discussions on resolving this, but the solution is quite simple.

TCP/IPv4 solution

1. Open up the IP V4 properties from the problem Network adaptor
2. Click the Advanced tab
3. Click the DNS tab
4. in 'DNS Suffix for this connection', enter your local AD Domain Name

Seemples...