Recursive query test on Domain Controller to external name servers fails, and yet NSLOOKUP queries are ok.
Our main DC (which holds all FSMO roles) is configured to use AT&T name servers (our ISP) for external queries (forwarders) and we have no obvious connectivity problems on our network at the moment. Except that this test is failing and I am concerned that there is an underlying problem.
Running NSLOOKUP on this DC works fine and I can query the AT&T name servers for any public lookup request. This shows that outbound internet access is unimpeded: servers have a perimeter firewall rule to allow all outbound access.
The only other sign of a DNS problem is that that DC doesn't seem to 'know itself'! running NSLOOKUP gives the following result and it showsServer: unknown.
Thanks in advance!