I have a system where none of the windows servers can resolve dns. I've turned off the firewall completely. I am helping out a friend who has just taken over IT for this company.
I added a windows 2008 R2 to the domain but after I ran dcpromo it could no longer resolve ip addresses. Internal DNS server is started but it can't see root servers or forwarders.
I can't find a group policy that has anything to do with dns on the domain. I'm wondering if some how someone changed the outoing dns port but only on the servers. The workstations all resolve names just fine.
I icon in the systray for a network connection shows a yellow exclamation point because it can't get the net. nslookup doesn't work either. It shows the local dns server but it won't resolve anything. I can ping IPs on the net.