I have a network with 6 Wk2003 and 2ea. w2k8 servers. One of my older W2k3 servers is acting as my internal DNS server. I have an entry for this server in the forward lookup zones for my domain. Each day, about every 6 hours or so it changes the IP address. Let me explain further.
This server was a proxy server with 3 nics. 1ea. for the Internet, 1ea. for network A and 1ea. for network B. It's IP was 192.168.1.1 as it was the gateway. I've since installed a router that does this routing for me and this server is now only acting as a DNS server. Although there are other services running on it (leftover) DNS is all that's really needed. I have entries for each server and it's associated address, including this server. And although I've changed the IP from 192.168.1.1 to 192.168.1.2, the server entry in the forward lookup zone periodically changes BACK to 192.168.1.1. Any ideas? It's throwing my internal network for a loop as it's periodically loosing it's DNS server in essence.