I have two Windows 2003 servers operating within my LAN, each with static IPs (*.*.*.7 -a domain controller and *.*.*.8 -the PDC). The PDC is where we have configured the DNS zone, a copy is being replicated onto the DC
For the PDC, I have the DNS server set to *.*.*.8 (its own address), while for the other DC, I have the PDC's IP. My DHCP service is provided by my Netscreen firewall, and there we have identified the DC's IP as the DNS server.
My problem is that over the last six months we have had a recurring situation where one or both of the machines loses its ability to surf the internet. Investigations show that they are not able to ping externally by IP or by name. We have found that the situation is resolved simply by changing the static IP to some other number within the range.
Why should this be happening? We are not making any changes to the DNS configuration and cannot identify anything which might trigger the loss of this service