For some unknown reason our Windows 2000 SP4 server has stopped to perform some network actions. Previously everyting was OK, and this server was used for these two reasons:
(1) As a domain controller for a domain consisting of few Windows XP SP1 machines
(2) As the manager for Symantec AntiVirus Corporate Edition. Clients use this server to gain updates, so only this server nees to be updated each every often.
The problem has started without anything installed or any configuration changed on the machine.
The computer fails to ping any other computer, inside the local network, or outside in the internet. The computer fails to find the IP address for a domain name, for example when checkin with nslookup.
Event viewer shows such error message for every two hour:
Dynamic registration or deregistration of one or more DNS records failed because no DNS servers are available.
So DNS is not working correctly. When I go to services.msc it shows that both client and server DNS services are running.
The funny thing is some of our Windows XP clients, are using this server as the primary and "ONLY" DNS server on the LAN, and they are working correctly (they have internet access!)
One can not ping any other machines from the server but all other machines can ping this computer.
Current DNS configuration (which used to work, and if has changed, I have not noticed it):
One forward lookup zone, one reverse lookup zone. (Do I need more?)
Both used to help machines in our domain (named TOSCA) to find each other!
Autoupdates enabled for all entries in the DNS tree.
Any help is highly appreciated.