I’m in the process of setting up a 2003 Server box to run DNS, DHCP and DNS. Installed DNS server as advised. All ok, forwarders working with external DNS requests being forwarded onto the router and being resolved. Then I setup DHCP and everything seems to be OK there too. Machines in the workgroup are being allocated ips and are able to access each other and the net. Then I've setup a domain, using the wizard and it confirms that everything has setup a.o.k. I’m able to connect to the domain from a client machine. The thing is when I run NSLOOKUP (on either the DNS server or a client machine) it’s returning the following: *** Can't find server name for address 192.168.1.100: Non-existent domain Default Server: UnKnown Address: 192.168.1.100 And when trying to ping the server from itself: > ping glassmaster Server: glassmaster.GLASS.HOUSE.LOCAL Address: 192.168.1.100 *** glasshouse-srv can't find ping: Non-existent domain The DNS seems to be working though as it's resolving internal and external names. I’ve run ipconfig /all on the the client (member of the domain) and it’s Primary DNS Suffix is listed as GLASS.HOUSE.LOCAL, this is also the only entry in the DNS Suffix Search List. Any advice (or links) would be greatly appreciated as I’ve been banging my head against wall with this for sometime. I really can’t see where I’m going wrong and no amount of googling seems to show me any different.