We have a Windows 2003 Server on a network with another Windows 2003 Server. The one we are having problems with is not running DNS or DHCP for the network. From time to time, we lose inbound and outbound Internet connectivity - i.e. we can no longer RDP into it from the outside, we can not browse the Internet, and we can not ping either an outside domain name or an outside IP address.
However, we can still RDP to it from the other server, no users complain of any issues with its applications, the Internet is confirmed up (that's how we get into the working server), and the problem server can still talk to all machines on the network.
Any help on where to look would be appreciated. Thanks in advance.