I have recently been asked to give our one and only Windows 2003 Server access to the internet. The reason for this is one of the applications installed on the server can no longer use dialup to download data updates, and must now use broadband via the router that was installed a few years back. This server currently manages all services inc. file server, print server, terminal services, DNS, DHCP, AD and a few shared applications.
To prevent the server from previously access the internet (and to stop terminal service users from accessing the internet), we simply removed the gateway information in the network adaptor on the server. This has been working fine for about three years, and the server never missed a beat. After adding the gateway information into the network adaptor, services began to fail. Every five minutes, we are getting a Userenv Event ID: 1030 being generated, followed by a Userenv Event ID: 1053 two minutes there after. The SQL service will stop responding (which doesn't generate an event in the event log), and all the shared printers on the network stop responding as well (local TCP/IP printers aren't effected). About 30 minutes later, DNS and Group Policty Management are unbrowsable (I get a message 'The server is not operational'. As before, no events are generated in the event log).
One other strange behaviour I observed, was that when searching for google.com.au in Internet Explorer, it would work for about 10 minutes after adding the gateway information, but shortly there after, it would fail and the status bar shows attempts to search for google.com.au.org, google.com.au.edu, google.com.au.com etc...
The only solution is to restart the server and to remove the gateway information from the server network adaptor. The error is reproducable.
Any suggestions would be greatly appreciated!