PDC - NT 4.0

Well, it really depends on the load on the server. DOes this server have adequate RAM? It it running hot, or is it ok when you open Task Manager on it?
I would suggest you open the Event Viewer and look in the logs. It sounds like the Proxy server service (assuming the proxy runs as a Service) is failing, and that is why noone can access the Internet. Restarting the proxy starts the service back up again.
Now, you need to figure out why the service is failing, and the Event Viewer logs shouldtell you something. You can go from there.

Personally, my NT4 PDC is also my DHCP, WINS and major file server, and it is fine. It has plenty of RAM and available CPU, and it handles my 100 user office just fine.

hope this helps

From a security point of view - I wouldn't have a proxy server with an internet connection as anything other than a member server or PDC/BDC in its own domain (no real user accounts). You dont really want your account information stored on a internet gateway.

I've had proxy 2 running on a PDC with no problems (in its own domain with 2 proxies - one PDC internal, one BDC external). I'd try monitoring some processes to see if they are leaking memory if there is nothing immediately evident fromthe event logs.

Well, it depends on your hardware, but I wouldn't have a Proxy as PDC, security reasons. get another computer, smaller, it doesn't have to be a huge computer, make it BDC, then demote your Proxy server and make your new pc as PDC and everything willbe great as it was before.

Good luck,

@lberto

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