Win 2000 Server network connection issue

[Gersen]

howdy all,

We use a Windows 2000 Server running Microsoft ISA server as our proxy to the internet. It stopped working today, and in the process of troubleshooting I got the error "destination host unreachable" when trying to ping from the external NIC on the proxy server to the internal NIC on the Cisco router.

When I was unable to resolve this, I tried various tests and I was able to ping the Cisco from other machines and swapped in a known good patch cord. I remained unable to ping anything from the external interface. I swapped the configs of the 2 NICs in the system, making this NIC the internal interface, and was then able to ping the Cisco but not the internal network, narrowing the problem to the NIC itself. Or so I thought...

I popped in a new NIC, added drivers and configured it on the same address as the old one. Once again, I am able to ping its own address, but nothing else...

If our external IP is 1.2.3.4, I can ping that address but not 1.2.3.1 or 1.2.3.2, etc, etc. Every attempt results in the "destination host unreachable" error.

I'm at a loss for how to continue. Lil help?

Muchas gracias and domo arigato,

Gersen

 

[Gersen]

Ok, nevermind this one. We got it resolved without knowing how; one of those God-only-knows fixes.

Sorry

G.