I am having a very strange problem. I have a mail server with about 9 different email domains on it, each has its own IP address. This server sits in the DMZ, with a PIX515 firewall in between it and our network.
On occasion, sometimes a couple of times a day, I lose connectivity to ONE particular ip address on the server from our network. I can ping the ip address fine from the server itself, and I can ping any other bound ip on the server from my workstation, I just can't ping that ONE from my workstation (neither can any other pc on the network). It is only one IP address, and a reboot fixes the problem.
This was happening on an NT 4.0 server, and since I wanted to upgrade it, i used this an excuse to do that. So, I put a clean install of Windows 2000 server and rebuit it. Still does it. I also tried binding that particular IP address to a different NIC, it didn't help.
Any ideas at all?