I have an issue I've been trying to resolve for some time.
We have an HP Proliant ML350 server configured with Windows Server 2003 Standard, Service Pack 2, and is configured as a member of the workgroup each workstation belongs to.
In this server there are 2 network connections, a LAN and a WAN.
The LAN connects from the On-Board NIC to a switch, which connects to the router provided by our ISP. This connection is set up with a static IP behind the router, with an address of 192.168.0.XX and Subnet 255.255.255.0
The WAN connects from an installed NIC card (Broadcom's NC373i) in a similar way, excepting that it is set up with 3 IP Addresses directly assigned by our ISP (therefore not behind the router, but something similar to what you would get if you browse to http://www.whatismyip.com/
The issue we are having is that occasionally, the WAN connection will "drop off", or loose all connectivity with the Web. This thus causes clients to be unable to login to our system, and the browser to be unable to load anything. Of course this is even more annoying if it happens over the weekend and I have to run in to the office to restore the connection.
In order for me to quickly fix the drop off, I have to run a Repair on the WAN connection and then verify that something pulls up in the browser. The frustrating part is that sometimes it will go days without the problem, and then sometimes it is dropping off 4 or 5 times in one day.
I've already tried updating the drivers too, but to no avail.
Any advice would be greatly appreciated. We'd like to tackle this problem right away and not have to worry about it any longer.