I have a peer-to-peer network set up with about 12 computers. Each computer currently has a static IP address and we connect to the Internet via a DSL modem connected directly to our hub. The computers are running Windows 2000 Pro or XP Pro and have Norton Internet Security (including anti-virus). We are switching to a new DSL provider with a single static IP. I have installed a second ethernet card in a system with 2000Pro for use as the ICS host (referred to as file server) and reconfigured the card to connect to the new DSL modem. I can access the Internet and email from the file server. I’ve configured this computer for Internet sharing including configuring the default ports. I’ve taken 2 of the other computers, reconfigured the TCP/IP for automatic IP addresses, and can access the file server. I’ve reconfigured Norton to allow access for the new IP address ranges. I’ve even moved the 3 computers for this test to a separate hub to isolate them from the existing network.
I cannot access the Internet from the other computers. From these computers, I can ping (get a response from a ping) both cards on the file server but cannot ping the gateway or the DNS servers as I can from the file server. I’ve disabled the Norton temporarily but it doesn’t help and I don’t want to run my file server without a firewall.
Even though I’ve disabled Norton’s on all systems, is there something that could be running in the background that is still blocking the connection?
Should I completely remove all network connections from all machines and start over as if it were a new network since the original network was configured as peer-to-peer?
Is there something else I missed?