I have a very simple network. There are 6 devices on an all-wired windows TCP/IP netowrk. There are 2 windows XP machines, one windows 2003 server, 2 windows 2000 machines and one playstation. There is a single SMC 8 port router attached to a cable modem. All machines on the network can see the network shares of the local network and access the shared directories and files. There is no DHCP running and all machines have their own ip address specified. There is a switch between the router and three of the machines and the rest are connected directly to the router. For some reason, the computers behind the switch are having difficulty accessing the internet. I cannot ping a domain name or external IP. All the other computers have no trouble accessing the internet. At times all of the computers have been able to access the internet, but now it has stopped. Unfortunately due to cable length, I cannot remove the switch to deeterine if ther is a problem with that. Any suggestions? I thought since all computers could see eachother that it wasn't a hardware issue, but I have no idea where to turn to for help with anything software related that might be blocking the access. All computers have current up to date antivirus software and anti bot programs running.