+ 0 Votes Reponse To Answer gechurch January 24, 2013 at 9:15pm PST Well done so far Matt. Firstly, you should follow normal troubleshooting steps for Internet issues. Is the DSL/line sync light on? Can you log into the modem and run ping diagnostics from there? Ping a domain (google.com will reply) and an IP (like 8.8.8. to check whether it's just DNS that's not working, or is a fault with the Internet connection itself. How do you physically have things hooked up? In the setup I described I'm expecting that all devices will be able to see each other (ie. plugged into a single switch). You shouldn't have, as an example, the modem plugged into one network card in the server, and the rest of the network plugged in to a different network card. You should ping the modem's IP from the server/desktops to ensure they can see the modem.