Everything TwinkleSpark said is spot-on. I just wanted to give this one tip. If you have any issues with setting up your router's firewall, I recommend http://portforward.com/english/routers/port_forwarding/routerindex.htm To use it, just find your router information in the list and look at the firewall setup guide for Team Fortress 2. The instructions are really easy to follow. The reason I recommend this is because sometimes different routers have different settings and restrictions. If the GUI looks different between setup and what the site shows, don't worry about it. The information is all accurate, but the site simply shows an older or different GUI. Have fun! EDIT: Just noticed your router information and looked up the page for you. Just click on the link for whatever program you're trying to use: http://portforward.com/english/routers/port_forwarding/Ubee/EWV3200/