You need to have a static ip, open/forward the ports for PS3 ( here! ), then go to portforward, pick your router, pick the game, in this case Call of Duty: Modern Warfare 3, and follow the easy instructions, or get someone who knows their way around a router. Is your wireless box the model TG585n, by any chance, cause if it is , it's a Thomson. Before setting up port forwarding for an HTTP server, a PC on the Internet cannot connect to your server/PC via HTTP. Under the Basic Config section, select " HTTP " from the " Famous Server List " item. Input a port or port range for the HTTP server and select the Local IP. In this example, the Server LAN IP address is " 192.168.1.103 ".