findout which port is going to the xbox, then go into your router via http://192.168.0.1 and login. from there, asign the IP for the port that you designated to the xbox, and always use that port for the xbox. any questions, more...
by the router?Connect the router to computer? It will automatically install the router and generate the Port for the internet connection? After this just login in to the router and change the setting by which the ISP gives you (IP Address) restart the router for setting applied after this more...