in control panel you can but you can brige the dial-up internet with the ethernet port on your pc and hook it up but that wont work for xbox live. you have to have dsl or cable. the only thing you can bridge is dial-up(phone line) to ethernet.
If you connect the xbox directly to the router, it will work, but i dont think you can hook the xbox up to your computer to recieve internet access. I tried it and my computer wouldn't read the xbox, because it is not a computer with windows.
Hey I force host in halo2 I know what he is talking about if you have any questions just pm me I can explain the WHOLE prcess even give you bungies IP adress. but you will need either zone alarm pro or a ripped copy (not that i am encouraging that)