Originally Posted by
eloquence
I don't know why there's the claim that ICS doesn't work with XBox - I've used XBox live over an ICS connection - I'm sure I've seen some instructions on it from Microsoft if you hunt around (though I don't know where exactly). In fact, my XBox used to be connected to the net via another PC which bridged a wireless and wired connection, and the wifi connection gave connection to the other PC with ICS enabled which had a USB ADSL modem... not exactly the tidiest connection, but it worked. The XBox had an IP address like 192.168.0.5 and the gateway would have been set to 192.168.0.1.
Not sure what ports need to be open/forwarded for xbox live, if any, though.