I know this is a common problem, but mine seems somewhat unique. My friends and I are trying to use our Macbook Pros to get Xbox Live in our dorm room at college. We've tried the official Xbox Wireless Router to use the college network, but it won't support it. The IT dept. said the only way was through internet sharing. We've manually assigned the Xbox with the IP address we find using ifconfig en0 in the terminal and used the +1 at the end for the Xbox's IP address. We also have the subnet at 255.255.255.0 and that works fine. The gateway we use is just the IP address of our Macbook. This all works fine, and the IP address is confirmed when testing Xbox Live. The problem lies in the DNS. We found our DNS server numbers through the Macbook and through the IT dept, but when we manually assign these, it still won't confirm it. Is there something that needs to be done through the System Prefs to get this to work? We've tried a lot of things like turning off DHCP and assigning the computer with another IP address, but nothing works. Can someone walk us through step by step and/or give us some screenshots of what our settings need to be in System Prefs? Any help is greatly appreciated, we're extremely frustrated at this point and we've tried nearly everything. Also, would getting XP and running boot camp possibly help compatibility problems with the Xbox?