I''ve been trying for some 10 hours to get XBOX Live working. I've tried auto for DNS, but it fails every time - it looks as if it finds the server address but doesn't get a response. I've also tried manually setting the DNS address, but it still fails. I['ve opened the neccessary ports in the firewall as well.
I am using the Vigor 2600 Plus modem/router, and a Belkin wireless access point, with the XBOX wirless network adaptor.