XBL with a router?

[rms2001]

I'm taking a trip back to Oregon on monday, and my buddy Rob has XBL. While I was there last time I set up a linksys router to share the cable internet on all his computers. I called to tell him I would be in town, and he said XBL wouldnt work while his XBox was plugged into the switch witch is pluged into the router.

So what I need to know is, does any one know what ports need to be open to allow XBL to still work behind a router?

Thnkas
rms2001

[JiveTurkey]

Hmm.. I'm pretty sure that XBL actually tracks your Xbox MAC address so when you try to go Live its looking at your router's MAC instead. Most routers have a feature that will forward an address other than their own usually called ghosting or cloning or such that would fix this. I would think thats more likely than wrong or closed port but I dont use Live.