How would I allow only certain IP addresses to connect to me for Xbox Live? I did block all inbound rules and then added a custom rule to allow only certain IPs to connect to me, but some other people can still connect to me.
closed as off topic by Canadian Luke, Scott Chamberlain, ubiquibacon, Zoredache, Ƭᴇcʜιᴇ007 Jul 14 '12 at 23:30
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XBox Live uses a uPnP request from the XBox console to the router, then going through that connection to the xboxlive server.
I don't know exactly how it connects (hmm, new experiment!), but I'd imagine people's IP's are passed back and forth from the xboxlive connection, which the console then uses for another uPnP request (to the router) to make that connection.
It's kind of an all or nothing thing. You can block people in your profile, and actually set it to 'friends only', which would prevent random people from bothering you.