Very recently I've been unable to find PMS from my Xbox360, and the Xbox does not show up in the list of renderers. I suspect it has something to do with my router, but I'm not sure what to try to fix it. My setup is as follows:
Copmuter (ethernet, 192.168.1.149)---> WB N600 --->Xbox (wifi, 192.168.1.108)
I've tried opening the default port (5001), and I can see the line "INFO 2013-07-31 23:52:10.581 [UPNPHelper] No IP filter specified, access granted to /192.168.1.108", but it is still as if the Xbox cannot see PMS and vice versa.
debug.log from the snapshot build: http://pastebin.com/mL9nvmzn