This is sort of technical but I put it here because I think this is a common problem
I've been having this problem for a long time and I swear its getting worse and worse. My NAT type will not stay open. It always goes to moderate and never strict. I have went into my routers settings and even opened the three ports for xbox live and assigned an IP address and made sure that the 360 ip matches. This used to work but only temporarily. Everything seems to stay the same as it was but it just goes moderate. The ip still matches. I tried everything to keep it open but it always after a couple days goes back to moderate making it near impossible to play with a party of six all having similar problems. Does anyone here have any info about this other than what xbox support provides. I'm looking for a permanent fix. Also, I know this wouldn't make much sense but is this problem specific to modern warfare 2?