[quote name='LinkinPrime']I can't figure out why my X360 warns me that my NAT is strict...I have a static IP address and I have the ports opened...it was fine for a few months and all of a sudden I'm playing on a strict NAT :/[/QUOTE]
It can be your router, I forwarded my ports and did some DMZ thing and yet mine is still NAT strict. After calling the 360 support they said they didn't support that router. Whether that was them not knowing what was wrong or some ploy to get kickback from someone or the truth, I don't know.
Because of this, I can't;
Host parties
Initiate chat sessions
Host games
And a few other things