I have recently got internet hooked up via a business partner. My internet is run of a radio transmitter on my roof to the tower on his office about 1.2 km away. I have a dedicated 7MBPS sustained and 4 MBPS Upload. On xbox live I get an error stating that my nat is moderate and that my "experience will be down graded. My provider doesnt use a NAT at all. Ive tried, DMZ, Port Forwarding, QoS, Application Rules, Upnp. Restored factory settings on my xbox, restored factory settings on my router. Ive noticed some lag and slow downs, I know its not my connection since I have 7mbps dedicated at all times for one xbox and 4 mbps upload. So im thinking there is a block somewhere. What exactly does the NAT do and how big of a factor is it. Any advice would be great. Oh and my router is a DIR-850L
oh and I am hardwired to the router.