hey guy i have ahd my router for 1 year now , i have it hooked up to a comcast modem (newest cisco) and i have from the beginning had it setup on a DMZ with a static ip address and had no issues until a week ago and my xbox started telling me i have a double nat and i cant party chat . i have check all of my settings on my comcast router and also have done a factory reset on BOTH and started from scratch. i have even disable the ENTIRE firewall on my comcast router and when i hook up my xbox to my comcast router i get a open NAT , but as soon as i connect to my netduma its switchs to strict and double nat ???????