I am having a problem with a "strict" NAT type. I already contacted Microsoft Support, and they led me through steps of "port forwarding" even after telling them I had already done so, to no avail. I have gotten a new router and the same issue still occurs. If my wired connection is linked directly into the modem, my NAT changes to "open" but this cuts off internet service to other devices, which makes this option unrealistic.
Newer Router: Linksys WRT160Nv2
Previous Router: NetGear
Modem: Speedstream 5200
Help much needed,