Netgear V2 How Do I Open My Nat Connection For My Netgear WGT624 V2 Router?

How do I open my nat connection for my netgear WGT624 v2 router? - netgear v2

I can be a router WGT624 and I wonder how I unlock it to play on Xbox Live. It is nice to have a strict NAT and I can not find anything that helps me in my router.