HELP! I have an airport router, how do I change the NAT so I can play games

Hi,

I always get messages that my NAT is too restrictive and I cannot play certain games online because my NAT isn’t compatible or open enough… I know how to use the Airport Extreme software to edit the NAT, but what exactly do I edit to have a less strict NAT?

If someone could help me, it’d be much appreciated…

Thank you,
Mark