How do I change my NAT type vol. Xbox live

[beezylocks]

Been tryna play this halo but in lagging super hard because my NAT type is strict or moderate. Help me please
I have a Motorola router that U-verse gave me.
Thanks

 

[Ja's 2¢]

http://support.xbox.com/en-US/xbox-live/connecting/nat-type-strict
Read that to set the nat in your router