This is an old question, but it deserves an answer. I hope you are still interested LiBOC.

All Broadband routers use Dynamic NAT. Very few users will ever use Static NAT, but Static NAT features are available on most routers. The Static NAT feature can be seen in the DMZ settings for your router. Putting a computer in the DMZ will remove it from behind the Dynamic NAT wall and will expose all of this computer's ports to the WAN connection. This could be useful for running servers in, but I still prefer to keep server systems behind the Dynamic NAT wall.