Static Nat ? port forward ? issue - novice

Hi if you can help a novice Id appreciates it.

I have a 1800 series router with 2 Fast Ethernet Interfaces:

External and Internal

External IP - Internet

Internal IP addressing class C (say 192.168.10.0)

As I understand the router is doing Nat overload so with an access list

What I would like to do is to forward requests on the external interface to an Internal server.

External IP:80 - internal 192.168.10.1:80 (For example)

If someone could help me or point me in the right direction Id appreciate it - also what is the correct terminology for what I want to accomplish? Would it be a static Nat?

Many thanks

Craig.