4.2. Nat (Network Address Translation)

A NAT rule has only 2 attribute: virtualand real. Virtual indicates the virtual item, usually a host with a public IP which has to be redirected towards a real item (usually a host situated in dmz). Hosts indicated by "virtual" and "real" have, of course, to be previously defined.

To create a new NAT rule you have to select "Create new NAT" Nat and Masquerading section. Now set the virtual item, then the real one towards which the traffic must be redirected.