Port Forwarding is an application of NAT that redirects a communication request from one address and port number combination to another while the packets are traversing a network gateway, such as a router or firewall. This feature is commonly used to make services on a host residing on an external network available to hosts on the internal network by remapping the destination IP address and port number of the communication to an internal host.

A matching firewall RULE must be created for each port forward, unless you take advantage of Simple Rules (mentioned above).

Note: It is highly recommended to use a static IP address or DHCP reservations on any listed, port- forwarded, IP addresses.