LevelOne WAP-8131 Web Management Manual page 51

Port Mapping (Port Forwarding)
In computer networking, port forwarding or port mapping is an application of network address
translation (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 technique is most commonly used to make services on a host residing on a protected
or masqueraded (internal) network available to hosts on the opposite side of the gateway (external
network), by remapping the destination IP address and port number of the communication to an
internal host.
Network Architecture Diagram Example
1. To configure Port Mapping for internal NAS1
l Through the Port Mapping function, service transport protocol port number 5001 to 8701, by
remapping the destination IP address and port number of the communication to an internal
NAS1 (192.168.188.235).
51