Compex Technologies 18A Manuel D’Utilisation

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To Setup Port Forwarding 
Port forwarding allows the router to redirect any incoming Internet 
request bearing a public IP address to a specific PC on your LAN, 
based on the incoming packet’s TCP/UDP port number. 
 
Hence, using TCP port forwarding, you can hide your web-server 
behind the access point for added security, while UDP port forwarding 
lets you run a secure multiplayer game server.   
 
The following diagram shows a router with a public IP address of 
203.120.90.3 and a private IP address of 192.168.168.1. Using 
appropriate port forwarding settings, all incoming packets with port 
number 80 will be forwarded to the web server, known on the LAN as 
192.168.168.5, while those with port number 21 can be directed to the 
FTP server, which has a private IP address of 192.168.168.8.