With this function, you can map an external port to an internal port, so that applications using the internal port (such as a web server) are accessible from the internet.

 

To access the configuration page, log in to the web UI of the router, and choose More > Advanced > Port Mapping.

An example of configuring port mapping Scenario: You want to share some large files with your friends who are not on your LAN. 

However, it is not convenient to transfer such large files across the network. 

Goal: Set up your own PC as an FTP server and let your friends access these files. 

Solution: You can configure the port mapping function to reach the goal. 

Assume that: IP address of the FTP server: 192.168.0.100 

User name and password of the FTP server: admin 

Port of the FTP server: 21 

IP address of the WAN port: 172.16.200.72

To achieve such a goal: 

 1 Log in to the web UI. 

 2 Choose More > Advanced > Port Mapping. 

 3 Click  . 

 4 Select your computer for Select Device, 21 (FTP) for Internal Port, and TCP&UDP for Protocol. 

TIP:

You can directly select a client from the drop-down list box, which requires no further settings on Internal IP Address. If you select Manual, you need to set Internal IP Address manually.

5 Click OK.

Now your friends can access your files by visiting ftp:// 172.16.200.72 using their computers with internet access.