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It specifies a router port accessible to internet users. WAN port will be populated 
automatically after you select LAN port. 
It specifies the protocol of a service. If you are uncertain about which service 
protocol is used, TCP/UDP is recommended. 
It allows you to manually add or delete virtual server rules. 
10.10.1  Adding a Virtual Server Rule 
1.  To access the configuration page, click Advanced Settings > Virtual Server. 
2.  Internal IP Address: Enter the IP Address of the internal sever, which is 192.168.0.110 in this example. 
3.  LAN  Port:  Click  drop-down  list  box  and  select  internal  service  port  number  or  enter  the  number 
manually, which is 21 in this example.   
4.  Protocol: Click drop-down list box and select protocol of a service, which is TCP&UDP in this example. 
5.  Click +New. 
 
 
—End