Edimax Technology AR-7167WnB - Manual (Page 46)

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DMZ Host IP Address Enter a static IP Address to the DMZ Host. This IP
Address will be exposed to the Internet.
4.2.2.3.3. Virtual Server
Use the Virtual Server function when you want different servers/clients in your
LAN to handle different service/Internet application type (e.g. Email, FTP, Web
server etc.) from the Internet. Computers use numbers called port numbers to
recognize a particular service/Internet application type. The Virtual Server allows
you to re-direct a particular service port number (from the Internet/WAN) to a
particular LAN private IP Address and its service port number.
Parameter Description
Virtual Server for Show the Virtual Server setting is for single or multiple IP
Addresses.
Start Port Number Enter the start port number.
End Port Number Enter the end port number.