ConnectGear WR400 - Manual (Page 54)

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2.5.2 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 Port) to a particular LAN private IP address and its service port number. (See
Glossary for an explanation on Port number)
Parameters Description
Private IP
This is the LAN client/host IP address that the Public Port
number packet will be sent to.
Note: You need to give your LAN PC clients a fixed/static IP
address for Virtual Server to work properly.
Private Port
This is the port number (of the above Private IP host) that the
below Public Port number will be changed to when the packet
enters your LAN (to the LAN Server/Client IP)
Type
Select the port number protocol type (TCP or UDP). If you are
unsure, then leave it to the default TCP protocol.