D-Link DFL-300 - Security Appliance User Manual page 147

Setting the Virtual Server's services:
Step 1. For the Virtual Server which has already been set up with an IP
address, click the New Service button in the table.
Step 2. In the Virtual Server Configurations window:
Virtual Server IP: displays the external IP address assigned to the
Virtual Server
External Service Port: select the port number that the virtual
server will use. Changing the Service will change the port number
to match the service.
Service: select the service from the pull down list that will be
provided by the Virtual Server.
Note: The services in the drop-down list are all defined in the Pre-defined
and Custom section of the Service menu.
Step 3. Enter the IP address of the internal network server(s), to which the
virtual server will be mapped. Up to four IP addresses can be
assigned at most.
Step 4. Click OK to save the settings of the Virtual Server.
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