Virtual Server
Go to Advanced Setup Æ NAT Æ Virtual Server to set virtual server as needed (known as Port Mapping).
Virtual server opens the port(s) for specified service and maps the port(s) to the private IP address of the server. It allows remote users accessing services such as the Web or FTP at the local site via public IP address. In other words, it redirects the request from Internet to the local server which is configured with private IP address.
Some applications will require a set or a range of ports (example 4000~5000) to a specified local machine to route the packets. The router allows user to configure the needed port mappings to suit such applications.
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