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If you configure the Wireless Barricade Plus as a virtual server, remote
users accessing services such as Web or FTP at your local site via public IP
addresses can be automatically redirected to local servers configured with
private IP addresses. In other words, depending on the requested service
(TCP/UDP port number), the Wireless Barricade Plus redirects the
external service request to the appropriate server (located at another
internal IP address).
The WAN interface must have a fixed IP address to utilize this
function. For example, if you set Type/Public Port to TCP/80
(HTTP or Web) and the Private IP/Port to 192.168.2.2/80, then all
HTTP request from outside users will be transferred to 192.168.2.2.
Therefore, by just entering the IP Address provided by the ISP,
Internet users can access the service they need at the local address
to which you redirect them.
Some of the more common TCP service ports include:
HTTP: 80, FTP: 21, Telnet: 23 and POP3: 110.