Philips CPWBS001 - Manual (Page 44)

Virtual Server
If you configure the Wireless Base Station 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 Base Station redirects the external
service request to the appropriate server (located at another internal IP
address).
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 requests from outside
users will be transferred to 192.168.2.2 on port 80.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.
The more common TCP service ports include:
HTTP: 80, FTP: 21,Telnet: 23, and POP3: 110
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