Accton Technology CheetahAccess AC-IG1004, User Manual

Page: 36 / 96

Configuring the CheetahAccess Internet Gateway
4-12
Virtual Server
If you configure the CheetahAccess Internet Gateway 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 CheetahAccess Internet Gateway 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.