Billion M500 User Manual page 99

Virtual Server
Note: This feature disables automatically if WAN connection is in BRIDGE mode.
The device can be configured as a virtual server so that remote users accessing services such as Web
or FTP services via the public (WAN) IP address can be automatically redirected to local servers in the
LAN network. Depending on the requested service (TCP/UDP port number), the device redirects the
external service request to the appropriate server within the LAN network.
Virtual Server for: Indicate the related WAN interface which allows outside network to connect in and
communicate.
Protocol: Choose the application protocol.
Start / End Port Number: Enter a port or port range you want to forward.
(Example: Start / End: 21 or Start: 1000, End: 2000).
The starting greater than zero (0) and the ending port must be the same or larger than the starting port.
Local IP Address: Enter your local server IP address in this field.
Start / End Port Number (Local): Enter the start / end port number of the local application (service).
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