Virtual Server (Known As Port Forwarding) - Billion 800VGT User Manual

Billion 800VGT Router
Sometime your customers or friends may upload their files to your FTP server and that will saturate your
downstream bandwidth. The settings below will help you to limit bandwidth for such a application that
needs restriction.

Virtual Server (known as Port Forwarding)

In TCP/IP and UDP networks, a port is a 16-bit number used to identify which application program
incoming connections should be delivered to. Some ports have numbers that are pre-assigned to them by
the IANA (the Internet Assigned Numbers Authority), and these are referred to as "well-known ports".
Servers follow the well-known port assignments so clients can locate them.
If you wish to run a server, or any application (e.g. Peer-to-peer/P2P software such as instant messaging
applications and P2P file-sharing applications) on your network that can be accessed from the WAN (i.e.
from machines on the Internet that are outside your local network, and you are using NAT (Network
Address Translation), then you will need to configure your router to forward these incoming connection
attempts using specific ports to the computer on your network that is running the application/server. You
will also need to use port forwarding if you want to host an online game server.
The reason for this is that when using NAT, your publicly accessible IP address will be used by and point
to your router, which then needs to deliver all traffic to the private IP addresses used by your PCs. Please
see the WAN configuration section of this manual for more information on NAT.
The device can be configured as a virtual server so that remote users accessing services such as Web or
FTP services on the routers public (WAN) IP address can be automatically redirected to local servers on
the LAN network. Depending on the requested service (TCP/UDP port number), the router redirects the
external service request to the appropriate server within the LAN network
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Chapter 4: Configuration