Billion Electric Company 400G User Manual
Billion 400G Router
Chapter 4: Configuration
69
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.
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.
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.
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
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
Add Virtual Server
Because NAT can act as a “natural” Internet firewall, your router protects your network from being accessed by
outside users when NAT is enabled – all incoming connection attempts will point to your router unless you
specifically created Virtual Server entries to forward those ports to a computer on your network.
outside users when NAT is enabled – all incoming connection attempts will point to your router unless you
specifically created Virtual Server entries to forward those ports to a computer on your network.
When your router needs to allow outside users to access internal servers, e.g. a web server, FTP server, Email
server or game server, the router can act as a “virtual server”. You can set up a local server with a specific port
number for the service to use e.g. web/HTTP (port 80), FTP (port 21), Telnet (port 23), SMTP (port 25), or POP3
(port 110), When an incoming access request for a specified port is received by the router, it will be forwarded to
the corresponding internal server.
server or game server, the router can act as a “virtual server”. You can set up a local server with a specific port
number for the service to use e.g. web/HTTP (port 80), FTP (port 21), Telnet (port 23), SMTP (port 25), or POP3
(port 110), When an incoming access request for a specified port is received by the router, it will be forwarded to
the corresponding internal server.