Billion 800VGT Router
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.
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.
Time Schedule: The
Application: A 
to select existing predefined rules.
: 20 predefined rules are available. Click the Radio button to select the rule; Application, Protocol and External/Redirect Ports will be automatically filled in after the selection.
Protocol: This is the protocol supported by the virtual server. In addition to specifying the port number to be used, you will also need to specify the protocol used. The protocol used is determined by the particular application. Most applications will use TCP or UDP.
External Port: The Port number on the Remote/WAN side used when accessing the virtual server.
Redirect Port: The Port number used by the Local server in the LAN network.
Internal IP Address: The private IP in the LAN network, which will be providing the virtual server
application. 
List all existing computers currently connected to the network. You may assign a computer with an IP address or a MAC address from this list.
