Draytek Vigor 2110 User Manual page 122

Mode
Service Name
Protocol
WAN IP
Public Port
Private IP
Private Port
After finishing all the settings here, please click OK to save the configuration.
Note that the router has its own built-in services (servers) such as Telnet, HTTP and FTP etc.
Since the common port numbers of these services (servers) are all the same, you may need to
reset the router in order to avoid confliction.
For example, the built-in web configurator in the router is with default port 80, which may
conflict with the web server in the local network, http://192.168.1.13:80. Therefore, you need
to change the router's http port to any one other than the default port 80 to avoid conflict,
such as 8080. This can be set in the System Maintenance >>Management Setup. You then
will access the admin screen of by suffixing the IP address with 8080, e.g.,
http://192.168.1.1:8080 instead of port 80.
Two options (Single and Range) are provided here for you to
choose. To set a range for the specific service, select Range. In
Range mode, if the public port (start port and end port) and the
starting IP of private IP had been entered, the system will
calculate and display the ending IP of private IP automatically.
Enter the description of the specific network service.
Select the transport layer protocol (TCP or UDP).
Select the WAN IP used for port redirection. There are eight
WAN IP alias that can be selected and used for port
redirection. The default setting is All which means all the
incoming data from any port will be redirected to specified
range of IP address and port.
Specify which port can be redirected to the specified Private
IP and Port of the internal host. If you choose Range as the
port redirection mode, you will see two boxes on this field.
Simply type the required number on the first box. The second
one will be assigned automatically later.
Specify the private IP address of the internal host providing the
service. If you choose Range as the port redirection mode, you
will see two boxes on this field. Type a complete IP address in
the first box (as the starting point) and the fourth digits in the
second box (as the end point).
Specify the private port number of the service offered by the
internal host.
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Vigor2110 Series User's Guide