Draytek Vigor 2110 Series User Manual page 94

Enable
Mode
Service Name
Protocol
Public Port
Private IP
Private Port
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.
Check this box to enable such port redirection setting.
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).
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.
86 Vigor2110 Series User's Guide