Draytek Vigor2800 Series User Manual page 40

Service Name
Protocol
Public Port
Private IP
Private Port
Active
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's 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.
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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.
Specify the private IP address of the internal host providing the
service.
Specify the private port number of the service offered by the internal
host.
Check this box to activate the port-mapping entry you have defined.
Vigor2800 Series User's Guide