Draytek Vigor2930 Series User Manual page 56

Press any number under Index to access into next page for configuring port redirection.
Enable
Mode
Service Name
Protocol
WAN IP
Public Port
48
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).
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
Vigor2930 Series User's Guide