Draytek Vigor2620 LTE Series User Manual page 139

Available settings are explained as follows:
Item
Enable
Mode
Service Name
Protocol
WAN Interface
Public Port
Source IP
Private IP
Private Port
After finishing all the settings here, please click OK to save the configuration.
Vigor2620 Series User's Guide
Description
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 all intefaces.
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.
Enter the required number on the first box (as the starting
port) and the second box (as the ending port).
Use the drop down list to specify an IP object. Or click IP
Object link to create a new one for applying.
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). The second
one will be assigned automatically later.
Specify the private port number of the service offered by the
internal host.
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