Draytek Vigor 2110 Series User Manual page 40

Press any number under Index to access into next page for configuring port redirection.
Enable
Mode
Service Name
Protocol
Public Port
Private IP
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).
32 Vigor2110 Series User's Guide