Draytek Vigor2110 Series User Manual page 57

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