Draytek Vigor 2820 User Manual page 72

Enable Open Ports
Comment
WAN Interface
Local Computer
Choose PC
Protocol
Start Port
End Port
66
Check to enable this entry.
Make a name for the defined network application/service.
Specify the WAN interface that will be used for this entry.
Enter the private IP address of the local host or click Choose PC to
select one.
Click this button and, subsequently, a window having a list of
private IP addresses of local hosts will automatically pop up. Select
the appropriate IP address of the local host in the list.
Specify the transport layer protocol. It could be TCP, UDP, or -----
(none) for selection.
Specify the starting port number of the service offered by the local
host.
Specify the ending port number of the service offered by the local
host.
Vigor2820 Series User's Guide