Tenda W300D User Manual page 60

External Port：
This is the external port number for server or
Internet application, for example, port 21 for
ftp service.
Internal Port:
This is the port number of LAN computer set
by the Router. The Internet traffic from the
external port will forward to the internal port.
For example, you can set the internal port
NO.66 to act as the external port NO.21 for
ftp service.
IP Address:
Enter the IP address of the PC where you
want to set the applications.
Protocol:
Select the protocol (TCP/UDP/Both) for the
application.
Enable：
Only click this option to make this rule go into
effect.
Delete：To delete this rule.
In Well-known Service Port, list the common ports,
you can select one from them and add one ID number
from the drop-down menu, click "Add" to add the port
in the above table. If the port does not list in the
Well-known service port drop-down menu, you can
W300D Wireless-N ADSL2+ Router
55