NetComm NB6 User Manual page 70

For example, if you choose Audio/Video in the first field, the corresponding contents of the second
field would be like the drop-down list shown as the following figure.
User defined:
Type a new service name for building a customized service for specific purpose.
There are three lines that you can enter settings into on this page. If you need more lines, just apply
the settings and then add a new port forwarding rule.
From Internet Host IP Address:
Select the initial place for port forwarding. If you choose SINGLE, a box will appear for you to
fill in the IP address for the specific host. And, if you choose SUBNET, the boxes for IP address
and Netmask will appear for you to fill in the IP address and subnet mask for the specific
subnet.
Forward to Internal Host IP Address:
Key in the address for the host used as the destination that information will be forwarded to.
For example, select the predefined application name Audio/Video – Media Player 7, set from
ALL internet host IP addresses, and forward to 192.168.1.200. Click Apply. Be sure to reboot
your router for these changes to take effect.
The result will be displayed as the following figure.