NetComm NB6 User Manual page 69

IP Address seen by Internet Users
Once configured, anyone on the Internet can connect to your Virtual Servers.
Please note that, in the above picture, both Internet users are connecting to the same IP address, but
using different protocols, such as Http://203.70.212.52 and Ftp://203.70.212.52.
To Internet users, all virtual servers on your LAN have the same IP Address. This IP Address is allocated
by your ISP. This address should be static, rather than dynamic, to make it easier for Internet users to
connect to your Servers. However, you can use Dynamic DNS feature to allow users to connect to your
virtual servers by using a URL, instead of an IP address.
IP addresses can be automatically redirected to local servers configured with private IP addresses. In
other words, depending on the requested service (TCP/UDP port number), the router redirects the
external service request to the appropriate server (located at another internal IP address).
Add New Port Forwarding
To set a virtual server, please open the Virtual Server item from the Advanced setup menu.
To add a new Port Forwarding, please click Add from the Port Forwarding web page.
Pre-defined:
Choose one of the service types from the first drop-down list, such as Audio/Video, Games, and so on.
In the second drop-down list, choose the name of the application that you want to use with the type
that you select in the first list.