Microsoft MN 500 - Broadband Networking Wireless Base Station Router, User Manual, Page: 72 / 100

66 Microsoft Broadband Networking Base Station User’s Guide
This enables transmission of some of the more common data sent
to and from the Internet, such as e-mail messages and Web
browser data.
To run applications with special network requirements or to
establish a virtual server, however, you may need to change the
port configuration on the base station. You can configure, or
forward, ports from the Base Station Management Tool.
Application-Triggered Port Forwarding
Some applications, such as Internet games and videoconferencing,
require multiple ports for data transmission. File Transfer Protocol
(FTP) data, for example, is sent from your computer to one port
and returns to another port. These multiple port transmissions may
cause problems when the base station is set to routing mode so
that NAT is enabled on your base station, because the NAT service
anticipates that data sent to one port will return to the same port.
The Broadband Networking Wireless Base Station has already
been configured to accommodate some common application
protocols that require multiple ports, including FTP, Simple Mail
Transfer Protocol (SMTP), and Post Office Protocol 3 (POP3).
To configure port forwarding for other applications that require
multiple ports, you must specify the outbound (destination) port to
which data following a particular protocol will be sent, and the
inbound (source) port or ports to which related data will return.
Essentially, you are telling the base station how to direct traffic
across the networks.
The inbound ports that you specify will open only when data is sent
to the corresponding outbound port. These ports will close again
after a certain amount of time has elapsed with no data sent to
the inbound port. You can set ranges of ports, multiple ports, and
combinations of single and multiple ports for the inbound ports.
You can configure the base station to accommodate up to 20
applications. To identify the protocol that an application uses and
the ports to which the data should be sent, consult the
documentation for that application.
To establish application-triggered port forwarding
1. Open the Base Station Management Tool, and then click
Security .
2. On the Security menu, click Port Forwarding , and then click
Set up application-triggered port forwarding .
3. In the available Description box, type a description of the
application that you want to enable.
4. In the Outbound port box, type the number of the outbound
port. The outbound port should be one number between 0 and
65535. To determine which port the application uses, consult
the documentation for the application.