NETGEAR JWNR2000v2 User Manual page 52

More than one local computer needs port forwarding for the same application (but not
•
simultaneously).
An application needs to open incoming ports that are different from the outgoing port.
•
When port triggering is enabled, the router monitors outbound traffic looking for a specified
outbound "trigger" port. When the router detects outbound traffic on that port, it remembers
the IP address of the local computer that sent the data. The router then temporarily opens the
specified incoming port or ports, and forwards incoming traffic on the triggered ports to the
triggering computer.
While port forwarding creates a static mapping of a port number or range to a single local
computer, port triggering can dynamically open ports to any computer that needs them and
can close the ports when they are no longer needed.
If you use applications such as multiplayer gaming, peer-to-peer
Note:
connections, real-time communications such as instant messaging,
or remote assistance (a feature in Windows XP), you should also
enable Universal Plug and Play (UPnP) according to the instructions
in
Click Apply. The service appears in the Port Triggering Portmap
table.
To configure port triggering, you need to know which inbound ports the application needs.
Also, you need to know the number of the outbound port that will trigger the opening of the
inbound ports. You can usually determine this information by contacting the publisher of the
application or user groups or newsgroups.
To set up port triggering:
Select Advanced > Port Forwarding/Port Triggering and then select the Port
1.
Triggering radio button. The port triggering information displays.
Clear the Disable Port Triggering check box.
2.
52 | Chapter 4. Content Filtering
NETGEAR N300 Wireless Router JWNR2000v2 User Manual
on page 54.