Configuring Port Triggering - NETGEAR WNDR3300 - RangeMax Dual Band Wireless-N Router Wireless Reference Manual

NETGEAR RangeMax™ Dual Band Wireless-N Router WNDR3300 Reference Manual
To make a local Web server public:
1. Assign your Web server either a fixed IP address or a dynamic IP address using DHCP address
reservation, as explained in
router always gives your Web server an IP address of 192.168.1.33.
2. Configure the Port Forwarding screen to forward the HTTP service to the local address of your
Web server at 192.168.1.33.
HTTP (port 80) is the standard protocol for Web servers.
3. (Optional) Register a host name with a Dynamic DNS service, and configure your router to
use the name as described in
To access your Web server from the Internet, a remote user must know the IP address that has
been assigned by your ISP. However, if you use a Dynamic DNS service, the remote user can
reach your server by a user-friendly Internet name, such as mynetgear.dyndns.org.

Configuring Port Triggering

Port triggering is a dynamic extension of port forwarding that is useful in these cases:
• 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.
Note: If you use applications such as multiplayer gaming, peer-to-peer 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
Fine-Tuning Your Network
"Using Address Reservation" on page
"Using a Dynamic DNS Service" on page
"Using Universal Plug and Play" on page
v1.0, February 2008
4-4. In this example, your
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