NETGEAR Nighthawk X8 5 User Manual page 170

4. Select ADVANCED > Advanced Setup > Port Forwarding/Port Triggering.
The Port Forwarding/Port Triggering page displays.
5. Select the Port Triggering radio button.
6. Clear the Disable Port Triggering check box.
If this check box is selected, the router does not use port triggering even if you specified port triggering settings.
7. In the Port Triggering Timeout field, enter a value up to 9999 minutes.
This value controls how long the inbound ports stay open when the router detects no activity. This value is
required because the router cannot detect when the application terminates.
8. Click the Apply button.
Your settings are saved.
Application Example: Port Triggering for Internet Relay Chat
Some application servers, such as FTP and IRC servers, send replies to multiple port numbers. Using port triggering,
you can tell the router to open more incoming ports when a particular outgoing port starts a session.
An example is Internet Relay Chat (IRC). Your computer connects to an IRC server at destination port 6667. The
IRC server not only responds to your originating source port but also sends an "identify" message to your computer
on port 113. Using port triggering, you can tell the router, "When you initiate a session with destination port 6667,
you must also allow incoming traffic on port 113 to reach the originating computer." The following sequence shows
the effects of this port triggering rule:
1. You open an IRC client program to start a chat session on your computer.
2. Your IRC client composes a request message to an IRC server using a destination port number of 6667, the
standard port number for an IRC server process.Your computer then sends this request message to your router.
3. Your router creates an entry in its internal session table describing this communication session between your
computer and the IRC server. Your router stores the original information, performs Network Address Translation
(NAT) on the source address and port, and sends this request message through the Internet to the IRC server.
Nighthawk X8 AC5300 Tri-Band WiFi Router
Customize Internet Traffic Rules for Ports
170