Port Triggering To Open Incoming Ports - NETGEAR R7000 User Manual

The Block Services Setup screen displays:
From the Service Type list, select the application or service to allow or block.
5.
The list displays several common services, but you are not limited to these choices.
(Optional) To add services or applications that are not in the list, select User Defined.
6.
If you know that the application uses either TCP or UDP, select the appropriate protocol. If
7.
you are not sure, select TCP/UDP (both).
Enter the starting and ending port numbers.
8.
If the application uses a single port number, enter that number in both fields.
Select the radio button for the IP address configuration you want to block, and enter the IP
9.
addresses.
You can block the specified service for a single computer, a range of computers with
consecutive IP addresses, or all computers on your network.
Click Add.
10.
Your changes are saved.

Port Triggering to Open Incoming Ports

Some application servers (such as FTP and IRC servers) send replies to multiple port
numbers. Using the port triggering function of your router, you can tell the router to open
more incoming ports when a particular outgoing port originates 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." Using steps similar to the
preceding example, the following sequence shows the effects of the port triggering rule you
have defined:
R7000 Smart WiFi Router
Security
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