Netgear 12400218 Benutzerhandbuch

The Block Services Setup screen displays:

From the Service Type list, select the application or service to allow or block. 

The list displays several common services, but you are not limited to these choices. To 
add any additional services or applications that do not already appear, select User 
Defined.

If you know that the application uses either TCP or UDP, select the appropriate protocol. If 
you are not sure, select Both.

Enter the starting and ending port numbers. 

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 
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.

Your changes are saved. 

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 have to also allow 
incoming traffic on port 113 to reach the originating computer.” Using steps similar to the