Netgear DGND3300 [43/174] Port triggering

Security Settings

N300 Wireless Dual Band ADSL2+ Modem Router DGND3300v2

2. Select the Custom Rule radio button, and the screen changes:

3. In the Service Name field, enter a name.

4. In the Service T

ype list, select the protocol. If you are unsure, select TCP/UDP.

5. Fill in the Sta

rting Port and Ending Port fields.

6. In the Server IP Address field,

enter the IP address of your local computer that will provide

this service.

7. Click Appl

y. The service appears in the list.

Port Triggering

Port triggering is an advanced feature that can be used to easily enable gaming and other

Internet applications that would otherwise be blocked by the firewall. Using this feature

requires that you know the port numbers that are used by the application.

Note: For information about port forwarding and port blocking, see

Firewall Rules on page 38.

Once configured, port triggering operates as follows:

1. A computer ma

kes an outgoing connection using a port number defined in the Port

Triggering table.

2. The N300 wireless modem

router records this connection, opens the incoming port or ports

associated with this entry in the Port Triggering List, and associates them with the computer.

3. The remote system receives the

computer’s request, and responds using a different port

number.

4. The N300

wireless modem router matches the response to the previous request, and

forwards the response to the computer. (Without port triggering, this response would be

treated as a new connection request rather than a response. As such, it would be handled

in accordance with the port forwarding rules.)