DGFV338 ProSafe Wireless ADSL Modem VPN Firewall Router Reference Manual
was made. When the application ceases to transmit data over the port, the router waits for a timeout interval and then closes the port or range of ports, making them available to other computers on the private network.
Once configured, the operation is as follows:
•A PC makes an outgoing connection using a port number defined in the Outgoing Port Triggering table.
•The ProSafe DGFV338 records this connection, opens the incoming port or ports associated with this entry in the Incoming Port Triggering table, and associates them with the PC.
•The remote system receives the PCs request and responds using the different port numbers that you have now opened.
•This Router matches the response to the previous request, and forwards the response to the PC.
•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.
•Only one PC can use a Port Triggering application at any time.
•After a PC has finished using a Port Triggering application, there is a
Note: For additional ways of allowing inbound traffic, see “Inbound Rules (Port Forwarding)” on page
To add a new port triggering rule:
1.Select Security from the main menu and Port Triggering from the submenu. The Port Triggering screen will display.
2.Enter the following data in the Add Port Triggering Rule fields:
a.Name – Enter a suitable name for this rule (for example, the name of the application)
b.Enable/Disable – Select the desired option from the
c.Outgoing (Trigger) Port Range – Enter the range of port numbers used by the application on the private network when it generates an outgoing request.
d.Incoming (Response) Port Range – Enter the range of port numbers used by the remote system when it responds to the PC’s request.
Security and Firewall Protection |