Netgear DGFV338 DGFV338 Reference Manual - Page 154
Port Triggering, VPN Tunnels, Using QoS to Shift the Traffic Mix
View all Netgear DGFV338 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 154 highlights
DGFV338 ProSafe Wireless ADSL Modem VPN Firewall Router Reference Manual See "Using Rules to Block or Allow Specific Kinds of Traffic" on page 4-1 for the procedure on how to use this feature. Port Triggering Port triggering allows some applications to function correctly that would otherwise be partially blocked by the firewall. Using this feature requires that you know the port numbers used by the Application. Once configured, operation is as follows: • A PC makes an outgoing connection using a port number defined in the Port Triggering table. • This Router records this connection, opens the additional INCOMING port or ports associated with this entry in the 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 time-out period before the application can be used by another PC. This is required because the firewall cannot be sure when the application has terminated. See "Setting up Port Triggering" on page 4-28 for the procedure on how to use this feature. VPN Tunnels The wireless firewall permits up to 50 VPN tunnels at a time. Each tunnel requires extensive processing for encryption and authentication. See Chapter 5, "Virtual Private Networking" for the procedure on how to use this feature. Using QoS to Shift the Traffic Mix The QoS priority settings determine the priority and, in turn, the quality of service for the traffic passing through the firewall. The QoS is set individually for each service. • You can accept the default priority defined by the service itself by not changing its QoS setting. 6-6 Router and Network Management v1.0, April 2007