Netgear FVS336G 参照ガイド

Router and Network Management

8-7

•

Schedule. You can specify whether the rule is to be applied on the Schedule 1, Schedule 2, or 
Schedule 3 time schedule (see 

).

See 

 for the procedure on 

how to use this feature.

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, port triggering operates as follows: 

•

A PC makes an outgoing connection using a port number defined in the Port Triggering table. 

•

This VPN firewall 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 VPN firewall 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 

 for the procedure on how to use this feature.

The VPN firewall permits up to 25 IPsec VPN tunnels and 10 SSL VPN tunnels at a time. Each 
tunnel requires extensive processing for encryption and authentication. 

See 

” for the procedure on how to use IPsec 

 for the procedure on 

how to use SSL VPN.