Netgear FVX538v1 – ProSafe VPN Firewall Dual WAN with 8-Port 10/100 and 1 Gigabit LAN Port Switch 参照マニュアル

Firewall Protection and Content Filtering

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To remove an entry from the table, select the IP/MAC Bind entry and click Delete. 

Port triggering allows some applications running on a LAN network to be available to external 
applications 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: 

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

2. The 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. 

3. The remote system receives the PCs request and responds using the different port numbers that 

you have now opened. 

4. The 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 this Router cannot be sure 
when the application has terminated.

To add a Port Triggering Rule:

1. Select Security from the main menu and Port Triggering from the submenu. The Port 

Triggering screen will display.

1. Enter a user-defined name for this rule in the Name field.

2. From the Enable pull-down menu, indicate if the rule is enabled or disabled. 

Note: For additional ways of allowing inbound traffic, see 

.