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Port Filtering
Port Filtering allows you to block outgoing Internet connections and permit only allowed
applications to access the Internet. You can also customize a list of allowed applications which
permits only certain programs to connect to the Internet.
Be sure to click Save Changes button to ensure that your new settings are saved.
The Port Filtering menu contains the following options:
• DMZ – Use the Demilitarized Zone (DMZ) to allow all traffic from outside the firewall for a
connected device that has a specific local IP address assigned as DMZ. It is
recommended to disable DMZ unless urgently needed.
• Port Filtering - Click ON to turn on Port Filtering. When the feature is ON, you must
select a port filtering application in the Applications list to allow that application to
connect to the Internet. For example, if you select VPN in the Applications list, but do
not select HTTP, you can connect a VPN server but you cannot connect to a web page
using your Internet browser. Click OFF to turn off Port Filtering. When the feature is
OFF, any application can connect to the Internet.
Turning ON the Port Filtering feature reflects the following options:
• Applications – Select each port filtering application that needs to be able to access
the Internet by checking the box in front of one or more applications. When port
filtering is turned ON, all other applications are blocked.
• Custom Applications – You can define your own applications, and then turn them
on or off as needed. To define an application, you need to know the outgoing ports
used by the application.
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