AppCtrl port enforcement check

AppCtrl port enforcement check

Most networking applications run on specific ports. For example, SSH runs on port 22, and Facebook runs on port 80 and 443.

If the default network service is enabled in the application control profile, a port enforcement check is done at the application profile level, and any detected application signatures running on the non-standard TCP/IP port are blocked.

This means that each application allowed by the app control sensor is only run on its default port.

To set port enforcement check in the CLI:

config application list edit “default_port” set enforce-default-app-port {enable | disable}

disable       Disable default application port enforcement.

enable        Enable default application port enforcement.

config entries edit 1 set application 15896 set action pass

next

end

next

end

For example, when applying the above appctrl sensor, FTP traffic with the standard port (port 21) is allowed, while the non-standard port (port 2121) is blocked.


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