The ESET firewall acts as a network traffic filter that regulates communication within the local network or internet. Using predefined rules, the firewall analyzes network communication and decides whether or not to allow it. You can configure your firewall to allow or block certain applications.
Make sure that Auto with exceptions is selected from the Filtering Mode drop-down menu and click Add.
Select the application that you want to block and then click Select. This example demonstrates creating a rule to deny all online communications for FaceTime. You can create a rule to block any application on your device.
Next to Destination, select where your rule will be applied: to the entire Internet, to your local network, or to a specific subnet or IP address range. Select Entire Internet to create a rule that will be applied everywhere so that your application will always be allowed. Click Finish to create your new rule, and then close the Firewall window to return to the main program window.