How to Block An Application from Accessing the Internet with Windows Firewall?

Although we’ll be demonstrating this trick on Windows 10, the basic layout and premise has remained largely unchanged over the years and you can easily adapt this tutorial to earlier versions of Windows.
So lets Begin:-

    • To create a Window Firewall rule, you first need to open up the advanced Firewall interface. To do so navigate to the Control Panel and select Windows Firewall to bring up the basic Firewall interface like so.
      • There you click on “Advanced settings” to access the advanced Firewall interface (alternatively, you can search for “firewall” with the Start Menu search and select “Firewall with Advanced Security” to jump right to the menu).
         

      • Select “Outbound Rules”. This will pull up all the existing outbound firewall rules (don’t be surprised that it is already populated with dozens and dozens of Windows-generated entries).

      • Select “New Rule…” to create a new rule for outbound traffic.

      • By default the rule type selection should be “Program”, but confirm that it is before clicking “Next”.

      • Here you will insert the path to the program you wish to block. For the purposes of this tutorial we’re going to block a portable copy of the Maxthon web browser as it will be easy to demonstrate to you that the browser is blocked. Click the “Browse” button and browse to the application on your computer.

      • Once you’ve selected your application and confirmed the path, click “Next”.
      • On the next screen confirm that “Block the connection” is selected. Click “Next”.

      • On the next page you’ll be asked to select when the rule applies (by default all three items are checked). It’s important to note that this option determines when the rule is in effect and not what the rule effects. For example, if you check “Public” but not “Private” that doesn’t mean the application can access resources on the local network but not on the public Internet. The options here are for determining whether or not the rule is applies based on whether or not the computer is connected to what you’ve defined as a public or private network.So, for example, if you have a laptop that you use at home (a network you’ve defined as private) and at a coffee shop (a network you’ve defined as public) and you want the rule to apply to both places you need to check both options. If you want the rule to only apply when you’re at the public Wi-Fi spot at the coffee shop, then just check Public. When in doubt just check them all to block the application across all networks. When you’ve made your selection click “Next”.

      • The final step is to name your rule. Give it a clear name you’ll understand/recognize later on; there are a lot of cryptic entries in the Firewall system created automatically by Windows and in response to certain applications; you want your entry to have a clean and easy to understand name you can find later. We named ours, simply, “Maxathon Block” to indicate which application we’re blocking. If you wish you can add a description (perhaps a reminder of why you created the block in the first place, lest you forget years down the road). When you’ve filled the appropriate information in, click “Finish”.


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