Blocked devices

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In the Internet Security App I go to Computer> Settings> Enhanced Firewall & I see at the bottom Blocked devices and I want to block a device from accessing my Network but I can't figure out how to do it. When I click on that tab I don't get redirected. I also tried to enter the the Smart Mode + Notification feature but that doesn't do it and I went into Firewall Rules but that only blocks Apps. So what's the path?

Hello Henry,
Thank you for reaching AVG Community Support Forum.
We will certainly help you with the issue. We've sent you an email to your registered email address. Please check for the email and revert to us.
Thank you for your understanding.