Portmaster is a free and open source firewall for Windows and of all the firewalls I've tested for Windows, it's the crème de la crème. This guide will show you how to set it up and use it.

Time stamp:

00:00 Network activity screen
02:02 App settings
02:43 Secure Data Protection Network (SPN)
04:20 Encrypted DNS
05:28 Problems loading the website (️IMPORTANT️)
06:38 DNS options
10:00 Filter lists
10:43 Problems loading the website (continued – filter list blocks)
11:24 Portmaster compared to other firewalls
12:35 Outro

DNS filter test article:

https://techblog.nexxwave.be/public-dns-malware-filters-tested/

Portmaster Firewall:

https://safing.io/
https://github.com/safing/portmaster

Background songs:

Floof – Jobii
Smithereens – Jobii
Laundry List – Dylan Sitts
Cold Leftovers – Dylan Sitts

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