Free, open-source privacy suite monitoring all network activity, blocking unwanted connections, using trusted filter lists for ads and malware, enforcing DNS-over-TLS, providing custom app and global rules, and supporting advanced privacy management.




Portmaster is the most popular Windows & Linux alternative to Minimal Firewall.
Portmaster is the most popular Open Source & free alternative to Minimal Firewall.
- Portmaster is Freemium and Open Source

























































