Portmaster is described as 'Free and open-source tool that monitors all network activity, blocks unwanted connections, uses filter lists for ads and malware, enforces DNS-over-TLS, and sets custom app rules' and is a very popular Firewall in the security & privacy category. There are more than 25 alternatives to Portmaster for a variety of platforms, including Windows, Linux, Android, Mac and iPhone apps. The best Portmaster alternative is NextDNS, which is both free and Open Source. Other great apps like Portmaster are AdGuard, Pi-hole, simplewall and RethinkDNS.
NetworkTuna helps you detect and investigate suspicious network activity around your Windows PC. It looks for port scans and repeated attempts from nearby devices to reach services on your computer. Optional router monitoring checks for changes to your router's management...
Czechia
EU
Harbor Privacy is a managed DNS filtering service that blocks ads, trackers, and malicious domains network-wide, with no logging of browsing activity. Includes Harbor Kids, a family protection layer that filters adult content, gaming, dating apps, gambling, and dangerous sites...
Experimental Rust/Aya XDP + TC firewall and traffic analyzer. Low-overhead packet filtering with release evidence still pending for production claims.
PortExpert gives you a detailed vision of your personnal computer cybersecurity. It automatically monitors all applications connected to the Internet and give you all the information you might need to identify potential threats to your system.
FranceEU
