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ZoneAlarm Free Firewall - Personal Firewall software
TinyWall - Lightweight and non-intrusive firewall
Comodo Firewall - Comodo Firewall Pro - Secure your system against internal attacks such as Trojan viruses /...
GlassWire - Visualize network activity in detail, get notified when new apps access the network, look out for...
Radio Silence - Radio Silence is a network monitor and firewall for the macOS. The software stops apps from making network connections. The firewall runs in the background and does not require an open window.
Windows Firewall Control - Windows Firewall Control is not the built in firewall system in the Windows operating systems.