A Free Firewall is a security application that helps protect your computer and your data from malicious software (malware) and hackers. It works by monitoring and controlling incoming and outgoing network traffic based on security rules that you create. It can be used to block access to certain sites, prevent unauthorized access to your system, and detect and block malicious programs from accessing your system. Free firewalls are typically installed on your computer or server and run in the background so that you can go about your normal activities without worrying about security threats. They can also be used to monitor the activity of applications and services on your network so that you can detect and block malicious traffic.
GlassWire
Comodo Free Firewall
simplewall
Windows Firewall Control
TinyWall
ZoneAlarm Free Firewall
Windows 10 Firewall Control
CacheGuard-OS
AppNetworkCounter
La versión gratuita de GlassWire no es un firewall. Es sólo un monitor de tráfico.