![15 Free Open-source Linux Firewall](/content/images/size/w600/2024/08/Child-in-Firefighter-Costume.jpg)
Linux
15 Free Open-source Linux Firewall
A firewall is a security tool that monitors and controls incoming and outgoing network traffic based on predetermined security rules. It acts as a barrier between a trusted internal network and untrusted external networks, such as the internet. Firewalls are essential for protecting systems from unauthorized access, cyber threats, and