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Firewalld

Firewalld is a firewall management tool for Linux systems. It provides zone-based network traffic filtering and configuration options that simplify the process of setting up and maintaining firewalls. Firewalld can dynamically manage rules to reflect changes in network environments without needing to restart services or make manual adjustments. This flexibility makes it easier for system administrators to secure their systems while making them accessible when needed. In a GUI-less environment, administrators use command-line tools such as firewall-cmd, firewall-config (a graphical user interface), or directly editing XML configuration files stored in /etc/firewalld/.

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