<ul><li>Firewalls are crucial for securing systems by controlling incoming and outgoing network traffic.</li><li>Linux users can choose between ufw (Uncomplicated Firewall) and firewalld for firewall management.</li><li>Setting up a firewall with ufw involves enabling it, allowing essential services, denying unwanted traffic, and setting default policies.</li><li>Setting up a firewall with firewalld includes enabling it, allowing services and custom ports, and reloading rules.</li></ul>

Simple Firewall with ufw or firewalld

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