Using firewalld in Linux

Firewalld is an open source firewall management tool that acts as a front-end tool for the Linux kernel's netfilter framework. It is a zone-based firewall system that allows for the different security configuration levels for different connection zones.

While Ubuntu and Debian rely on ufw for the firewall function, firewalld is shipped by default in Fedora, CentOS, openSUSE and Red Hat.

This here is a collection of quick tutorials that teaches you various ways of using the firewalld firewall system.

You'll learn various usage of the firewall-cmd command, along with tips on configuring firewalld as per your requirements.

The collection will be updated continually with more tutorials in the future.