How to setup firewall in Linux? - Iptables Tutorial

Hi, firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules. Linux firewall can be implemented using several tools such as iptables, UFW (Uncomplicated Firewall), firewalld, etc. In this tutorial, we will be focusing on iptables, which is the most commonly used firewall tool in Linux.

Step 1: Install iptables

In most Linux distributions, iptables is pre-installed by default. However, if it is not installed, you can install it using the following command:

sudo apt-get install iptables

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