How To Install Fail2ban on Ubuntu 20.04 LTS

In this tutorial, we will show you how to install Fail2ban on Ubuntu 20.04 LTS. For those of you who didn’t know, Fail2Ban is a utility that is used to detect and prevent brute force intrusion. By scanning logs for certain actions, such as repeated failed login attempts, Fail2Ban is able to alter firewall configurations to halt further events.

This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you through the step by step installation Fail2ban on an Ubuntu 20.04 Focal Fossa server. You can follow the same instructions for Ubuntu 18.04, 16.04, and any other Debian based distribution like Linux Mint.

Install Fail2ban on Ubuntu 20.04 LTS Focal Fossa

Step 1. First, make sure that all your system packages are up-to-date by running these following apt commands in the terminal.

Step 2. Installing Fail2ban on Ubuntu 20.04.

Run the following command to install Fail2ban:

Once done, the Fail2ban service will start automatically. You can verify Fail2ban using following command:

Step 3. Fail2ban Configuration.

The default Fail2ban installation comes with two configuration files, /etc/fail2ban/jail.conf and /etc/fail2ban/jail.d/defaults-debian.conf You can read more about jails here. To start configuring the Fail2ban server open, the jail.local file with nano editor :

Restart the Fail2ban service for changes to take effect:

Congratulations! You have successfully installed Fail2Ban. Thanks for using this tutorial for installing Fail2Ban on Linux Ubuntu system. For additional help or useful information, we recommend you to check the official Fail2Ban website.

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