TecAdmin published a tutorial about installing and configuring Fail2ban on Ubuntu 20.04.

How to Install and Configure Fail2ban on Ubuntu 20.04

Fail2ban is an tool used to improve server security from cyber attacks. It allows you to block remote ip addresses temporary or permanently based on defined settings. It helps you to secure your server and data from attackers. This tutorial help you to install Fail2ban on a Ubuntu 20.04 LTS Linux systems. 

How to Install and Configure Fail2ban on Ubuntu 20.04 – TecAdmin