TecAdmin published a tutorial about installing and configuring Fail2ban on Debian 10.

How to Install and Configure Fail2ban on Debian 10

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 decribed you the steps to install Fail2ban on a Debian 10 Buster Linux systems. 

How to Install and Configure Fail2ban on Debian 10 – TecAdmin