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How to install and configure Fail2Ban on your Ubuntu server

In this tutorial we will show you how to install and configure Fail2Ban on your Ubuntu VPS.

WHAT IS FAIL2BAN
Fail2Ban is the most famous application that can prevents dictionary attacks on your server.

??? You may ask how it is work?
Well, when Fail2Ban detects multiple failed login/attempts from the same IP address on your server, it creates temporary firewall rules that block traffic from that IP address.

Attempted logins can be monitored using many different ways, including SSH, HTTP, SMTP etc??? By default, Fail2Ban monitors SSH only.

HOW TO INSTALL FAIL2BAN?
To install Fail2Ban First, you will need to log in to your VPS as ROOT via SSH. Once you are in the first thing you need to do is to downloads the package lists from the repositories and ???update??? them to get information on the newest versions of packages and their dependencies. It will do this for all repositories and PPAs. To do that just type: