This article covers how to install Fail2ban and protect SSH from illegitimate attempts. For webmasters or anyone managing Linux server that is accessible over the Internet, the risks of the server being compromised is high, so implementing best security practices to help mitigate these attacks should be a priority. In fact, Fail2ban is a tool that help protect Linux servers from brute force and other automated attacks by monitoring the services logs for malicious activity. It uses regular expressions to scan the server's logs for malicious attempts and bans offending IPs for a specific length of time using the system's firewall.
How to Install Fail2ban on any Linux system ?
Fail2ban packages are automatically included in Ubuntu repositories. To install it, simply run the commands below:
$ sudo apt update
$ sudo apt install fail2ban
Once the installation is complete, the service should automatically start up and ready to be configured.
To check if the service is up and operational, run the commands below:
$ sudo systemctl status fail2ban