How to Install Fail2ban on Linux

Fail2ban is a popular intrusion prevention tool for Linux systems. It helps to protect against brute-force attacks by monitoring log files and blocking IP addresses that exhibit malicious behavior. Here are the steps to install and configure Fail2ban on a Linux system:

Step 1: Install Fail2ban

sudo apt-get update
sudo apt-get install fail2ban

Step 2: Configure Fail2ban

sudo cp /etc/fail2ban/jail.conf /etc/fail2ban/jail.local
sudo nano /etc/fail2ban/jail.local

In the jail.local file, you can configure various parameters such as the log file to monitor, the banned IP address time, etc. Save and close the file after making the necessary changes.

Step 3: Start and Enable Fail2ban Service

sudo systemctl start fail2ban
sudo systemctl enable fail2ban

Step 4: Check the Status of Fail2ban

sudo fail2ban-client status

You should see the status of all the enabled Fail2ban jails, and the number of banned IP addresses if any.

That's it! You have successfully installed and configured Fail2ban on your Linux system. It will now help to prevent malicious attacks and keep your system secure.