Fail2ban is a vital security tool that helps protect your server from brute-force attacks. In this guide, we will go through the steps to install and configure Fail2ban alongside Firewalld on Rocky Linux 8.4.

Step 1: Update Your System

Before starting the installation, make sure your system is up to date. Open your terminal and run:

sudo dnf update -y

Step 2: Install Fail2ban

To install Fail2ban, use the following command:

sudo dnf install fail2ban -y

Step 3: Start and Enable Fail2ban

Once the installation is complete, start the Fail2ban service and enable it to start at boot:

sudo systemctl start fail2ban

sudo systemctl enable fail2ban

Step 4: Configure Fail2ban

The default configuration file is located at /etc/fail2ban/jail.conf. It’s recommended to copy it to jail.local for custom configurations:

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

Edit the new file with your preferred text editor:

sudo nano /etc/fail2ban/jail.local

Step 5: Install and Configure Firewalld

Ensure that Firewalld is installed and running. If it’s not installed, you can do so with:

sudo dnf install firewalld -y

sudo systemctl start firewalld

sudo systemctl enable firewalld

Step 6: Allow Fail2ban in Firewalld

Add the necessary rules to allow Fail2ban through Firewalld:

sudo firewall-cmd --permanent --add-service=http

sudo firewall-cmd --permanent --add-service=https

sudo firewall-cmd --reload

Step 7: Verify Fail2ban Status

You can check the status of Fail2ban with the following command:

sudo fail2ban-client status

Conclusion

By following these steps, you have successfully installed and configured Fail2ban with Firewalld on Rocky Linux 8.4. This setup will help enhance your server's security by preventing brute-force attacks.

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