How To Install FirewallD on CentOS Stream 9

To install FirewallD on CentOS Stream 9, follow the steps below.

Step 1 : Ensure your system is up-to-date by running the following command:

Step 2 : If FirewallD is not already installed, you can install it using the following command:

Step 3 : Start the FirewallD service with the following command:

Step 4 : Enable FirewallD to start at boot:

Step 5 : Verify the status of FirewallD with:

Step 6 : Basic FirewallD Configuration

To allow traffic on port 80 (HTTP), use the following commands:

Congratulations! You have successfully installed and configured FirewallD on CentOS Stream 9.