How To Install FirewallD on AlmaLinux 9

To install and configure FirewallD on AlmaLinux 9, follow these steps:

Step 1 : Before installing any package, update your system using:

sudo dnf update -y

Step 2 : If FirewallD is not installed, install it using:

sudo dnf install firewalld -y

- Once installed, start the FirewallD service:

sudo systemctl start firewalld

- To ensure FirewallD starts on system boot, enable it:

sudo systemctl enable firewalld

Step 3 : Verify that FirewallD is running:

sudo systemctl status firewalld

Step 4 : You can configure FirewallD to allow traffic on specific ports, such as ports 80 (HTTP) and 443 (HTTPS). To allow traffic on these ports, run the following commands:

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

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