How to install Firewalld on CentOS
In this tutorial, we will explain How to install Firewalld on CentOS.
firewalld is a firewall management tool for Linux operating systems. It provides firewall features by acting as a front-end for the Linux kernel’s Netfilter framework via the iptables command, acting as an alternative to the iptables service. The name firewalld adheres to the Unix convention of naming system daemons by appending the letter “d”.
- VPS running CentOS
Step 1 – Install Firewalld
Firewall is needed for most software. To install it run the following command:
yum install firewalld
To start it run this command:
systemctl start firewalld
To enable it, run:
systemctl enable firewalld
To check the status of firewalld service:
systemctl status firewalld
Step 2 – Add service
You need to add services to firewalld if you want to access any service.
firewall-cmd --add-service=http --permanent
In that command, you need to put the service name that you want to add, for example, http.
To remove any service use this command:
firewall-cmd --remove-service=http --permanent
To check all service in your server run this command:
Step 3 – Add Ports
By using this command you can open any port in firewalld:
firewall-cmd --add-port=8080/tcp --permanent
To remove any port, use this command:
firewall-cmd --remove-port=8080/tcp --permanent
You can change /tcp with /udp based on your needs.
Step 4 – Use Firewall
To configure Firewalld, you need to use this command:
Using this command you can see all ports, services, sources, interfaces, etc.
You have successfully installed firewalld on CentOS.