Firewalld

Firewall is like a guard who stands at the gate of your house and checks who is coming in or out. Firewalld is a kind of guard but it is made up of a bunch of pieces of software that help to protect the things inside your computer or smartphone. Firewalld looks at the things that come in and out of your computer and if it notices anything unusual or dangerous, it will block it so that it can't get inside your computer. Firewall can keep people from getting access to your private information and can help to keep your computer safe.