CentOS 7 - How to open ports in firewalld?

Prior to CentOS 7, “iptables” and “shorewall” were the two options avaiable. Since CentOS-7, the default firewall tool is “firewalld”. Here is a short-guide on how to open two ports in the firewalld application: firewall-cmd --get-active-zones # Lets open Jetty Web Server port firewall-cmd --zone=public --add-port=8080/tcp --permanent # Lets open some other port 4242 for TCP firewall-cmd --zone=public --add-port=4242/tcp --permanent # Commit changes firewall-cmd --reload firewall-cmd --list-all Cheers.