firewalld centos7 replaces iptables

Subject:

CentOS 7 is using FirewallD now!

Example:

firewall-cmd --zone=public --add-port=3000/tcp --permanent

reload rules:

firewall-cmd --reloadref: https://serverfault.com/questions/626521/centos-7-save-iptables-settings

2017-06-06 09:27:38gstlouis