yum search firewalld
yum install firewalld.noarch
firewall-cmd -h
firewall-cmd --zone=public --add-port=22/tcp
firewall-cmd --zone=public --add-port=22/tcp
firewall-cmd --list-ports
firewall-cmd --add-port=80/tcp
yum search firewalld
yum install firewalld.noarch
firewall-cmd -h
firewall-cmd --zone=public --add-port=22/tcp
firewall-cmd --zone=public --add-port=22/tcp
firewall-cmd --list-ports
firewall-cmd --add-port=80/tcp