If you need to disable firewalld and use iptables in server use the following steps. First, stop and mask the firewalld service: systemctl stop firewalld systemctl mask firewalld Next, install the iptables-services package and enable the service to start at boot: yum install iptables-services systemctl enable iptables Then, saving the firewall rules can be done … Continue reading Enable and install iptables in centos 7 →