How to replace firewalld with iptables in CentOS 7

With next commands you will disable firewalld, install iptables services and enable them for starting with system.

sudo systemctl stop firewalld
sudo systemctl disable firewalld
sudo yum -y install iptables-services
sudo systemctl start iptables
sudo systemctl start ip6tables
sudo systemctl enable iptables
sudo systemctl enable ip6tables