Centos / Redhat 7 Switching back to iptables

It may be frustrating to learn yet another firewall (firewalld) in Centos or RHEL 7 . Here is how  you can switch back to the favorite IPTABLES.

Stop firewalld and disable it to start at boot time :

systemctl stop firewalld
systemctl disable firewalld

Now Initiate and enable Iptables (IP V4 ) and ip6tables ( IPV6):

yum install iptables-service

touch /etc/sysconfig/iptables
systemctl start iptables
systemctl enable iptables

touch /etc/sysconfig/ip6tables
systemctl start ip6tables
systemctl enable ip6tables