CentOS 7 FirewalID, Iptables

By default CentOS 7 use FirewalID. If you want to get rid of it and use iptables, you should do the following:

systemctl disable firewalld
 

systemctl stop firewalld

yum install iptables-services

systemctl start iptables
 

systemctl enable iptables
 

If you have saved rules you want to restore, type:

iptables-restore < /fullpath/your-saved-rules

Now save it to keep these rules after reboot:

service iptables save