1. List all services enabled/disabled on boot (ex chkconfig –list)
systemctl list-unit-files
2. Enable HTTPD + Mysql service on system boot:
systemctl enable httpd
systemctl enable mariadb
3. Reverting to iptables from firewalld
systemctl stop firewalld
systemctl mask firewalld
yum install iptables-services
systemctl enable iptables
systemctl start iptables
# to save iptables rules use
service iptables save
