Oprire si mascare serviciu firewalld:
systemctl stop firewalld systemctl mask firewalld
Instalare pachet iptables-services:
yum install iptables-services
Activare serviciu iptables la pornirea sistemului:
systemctl enable iptables
Managementul serviciului:
systemctl [stop|start|restart] iptables
Salvarea regulilor de firewall:
service iptables save