[root@centos7 /]# systemctl status firewalld.service
● firewalld.service - firewalld - dynamic firewall daemon
   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: enabled)
   Active: active (running) since Fri 2017-07-28 11:10:59 CEST; 42min ago
     Docs: man:firewalld(1)
 Main PID: 616 (firewalld)
   CGroup: /system.slice/firewalld.service
           └─616 /usr/bin/python -Es /usr/sbin/firewalld --nofork --nopid

Jul 28 11:10:52 centos7.fenestros.loc systemd[1]: Starting firewalld - dynamic firewall daemon...
Jul 28 11:10:59 centos7.fenestros.loc systemd[1]: Started firewalld - dynamic firewall daemon.
[root@centos7 /]# systemctl stop firewalld.service
[root@centos7 /]# systemctl disable firewalld.service
Removed symlink /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.
Removed symlink /etc/systemd/system/basic.target.wants/firewalld.service.
[root@centos7 /]# systemctl status firewalld.service
● firewalld.service - firewalld - dynamic firewall daemon
   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)
   Active: inactive (dead)
     Docs: man:firewalld(1)

Jul 28 11:10:52 centos7.fenestros.loc systemd[1]: Starting firewalld - dynamic firewall daemon...
Jul 28 11:10:59 centos7.fenestros.loc systemd[1]: Started firewalld - dynamic firewall daemon.
Jul 28 11:54:00 centos7.fenestros.loc systemd[1]: Stopping firewalld - dynamic firewall daemon...
Jul 28 11:54:00 centos7.fenestros.loc systemd[1]: Stopped firewalld - dynamic firewall daemon.