firewalld
is running, enter the following command:
~]$ systemctl status firewalld
firewalld.service - firewalld - dynamic firewall daemon
Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled)
Active: active (running) since Sat 2013-04-06 22:56:59 CEST; 2 days ago
Main PID: 688 (firewalld)
CGroup: name=systemd:/system/firewalld.service
~]$ firewall-cmd --state
running