/etc/init.d/iptables close

[root@dataapp02 tmp]# service iptables stop
Redirecting to /bin/systemctl stop  iptables.service
Failed to stop iptables.service: Unit iptables.service not loaded.

[root@dataapp02 tmp]# service firewalld stop
Redirecting to /bin/systemctl stop  firewalld.service

http://mirror.centos.org/centos/7/os/x86_64/repodata/repomd.xml