How can I use the iptables on CentOS 7 or fedora?

http://stackoverflow.com/questions/24756240/how-can-i-use-iptables-on-centos-7

# sudo service iptables startRedirecting to /bin/systemctl start  iptables.serviceFailed to issuemethod call: Unit iptables.service failed to load: No such file or directory.

With RHEL 7/centos 7, FIREWALLD is introduced to manage iptables. IMHO, FIREWALLD is more suited for workstations than for server environments.

It's possible to go, and a more classic iptables setup. First, stop and mask the FIREWALLD service:

systemctl stop firewalldsystemctl mask firewalld

Then, install the Iptables-services package:

yum install iptables-services

Enable the service at Boot-time:

systemctl enable iptables

Managing the Service

systemctl [stop|start|restart] iptables

Saving your firewall rules can be done as follows:

service iptables save

Or

/usr/libexec/iptables/iptables.init save

How can I use the iptables on CentOS 7 or fedora?