In this tutorial we will show you how to install and enable an iptables firewall on CentOS 7 Linux.
First, need to disable and remove firewalld firewall. Type Following commands:
sudo systemctl stop firewalld.service sudo systemctl disable firewalld.service yum remove firewalld -y
Install iptables firewall on CentOS 7
To install Iptables package type following command:
yum install iptables-service -y
After install iptables firewall, set the iptables service to start automatically with system booting up:
systemctl enable iptables
if you want to use command “/etc/init.d/iptables save” to save the firewall policy , you need to update the iptables init script. issue the following command:
cp /usr/libexec/iptables/iptables.init /etc/init.d/iptables
now you can use “/etc/init.d/iptables save ” command.
/etc/init.d/iptables save
That’s been all!