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How to enable iptables on CentOS 7

Once you install CentOS 7, you will understand there are many differences between CentOS 6 and 7, but however, some technical and people want to use old programs like “iptables” on CentOS 7. One of the programs which are not common on CentOS 7 is “iptables”. CentOS 7 comes with another firewall installed in it called “firewalld” which is known by any customer.

You are able to disable this new firewall and enable old known iptables on CentOS 7 again.  Here I will show you how to do this.

We have to stop and disable firewalld service.

[root@test-lab ~]# systemctl stop firewalld
[root@test-lab ~]# systemctl mask firewalld

Then we should install iptables again on CentOS 7.

yum install -y iptables iptables-services

Once it is done, we have to enable and start it

systemctl enable iptables
systemctl start iptables

Now you are able to use old known iptables on CentOS 7 again, however, firewalld will give you more ability and better firewall options if you want to go professional.

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