Centos turns off the firewall 7 and before 7, and Unit iptables.service could not be found.

Today, when the firewall was turned off, Unit iptables.service could not be found. After inspection, it was found that it was caused by the centos version, so I made this document to record
Let’s talk about Centos7 first

Centos7 and later versions

First check the status of the firewall

firewall-cmd state

There is also a way of checking, judging the active result in the result

systemctl status firewalld.service

Then the method of turning off the firewall is also very simple, similar to the previous one

systemctl stop firewalld.service

Permanently closed is

systemctl disable firewalld.service

Previous versions of centos7

Later, I will talk about the traditional closing method before 7. Of course, 7 does not have this method. If necessary, you can choose yum to install. Personally, it is unnecessary. Since people have made changes, it must have his advantage
View firewall status

service iptables status

Turn off firewall

service iptables stop

Permanently turn off the firewall

chkconfig iptables off

There is no explanation when it is turned on. I believe that you can find a way by looking for a pattern.
If I hope to help you, please give me a thumbs up 🤨🤭🤭

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