Unit iptables.service could not be found

Centos7 has replaced iptables, systemctl replaces Service with FireWallD.

First check your own virtual machine version is 6 or 7

I started to put the CentOS6 command to 7 on 7, and the following error occurred.

View the firewall status

Redirecting to /bin/systemctl status iptables.service
Unit iptables.service could not be found.

In fact, CentOS7's command has been updated.

1, check the firewall status

systemctl status firewalld.service

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If you have a green label "Active (Running)", the firewall is turned on.

2. Open firewall

systemctl start firewalld.service

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3. Turn off the firewall

systemctl stop firewalld.service

And check the firewall status

systemctl status firewalld.service

[ , , (img-aiWnNADb-1642944315806)(../../source/images/Unit%20iptables.service%20could%20not%20be%20found/image-20220123212401591.png)]

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