How to enable and disable the firewall on CentOS 7

In CentOS 7, you can enable or disable the firewall using the following commands:

1. Turn on the firewall.

sudo systemctl start firewalld

1. Turn off the firewall.

sudo systemctl stop firewalld

To permanently enable or disable the firewall, you can use the following commands:

1. Permanently activate the firewall.

sudo systemctl enable firewalld

1. Permanently disable the firewall.

sudo systemctl disable firewalld

Remember, after turning the firewall on or off, you need to restart the firewall service for the changes to take effect.

sudo systemctl restart firewalld

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