how to close a port on CentOS 7 server?

Question

I have opened the 3000 port of my CentOS 7 server with the following commands:
firewall-cmd --zone=public --add-port=3000/tcp --permanent
firewall-cmd --reload

But now I want to closing them, how can I do that?

Artem S. Tashkinov · Answer

firewall-cmd --zone=public --remove-port=3000/tcp --permanent
should do the trick.
man firewall-cmd is always at your disposal.

how to close a port on CentOS 7 server?

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