How Can I Only Access My Panel Via My Static IP Adress?

I would like to block other ip adress to enter my centos panel.. How can I do this on Centos panel, I couldn't find it on Firewall.. Can someone aid me about this?

Logout from admin panel and run the below command. Replace xxx.xxx.xxx.xxx with your IP address.

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echo 'xxx.xxx.xxx.xxx' >> /usr/local/cwp/.conf/.access_root