If you wish to ban a user from accessing your website in any way, the best way to do this is to block their IP address.
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- Login to cPanel.
 - Locate and click on the “IP Deny Manager” icon located in the “Security” category.
 
 

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- Enter the IP address or IP address range that you wish to block.
 
 

- Click “Add” and the IP address will now be blocked.