How to protect your website's images from an external website?
1. Log into your cPanel account.
2. In the "Security" section, click on "HotLink Protection" Icon.
3. If it displays "Hotlink protection is currently disabled", click on the "Enable" button.
How to Configure Hotlink Protection?
Under "URLs to allow access:" you can allow an external website or your own website to have access. For example, if you have a subdomain like demo.example.com, you can add this website's url to the list of allowed websites.