How to set up a Custom Host Header?
The domain that you will set in the Custom Host Header will instruct the Origin Shield server to replace the request host header value (e.g. domain) for every request proxied to the origin.
In other words, when the Origin Shield server contacts the origin’s IP address, it will use the new value in the request host header instead of the original one.
To set up Custom Header, navigate to ‘Multi CDN’ > ‘General Settings’ > ‘Custom Host Header’ box.
On the Custom Header box, click the ‘Settings’ (gear) icon, then write the Custom Host Header domain on the field.
Finally, click the ‘Save’ button.