Go to your Cloudfront distribution in AWS console. Open Origins tab and click Create origin
Set Origin domain: ingress.rebelboost.com
And add a custom header X-Forwarded-Host: <yourdomain.com>
Leave default values in other fields and click Create origin.
Open Behaviors tab and click Create behavior
Specify a path that you want to pass to Rebelboost and associate with the new origin
Change Cache policy to CachingOptimized and Origin request policy to AllViewerExceptHostHeader
Click Create behaviour and wait for the new config to be deployed. You can check the status on General tab
Once it's deployed, the setup is done