support create-a-zone-referrer 
KeyCDN
JUNE 18, 2020
The feature Block Referrer is now available! Previously, only referrer whitelisting was available, which required all necessary domains related to the Zone to be added. Block Referrer explained Blocking referrers ensures that content is only loaded from authorized domains. Create a Zone Referrer.
All Things Distributed
FEBRUARY 17, 2011
I have used a bucket policy to make all documents world readable, but you could create one that restricts it to referrers, network address range, time of day, etc. New AWS feature: Run your website from Amazon S3. By Werner Vogels on 17 February 2011 07:45 AM. Comments (). returns the index.html at the bucket level and [link].
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