Is there any way to ask cloudflare talking to origin with ESNI?

if possible,
where is the document that explains how to config origin nginx and cloudflare settings?

This is not currently possible for a couple of reasons:

  1. I don’t believe nginx supports ESNI - the spec itself for ESNI is still in draft ( ) so I don’t think you would be able to get an origin with nginx & ESNI support
  2. We don’t yet support making a request using ESNI to the origin - I’m not aware of any plans to do so yet but @akrivit might know more

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