On Wed, Jan 17, 2018 at 10:30 AM, Stefan Eissing <[email protected]> wrote: > >> Am 16.01.2018 um 21:26 schrieb William A Rowe Jr <[email protected]>: >> >> Color me very confused, but I can't distinguish a difference between vhost >> based >> Host: header selection in the "http-01" case, and SNI identification >> in the case of >> "tls-sni-01". Am I missing something? Discussion pointers? > > "http-01" makes a request against the dns name to be validated. It is > usually not (easily) possible to intercept that from the wrong user account. > > "tls-sni-0[12]" just opens a TLS connection with SNI <challenge>.acme.invalid > Some shared hosters have allowed people to upload a certificate for that. So, > you sign up via ACME (from anywhere) for a shared hosted not-my-domain.com > where you are also customer. Wait for the challenge token, create the cert and > upload it to the hoster.
I think what is missing is simply "https-01", just like "http-01" but on TLS and a self signed cert (SNI is irrelevant). It don't see how it's less (nor more) secure than "http-01", but admins that don't want to or can't use port 80 have their way...
