Does anyone got request from "Host: acme.frontend" from letsencrypt?

One of my users, got such request from Letsencrypt:

GET /.well-known/acme-challenge/-HvFFScum7ClEJgg4jjmC38aUrLCxF9UGXh7Gchkj-k HTTP/1.0

Host: acme.frontend

Connection: close

User-Agent: Mozilla/5.0 (compatible; Let's Encrypt validation server; +

Accept: */*

Accept-Encoding: gzip

The host is Host: acme.frontend.

Does any one know where this request was coming from ?


This turns out to be a Docker thing, can you close the Let’s Encrypt thread so that people don’t spend time trying to diagnose it here ?

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