How do you request a let’s encrypt certificate for common subdomains that do not resolve to an actual website?
When I put the subdomains in the box " Domain names listed here" like so:
… request failed : Web-based validation failed : Failed to request certificate :
ftp.example.com challenge did not pass:
Invalid response from http://ftp.example.com/.well-known/acme-challenge/L8y8eGEETErS5s74RHH08RfdANe2ivxMNJGH71yQRoc: "
which makes sense, but how does one request a let’s encrypt in Virtualmin for these sub domains that are not used for a website?