My domain is: ha.efstathiou.me
I get this output:
starting version 3.2.4 Saving debug log to /var/log/letsencrypt/letsencrypt.log Plugins selected: Authenticator standalone, Installer None Obtaining a new certificate Performing the following challenges: http-01 challenge for ha.efstathiou.me Waiting for verification... Cleaning up challenges Failed authorization procedure. ha.efstathiou.me (http-01): urn:acme:error:unknownHost :: The server could not resolve a domain name :: No valid IP addresses found for ha.efstathiou.me IMPORTANT NOTES: - The following errors were reported by the server: Domain: ha.efstathiou.me Type: unknownHost Detail: No valid IP addresses found for ha.efstathiou.me To fix these errors, please make sure that your domain name was entered correctly and the DNS A/AAAA record(s) for that domain contain(s) the right IP address.
… which is funny because the domain resolves correctly to my server’s IP and I have checked a bunch of DNS servers. What am I doing wrong?