I’ve been using letsencrypt-auto forever and a day on my Ubuntu box at home. Ubuntu 16 lts. For the past year, at least. Port 80 is blocked and has been blocked forever and a day too, but I “was” able to Let’s Encrypt to get a certificate. It worked flawlessly. Now I can no longer get a certificate …

Letsencrypt-auto not working any more

mnordhoff December 19, 2018, 2:14am 3

Also, some ACME clients support the new port 443 challenge type, TLS-ALPN-01, but Certbot doesn't.

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