Hi there I’ve received an email stating that letsencrypt will only be supporting TLS-ALPN-01. I have a web currently on SSL with certbot. How do I do I check whether my certbot is using TLS-ALPN-01 and if not how do make it? And if Certbot do not support TLS-ALPN-01, is there any other alternative…

Certbot doesn’t support TLS-ALPN validation. Recent versions of Certbot use HTTP validation instead of TLS-SNI validation. Certbot also supports DNS validation. Unless you’re completely unable to use port 80, it should be easy to upgrade Certbot and automatically use HTTP validation. If using TL…

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Action required: Let's Encrypt certificate renewals

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