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 to get this to work?
Thanks
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 TLS-ALPN validation is your only option, you would have to look into other ACME clients.
Please fill out the fields below so we can help you better. Note: you must provide your domain name to get help. Domain names for issued certificates are all made public in Certificate Transparency logs (e.g. https://crt.sh/?q=example.com), so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.
My domain is:
I ran this command:
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I can login to a root shell on my machine (yes or no, or I don’t know):
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