My posts are usually notes and reference materials for myself, which I publish here with the hope that others might find them useful.
EDIT 23 May ...
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LetsEncrypt have revoked around 3 million certs last night due to a bug that they found. Are you impacted by this, Check out ?
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As of Oct 2020, Let's Encrypt still signs the EC cert you generate with a RSA intermediate. This works fine in all browsers but it is not HIPPA or NIST compliant. If you do this, you will fail tests that check for those things.
Thank you for this article. But one thing is missing: Automatic renewal.
Would be nice, if you could add it.