Hi guys, I'm using letsencrypt certificates since several years but now the update aka renewal fails completely. The system is based on Ububtu 20.04 LTS and the apache webserver is the version 2.4.41. However, since some weeks this update process fails continously. I looks like the .well-known dir…

Ok, I disabled the main blocking rule and indeed port 80 was then reachable. Seems the blocking list are too mighty and maybe to general..... Thanks for openeing my eyes.

Update Letsencrypt certificate fails

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petercooperjr August 16, 2025, 3:37pm 10

It may help to read through this description of why and how Let's Encrypt checks for control of the domain from many places around the world:

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Update Letsencrypt certificate fails

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