Hi! I am struggling with certbot and am in need of help. Log is attached to this post. My domain is: audiobook.squish.ie I ran this command: Nginx Proxy Manager - Renew cert Tried deleting cert and requesting a new one I run a dockerized NginxProxyManager on top of unraid. Am fairly familia…

[image] mark-cassidy: Where in the world are the LetsEncrypt servers? We don’t know. You will have to assume they’re located anywhere in the world. If you want to lock down port 80, another option is to use the DNS-01 challenge instead of HTTP-01.

AFAICT, 212.159.75.183:80 does not seem to be globally reachable. I tried connecting from three different networks in two different countries. It worked from one network (in Sweden) but not from the other two (also in Europe). You might want to check your firewall to see why it blocks some requests…

Ah! Yes I was getting millions of attempted connections from China, USA and other countries in Europe so locked it down to countries I travel to most. Where in the world are the LetsEncrypt servers? Great catch! Thanks so much!

right ok that makes sense too :slight_smile: I will try now

That appears to have done the trick! Thanks so much for your help!

Certificates Failing to renew but Nginx accessible

Help

petercooperjr October 1, 2025, 2:21pm 7

You may want to read through this, which describes how and why Let's Encrypt validates from multiple locations around the world.

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Certificates Failing to renew but Nginx accessible

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