this post was submitted on 10 Mar 2024
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Local DNS-01 wildcard certificate not renewed? (lemmy.dbzer0.com)
submitted 8 months ago by dataprolet@lemmy.dbzer0.com to c/selfhosted@lemmy.world
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I followed this tutorial to create local certificates for my home server, but now it failed to renew automatically and I have no clue waht to do. Can anybody assist me in debugging, please? https://notthebe.ee/blog/easy-ssl-in-homelab-dns01/

I'm using duckdns.org, added mydomain.duckdns.org and the local IP of my home server. In Nginx-Proxy-Manager I have created the respective wildcard certificate. The log of my NPM container reports the following:

[3/10/2024] [1:55:50 PM] [SSL      ] › ℹ  info      Renewing Let'sEncrypt certificates via DuckDNS for Cert #6: *.mydomain.duckdns.org, mydomain.duckdns.org
[3/10/2024] [1:55:50 PM] [SSL      ] › ℹ  info      Command: certbot renew --force-renewal --config "/etc/letsencrypt.ini" --work-dir "/tmp/letsencrypt-lib" --logs-dir "/tmp/letsencrypt-log" --cert-name "npm-6" --disable-hook-validation --no-random-sleep-on-renew 
[3/10/2024] [1:55:50 PM] [Global   ] › ⬤  debug     CMD: certbot renew --force-renewal --config "/etc/letsencrypt.ini" --work-dir "/tmp/letsencrypt-lib" --logs-dir "/tmp/letsencrypt-log" --cert-name "npm-6" --disable-hook-validation --no-random-sleep-on-renew 
[3/10/2024] [1:55:53 PM] [Express  ] › ⚠  warning   Saving debug log to /tmp/letsencrypt-log/letsencrypt.log
Failed to renew certificate npm-6 with error: The DNS response does not contain an answer to the question: mydomain.duckdns.org. IN TXT
All renewals failed. The following certificates could not be renewed:
  /etc/letsencrypt/live/npm-6/fullchain.pem (failure)
1 renew failure(s), 0 parse failure(s)
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[–] TechAdmin@lemmy.world 1 points 8 months ago

I had issues with DNS checks and traced it to my pihole. I changed that container's resolv.conf to use cloudflare DNS and it has been working fine since. It was with Caddy so needed to change over to use IPs.

[–] catloaf@lemm.ee 0 points 8 months ago (1 children)

Have you looked at the debug log? Or even what you pasted? It tells you what it's missing (though this part doesn't go into the whys).

[–] dataprolet@lemmy.dbzer0.com 3 points 8 months ago (1 children)

Of course, but I don't know what it means or what to do with it otherwise I obviously wouldn't have create this post!?

[–] catloaf@lemm.ee 0 points 8 months ago (1 children)

Does the debug log not have more info?

[–] dataprolet@lemmy.dbzer0.com 2 points 8 months ago (1 children)

Here's the full log from /tmp/letsencrypt-log/letsencrypt.log. https://notebin.de/?4859b67f1b29f0e2#8G6vSon5PUGUHoZvMYD3zKwx8hkJeCV9xQM4TWFSvudM

[–] catloaf@lemm.ee 2 points 8 months ago (1 children)

Did you replace your domain with mydomain.duckdns.org in the logs, or did you just not configure the client with your domain? I'm not sure how it would have ever worked if that was the case, though. Either way, it tells you the DNS challenge record is missing.

[–] dataprolet@lemmy.dbzer0.com 1 points 8 months ago

I replaced my actual domain with "mydomain".