Unable to renew or create certificate via Synology NAS

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My domain is: jnrfalcon.studio

I ran this command: syno-letsencrypt new-cert -d jnrfalcon.studio -m myemail@gmail.com -v

It produced this output:

DEBUG: Dns01 challenge: Teardown [{“code”:“badparam”,“errinfo”:“delete.go:27”}].
DEBUG: DNS challenge failed, reason: {“error”:102,“file”:“client.cpp”,“msg”:“no valid domain name”}

DEBUG: Normal challenge failed, reason: {“error”:107,“file”:“client.cpp”,“msg”:“jnrfalcon.studio: Fetching https://jnrfalcon.studio/.well-known/acme-challenge/{hiden}: Timeout during connect (likely firewall problem)”}

DEBUG: failed to open port 80.
DEBUG: close port 80.
{“error”:101,“file”:“client.cpp”,“msg”:“failed to open port 80.”}

I own this domain and just rechecked that it is still current. Port 80 and 443 are both open and directed to the NAS. So no reason that the domain is not valid or the the port is not open. I also run the same for synology subdomain, works fine. So my guess is there’s some problem with Let’s Encrypt’s service that is discriminating *.studio. (Note: you’ll find the current cert is my synology subdomain because it automatically defaulted back to it when I deleted the unrenewable entry)

Please fix.

Hi @jnrfalcon

there is a check of your domain, there is a critical problem visible - https://check-your-website.server-daten.de/?q=jnrfalcon.studio

There are ipv4- and ipv6-addresses:

Host T IP-Address is auth. ∑ Queries ∑ Timeout
jnrfalcon.studio A yes 1 0
AAAA 2600:6c54:7c00:2d2a:1691:82ff:fe6e:747e yes
www.jnrfalcon.studio Name Error yes 1 0

But ipv6 doesn’t answer, not port 80, not port 443:

Domainname Http-Status redirect Sec. G
http://jnrfalcon.studio/ 301 https://jnrfalcon.studio/ 1.056 A
2600:6c54:7c00:2d2a:1691:82ff:fe6e:747e -14 10.030 T
Timeout - The operation has timed out
https://jnrfalcon.studio/ 302 https://jnrfalcon.studio/en/ 5.060 N
Certificate error: RemoteCertificateNameMismatch
2600:6c54:7c00:2d2a:1691:82ff:fe6e:747e -14 10.026 T
Timeout - The operation has timed out
https://jnrfalcon.studio/en/ -14 10.026 T
Timeout - The operation has timed out
http://jnrfalcon.studio/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de 301 https://jnrfalcon.studio/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de 0.814 A
Visible Content: 301 Moved Permanently nginx
2600:6c54:7c00:2d2a:1691:82ff:fe6e:747e -14 10.026 T
Timeout - The operation has timed out
Visible Content:
https://jnrfalcon.studio/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de -14 10.026 T
Timeout - The operation has timed out
Visible Content:

That’s a critical error because Letsencrypt prefers ipv6.


  • remove your ipv6 address, create a certificate, then fix your ipv6 (or)
  • fix your ipv6 directly.

You can use the online tool to check your ipv6 direct - https://check-your-website.server-daten.de/?q=2600%3A6c54%3A7c00%3A2d2a%3A1691%3A82ff%3Afe6e%3A747e

PS: That’s

wrong. studio is a top level domain, so you can create a certificate.

Fixed by deleting AAAA record. Thanks!

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