Synology - Cannot issue a certificate or

Please fill out the fields below so we can help you better. Note: you must provide your domain name to get help. Domain names for issued certificates are all made public in Certificate Transparency logs (e.g., so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.

My domain is:

I ran this command: Add a new certificate >> Get a certificate from lets encrypt >>

It produced this output:The operation failed. Please log into DSM and retry.

My web server is (include version):nginx

The operating system my web server runs on is (include version): Synology DSM 6.2

My hosting provider, if applicable, is: namecheap

I can login to a root shell on my machine (yes or no, or I don’t know): yes

I’m using a control panel to manage my site (no, or provide the name and version of the control panel):no

The version of my client is (e.g. output of certbot --version or certbot-auto --version if you’re using Certbot): NA

Have you updated to the latest firmware?

Yes, It is the latest firmware.

It is difficult to be certain, but the HTTP response on a simple challenge request test appears to require authentication.
If so, this will break the LE challenge.

curl -Iki
HTTP/1.1 403 Forbidden
Date: Sat, 16 May 2020 10:37:54 GMT
Content-Type: text/html
Content-Length: 11939
Connection: keep-alive
Keep-Alive: timeout=20
Vary: Accept-Encoding
ETag: "5aff6d93-2ea3"

Lets debug results show everything is okay?

Are you able to place a test-file in that challenge location?

Hi @nmittra


there is a

© 2018 Synology Inc.

Checking the table from “check your website” with the html content reduced, the newest checks: There are some

© 2019 Synology Inc.

So: Is your firmware really up to date? Doesn’t look so.

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