Question

Sub domain Lets-Encrypt challenge failed

Hi. Brand new to DO. I just installed NextCloud in my first droplet using a self signed SSL cert on the server IP address. All works as expected. :)

Now, I have added a sub domain on my (external to DO) web hosting company (VentraIP) and set the A record there to point to the DO IP address. It works fine, resolving to the DO Nextcloud server instance as above.

So… now I want to use Lets-Encrypt to make it secure. When I follow the instructions to setup the SSL

sudo nextcloud.enable-https lets-encrypt

I get the error:

Domain: cloud.mydomain.com.au Type: unauthorized Detail: During secondary validation: Invalid response from http://cloud.mydomain.com.au/.well-known/acme-challenge/8jH3_HtiUcMwEn1yJ9nQQ21TON6tApEBmw-44h3unas

(where cloud.mydomain.com.au == my real subdomain name)

The subdomain is listed in the Trusted Domains.
The firewall port is openned.

What have I missed, do you think? Thanks, Murray


Submit an answer

This textbox defaults to using Markdown to format your answer.

You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!

Sign In or Sign Up to Answer

These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.

Accepted Answer

Hi there,

Right after the Invalid response from line, do you get any other output? Usually, right after that line, there should be a more detailed message with the exact response and reason why Let’s Encrypt is failing to validate the domain name.

In most cases, it is due to the A record of the domain not matching the server IP address.

Regards, Bobby

Want to learn more? Join the DigitalOcean Community!

Join our DigitalOcean community of over a million developers for free! Get help and share knowledge in Q&A, subscribe to topics of interest, and get courses and tools that will help you grow as a developer and scale your project or business.