Failed to connect to Let’s Encrypt. Please make sure your Diskstation and Router have Port 80…

I recently was annoyed by a strange error.

“Failed to connect to Let’s Encrypt. Please make sure your Diskstation and router have port 80 open to Let’s Encrypt domain validation from the Internet. All other communications with Let’s Encrypt go over HTTPS to keep your Diskstation secure.”

Synology Lets Encrypt Issue

Is was searching for port forwarding issues on port 80 and 443. But seems all correct and working. Must be something else. Finally found the root cause.

The website was reachable using www sub- domain prefix but not without. ¬†Using mathiasirmer.com there was a not working redirection. As soon as I fixed this I was able to get the certificate from Lets Encrypt. So don’t let this error message guide you in the wrong way.

Do you see this issue and need help? Leave me a comment!

 

7 thoughts on “Failed to connect to Let’s Encrypt. Please make sure your Diskstation and Router have Port 80…

  1. I’m getting the same message, but I don’t have the same problem…I don’t think. I have a http://www.mydomain.com hosted by Blogger, so I can’t do a redirect. I’m trying to use a subdomain.mydomain.com for the Synology but am getting the same error.

    My issue is that you can’t use an ASUS RT-68U to host Port 80 websites. It is an issue with the stock and Merlin firmware. There’s no way to fix it other than to swap routers out. That’s my next plan.

    Just wanted to leave a comment here so others might find it.

  2. Hi Mathias,

    I am getting the exact same error message when trying to renew my Let’s Encrypt certificate. Can you please explain what you did to resolve this issue? I don’t get what you mean by www redirect.

    Thank you!

  3. I’m having the same issue. What did you have to do?

  4. This was my issue. Thank you!!

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