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[Solved] Auto renewal of let's encrypt certificate did not work


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Posted

Let's encrypt cannot reach that domain to verify it.

Settings are correct, DNS looks fine (resolves to our IP), no cloudflare so not a CF issue, and let's encrypt doesn't publish a list of IP addresses, so I can't check the firewall. Maybe Krydos has an idea?

Quote

Invalid response from https://acme-v02.api.letsencrypt.org/acme/authz-v3/431895316397.

Details:

Type: urn:ietf:params:acme:error:connection

Status: 400

Detail: 65.19.154.90: Fetching https://borbach.com/.well-known/acme-challenge/p1UQ73Dr1MXgJYotZDlSWDaTFVkMBXvUjT7Y02MtimU: Timeout during connect (likely firewall problem)

 

Posted

The problem is .well-known has to be accessible via http.

# curl "http://borbach.com/.well-known/acme-challenge/ysITPUa8hTIqNhE7FjrKF9WjF0QDi4AUgdjhK5ioL3U"
<html>
<head><title>301 Moved Permanently</title></head>
<body>
<center><h1>301 Moved Permanently</h1></center>
<hr><center>nginx</center>
</body>
</html>

As you can see requests for http get redirected to https so SSL verification will always fail. I disabled redirection to https and now it returns the contents of the verification file instead of redirecting to https.

# curl "http://borbach.com/.well-known/acme-challenge/ysITPUa8hTIqNhE7FjrKF9WjF0QDi4AUgdjhK5ioL3U"
ysITPUa8hTIqNhE7FjrKF9WjF0QDi4AUgdjhK5ioL3U.JYseh45lQBxj41K6qwq7KQASWpf6M7NBo1lNHke015E

Here is the recommended way to redirect to https, while making an exception for .well-known to be accessed via http

RewriteEngine On
RewriteCond %{HTTPS} !=on
RewriteCond %{THE_REQUEST} !/.well-known/(.*)$ [NC]
RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

I added the above code to your .htaccess and I reissued Let's Encrypt via Plesk for you and now everything is working as expected.

https://www.sslshopper.com/ssl-checker.html#hostname=borbach.com

  • Thanks 1
  • Krydos changed the title to [Solved] Auto renewal of let's encrypt certificate did not work

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