Failed to authenticate some domains

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. crt.sh | example.com), so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.

My domain is:klfachman[.]sk

I ran this command:sudo certbot --nginx -d klfachman[.]sk -d www.klfachman[.]sk -v

It produced this output:

Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator nginx, Installer nginx
Requesting a certificate for klfachman.sk and www.klfachman.sk
Performing the following challenges:
http-01 challenge for klfachman[.]sk
http-01 challenge for www.klfachman[.]sk
Waiting for verification...
Challenge failed for domain klfachman[.]sk
Challenge failed for domain www.klfachman[.]sk
http-01 challenge for klfachman[.]sk
http-01 challenge for www.klfachman[.]sk
Certbot failed to authenticate some domains (authenticator: nginx). The Certificate Authority reported these problems:
Domain: klfachman[.]sk
Type: connection
Detail: 64.227.117.171: Fetching http://klfachman[.]sk/.well-known/acme-challenge/SjuPiBI6gXARKKfPJt7MiEcgI-2WtOBdKhFwBQf9Hx0: Error getting validation data
Domain: www.klfachman[.]sk
Type: connection
Detail: 64.227.117.171: Fetching http://www.klfachman[.]sk/.well-known/acme-challenge/lv91pWidT_PhBIV0qJe-Q8BT1OdhYCYK2KbL8lmjvWE: Error getting validation data
Hint: The Certificate Authority failed to verify the temporary nginx configuration changes made by Certbot. Ensure the listed domains point to this nginx server and that it is accessible from the internet.
Cleaning up challenges
Some challenges have failed.
Ask for help or search for solutions at https://community.letsencrypt.org. See the logfile /var/log/letsencrypt/letsencrypt.log or re-run Certbot with -v for more details.

My web server is (include version):nginx version: nginx/1.24.0 (Ubuntu)

The operating system my web server runs on is (include version):Ubuntu 24.04.1 LTS

My hosting provider, if applicable, is: DigitalOcean

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):certbot 2.12.0.dev0

I don't know what's going on with your webserver, but every request made, using HTTP or HTTPS, gets disconnected immediately after the connection has been made.

Please make sure you have a working website/nginx before trying again.

1 Like

I have checked, nginx is running and app is being restarted and running with pm2 now.

this is output of check, if it helps

:/var/www/klfachman.sk# sudo systemctl status nginx
● nginx.service - A high performance web server and a reverse proxy server
     Loaded: loaded (/usr/lib/systemd/system/nginx.service; enabled; preset: enabled)
     Active: active (running) since Sun 2024-11-03 21:31:56 UTC; 9h ago
       Docs: man:nginx(8)
    Process: 89989 ExecStartPre=/usr/sbin/nginx -t -q -g daemon on; master_process on; (code=exited, status=0/SUCCESS)
    Process: 89991 ExecStart=/usr/sbin/nginx -g daemon on; master_process on; (code=exited, status=0/SUCCESS)
   Main PID: 89992 (nginx)
      Tasks: 2 (limit: 509)
     Memory: 1.8M (peak: 4.1M)
        CPU: 3.629s
     CGroup: /system.slice/nginx.service
             β”œβ”€89992 "nginx: master process /usr/sbin/nginx -g daemon on; master_process on;"
             └─89993 "nginx: worker process"

Nov 03 21:31:56 ubuntu-s-1vcpu-512mb-10gb-fra1-01 systemd[1]: Starting nginx.service - A high performance web server and a reverse proxy server...
Nov 03 21:31:56 ubuntu-s-1vcpu-512mb-10gb-fra1-01 systemd[1]: Started nginx.service - A high performance web server and a reverse proxy server.
root@ubuntu-s-1vcpu-512mb-10gb-fra1-01:/var/www/klfachman[.]sk# sudo systemctl restart nginx
root@ubuntu-s-1vcpu-512mb-10gb-fra1-01:/var/www/klfachman[.]sk# sudo certbot --nginx -d klfachman.sk -d www.klfachman[.]sk -v
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator nginx, Installer nginx
Requesting a certificate for klfachman[.]sk and www.klfachman[.]sk
Performing the following challenges:
http-01 challenge for klfachman[.]sk
http-01 challenge for www.klfachman[.]sk
Waiting for verification...
Challenge failed for domain klfachman[.]sk
Challenge failed for domain www.klfachman[.]sk
http-01 challenge for klfachman[.]sk
http-01 challenge for www.klfachman[.]sk

Certbot failed to authenticate some domains (authenticator: nginx). The Certificate Authority reported these problems:
  Domain: klfachman[.]sk
  Type:   connection
  Detail: 64.227.117.171: Fetching http://klfachman[.]sk/.well-known/acme-challenge/kPzEkhkFXpKWcOqG7F9Q_mlxt85-Zo6UH0URXDIa4Fo: Error getting validation data

  Domain: www.klfachman.sk
  Type:   connection
  Detail: 64.227.117.171: Fetching http://www.klfachman[.]sk/.well-known/acme-challenge/MzPcft8V0z2C7XqZWkCWL3wIoXlTV212J2rNdc-VNxw: Error getting validation data

Hint: The Certificate Authority failed to verify the temporary nginx configuration changes made by Certbot. Ensure the listed domains point to this nginx server and that it is accessible from the internet.

Cleaning up challenges
Some challenges have failed.
Ask for help or search for solutions at https://community.letsencrypt.org. See the logfile /var/log/letsencrypt/letsencrypt.log or re-run Certbot with -v for more details.

I don't know what pm2 is, but this is what I see when connecting to your hostname:

osiris@erazer ~ $ curl -v http://klfachman[.]sk/
* Host klfachman.sk:80 was resolved.
* IPv6: (none)
* IPv4: 64.227.117.171
*   Trying 64.227.117.171:80...
* Connected to klfachman[.]sk (64.227.117.171) port 80
> HEAD / HTTP/1.1
> Host: klfachman[.]sk
> User-Agent: curl/8.7.1
> Accept: */*
> 
* Request completely sent off
* Empty reply from server
* Closing connection
curl: (52) Empty reply from server
osiris@erazer ~ $ 

Which is not a proper nginx reply.

Maybe there's a firewall blocking stuff?

When I try to connect with HTTPS, after the certificate has been send, the connection is also closed. But the cert is a self-signed cert with commonName "RC" with organisation "Jasmeet", does that ring any bell?

2 Likes

It does not, I will try to reconfigure hosting instance from scratch and will reply. Maybe some config bug I've missed. I do not know what else do right now in that case

Or check your DNS and make sure the public IP is for your server. Otherwise contacting Digital Ocean support is probably best.

3 Likes

image
VirusTotal - URL

2 Likes

What does this mean, can you kindly help me understand what is going?

I have checked DNS. It is correct, I was able to reboot the address on http only with nginx server, also obtain https with apache but thats all where my knowledge of apache ends. Nginx still throws

sudo certbot --nginx -d klfachman[.]sk -d www.klfachman[.]sk
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Enter email address (used for urgent renewal and security notices)
 (Enter 'c' to cancel): 
Invalid email address: .


If you really want to skip this, you can run the client with
--register-unsafely-without-email but you will then be unable to receive notice
about impending expiration or revocation of your certificates or problems with
your Certbot installation that will lead to failure to renew.

Enter email address (used for urgent renewal and security notices)
 (Enter 'c' to cancel): [redacted]@gmail.com

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(Y)es/(N)o: y
Account registered.
Requesting a certificate for klfachman[.]sk and www.klfachman[.]sk

Certbot failed to authenticate some domains (authenticator: nginx). The Certificate Authority reported these problems:
  Domain: klfachman[.]sk
  Type:   connection
  Detail: 167.99.246.252: Fetching http://klfachman[.]sk/.well-known/acme-challenge/i4m2GpSKUy6ttlnBUlS7y0JO_rDHFoFs6PCiR1qxR0w: Timeout during connect (likely firewall problem)

  Domain: www.klfachman[.]sk
  Type:   connection
  Detail: 167.99.246.252: Fetching http://www.klfachman[.]sk/.well-known/acme-challenge/qq0dkZK3L8YSTktVq0TzRcTeff50FSHMeEqyHKfxSgE: Timeout during connect (likely firewall problem)

Hint: The Certificate Authority failed to verify the temporary nginx configuration changes made by Certbot. Ensure the listed domains point to this nginx server and that it is accessible from the internet.

Some challenges have failed.
Ask for help or search for solutions at https://community.letsencrypt.org. See the logfile /var/log/letsencrypt/letsencrypt.log or re-run Certbot with -v for more details.

Is there something else I can try? I went according:

You need to ensure that the Internet can reach your system via HTTP.

1 Like

Does that problem still occur? Because I see a different IP address used now which is reachable (at least from some parts of world)

2 Likes

hmm...
I get:

Name:    klfachman[.]sk
Address: 46.101.177.204
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Yep, just like Let's Debug says too

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