Problem with SSL certificate on nginx proxy manager

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: obtain SSL certificate on Nginx proxy manager

It produced this output:
I have my proxy manager working and also the proxy entries. But I can't get a certificate for my domain. It says it is unreachable and I get the following error. The log file is non existent.

 Error: Command failed: certbot certonly --config 
 "/etc/letsencrypt.ini" --cert-name "npm-2" --agree-tos -- 
authenticator webroot --email "" -- 
preferred-challenges "dns,http" --domains "" 
 Saving debug log to /var/log/letsencrypt/letsencrypt.log
  An unexpected error occurred:
 port=443): Max retries exceeded with url: /directory (Caused by 
 NewConnectionError(': Failed to establish a new connection: 
 [Errno -3] Temporary failure in name resolution'))
 Ask for help or search for solutions at See the logfile 
 /var/log/letsencrypt/letsencrypt.log or re-run Certbot with -v 
 for more details.

   at ChildProcess.exithandler (node:child_process:397:12)
   at ChildProcess.emit (node:events:390:28)
   at maybeClose (node:internal/child_process:1064:16)
   at Socket. (node:internal/child_process:450:11)
   at Socket.emit (node:events:390:28)
   at Pipe. (node:net:687:12)

My web server is (include version):

The operating system my web server runs on is (include version):
linux mint 20.3
My hosting provider, if applicable, is:
I can login to a root shell on my machine (yes or no, or I don't know):
I'm using a control panel to manage my site (no, or provide the name and version of the control panel):
im just using my host's conf. otherwise it redirects to my homeserver.
The version of my client is (e.g. output of certbot --version or certbot-auto --version if you're using Certbot):
Dont know where to find that, I installed the nginx proxy manager through a docker-compose file.

You probably need to configure the resolver for the container.

This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.