I am encountering an issue while trying to obtain an SSL certificate for my domain ai.chaoss.io using Certbot with the Nginx plugin. When I attempt to request the certificate, I receive the following error message:
Certbot failed to authenticate some domains (authenticator: nginx). The Certificate Authority reported these problems:
Domain: ai.chaoss.io
Type: unauthorized
Detail: 67.6.94.219: Invalid response from https://ai.chaoss.io/.well-known/acme-challenge/5FbJtD7b_4og0nMJz7T1rlvZ6mrYw6pYCMFJMDS45O8: 404
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.
Steps Taken:
DNS Resolution: I checked the DNS resolution for ai.chaoss.io, and it correctly points to the server with IP address 67.6.94.219:
nslookup ai.chaoss.io
Server: 127.0.0.53
Address: 127.0.0.53#53
Non-authoritative answer:
ai.chaoss.io canonical name = chaoss.tv.
Name: chaoss.tv
Address: 67.6.94.219
Name: chaoss.tv
Address: 64:ff9b::4306:5edb
Certbot Command: I ran the following command:
sudo certbot --nginx -d ai.chaoss.io
Issue: The error suggests that Certbot cannot verify the domain via Nginx because it receives a 404 error when trying to access the temporary challenge file at https://ai.chaoss.io/.well-known/acme-challenge/.
Nginx Configuration: I have verified that Nginx is running and correctly serving the site at ai.chaoss.io, but the temporary files needed for the verification challenge aren't being served.
Challenge URL Issue: The challenge URL seems to return a 404, indicating that the file is either not accessible or not placed in the right location by Certbot.