My domain is: penntech-it.com
I ran this command: sudo certbot certonly --standalone -d unifi.penntech-it.com -v
It produced this output:
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator standalone, Installer None
Requesting a certificate for unifi.penntech-it.com
Performing the following challenges:
http-01 challenge for unifi.penntech-it.com
Waiting for verification...
Challenge failed for domain unifi.penntech-it.com
http-01 challenge for unifi.penntech-it.com
Certbot failed to authenticate some domains (authenticator: standalone). The Certificate Authority reported these problems:
Domain: unifi.penntech-it.com
Type: connection
Detail: 51.140.36.218: Fetching http://unifi.penntech-it.com/.well-known/acme-challenge/WH9m4Bzbmaq8Eqm0MYSgH-H0913a5PSOo_uPQvaFTxU: Timeout during connect (likely firewall problem)
Hint: The Certificate Authority failed to download the challenge files from the temporary standalone webserver started by Certbot on port 80. Ensure that the listed domains point to this machine and that it can accept inbound connections 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.
The operating system my web server runs on is (include version): Ubuntu 22.04.1 LTS
I can login to a root shell on my machine (yes or no, or I don't know): Yes
The version of my client is (e.g. output of certbot --version
or certbot-auto --version
if you're using Certbot): certbot 1.21.0