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: americanpenguin.dynv6.net
I ran this command: certbot certonly --standalone
It produced this output:
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Please enter the domain name(s) you would like on your certificate (comma and/or
space separated) (Enter 'c' to cancel): americanpenguin.dynv6.net
Requesting a certificate for americanpenguin.dynv6.net
Certbot failed to authenticate some domains (authenticator: standalone). The Certificate Authority reported these problems:
Detail: 2605:59c8:251b:a310:6445:5fff:fe86:ff82: Fetching http://americanpenguin.dynv6.net/.well-known/acme-challenge/oYz9l28D5rb7KydLxWchvggm5LjZDGuw6BeXEyleGIY: 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.
Some challenges have failed.
My web server is (include version): CUPS Latest
The operating system my web server runs on is (include version): Fedora 36
My hosting provider, if applicable, is: Starlink
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): 2.1.0
Other information: I'm trying to use IPv6 because I have a real IPv6 address; IPv4 is NAT'ed. I have a TCP dump and I can see it's successfully connecting to the temporary web server over 80 on IPv6 and for some reason, IPv4 is showing traffic. Disabled IPv4 and it shows the same error. I just want a cert so I can print from anywhere.