My domain is: radi.invisibletower.de
I ran this command:
sudo ./certbot-auto certonly --standalone -d radi.invisibeltower.de
It produced this output:
Saving debug log to /var/log/letsencrypt/letsencrypt.log Plugins selected: Authenticator standalone, Installer None Obtaining a new certificate Performing the following challenges: http-01 challenge for radi.invisibeltower.de Waiting for verification... Cleaning up challenges Failed authorization procedure. radi.invisibeltower.de (http-01): urn:acme:error:connection :: The server could not connect to the client to verify the domain :: DNS problem: NXDOMAIN looking up A for radi.invisibeltower.de IMPORTANT NOTES: - The following errors were reported by the server: Domain: radi.invisibeltower.de Type: connection Detail: DNS problem: NXDOMAIN looking up A for radi.invisibeltower.de To fix these errors, please make sure that your domain name was entered correctly and the DNS A/AAAA record(s) for that domain contain(s) the right IP address. Additionally, please check that your computer has a publicly routable IP address and that no firewalls are preventing the server from communicating with the client. If you're using the webroot plugin, you should also verify that you are serving files from the webroot path you provided.
My web server is (include version) a raspberry 3
The operating system my web server runs on is (include version): rasbian (debian 9.3)
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
sudo ./certbot-auto --version certbot 0.21.0
I have an AAAA record but no A record because my host is ipv6 only (Raspberry Pi @ home).
For you to check the connection, I have started an unconfigured haproxy. As you can see, it returns a
503 Service Unavailable which is haproxy saying that it is running but without a default backend.
When using certbot, I stop the haproxy service first to free port 80.
I read several other discussions in this community, suggesting that ipv6 only hosts should be possible.
Thanks for any help,