I’m having a curious problem. I set up a Raspberry with Nextcloud and letsencrypt certificate. For that I created a DynDNS domain at goip.de everything worked fine.
Then I installed a second Nextcloud/letsencrypt behind a different router on a QNAP Server with a different DynDNS, also from goip.de. This also worked fine. After that I wanted to move Nextcloud t another Raspberry. So I deinstalled it on the QNAP and set up the Raspeberry in the same way as Raspi No.1. In this case, however, I cannot create a lewtsencrypt certificate, even if I try to install it at the same HW and System-config as Raspi No.1. I checked and recked the DynDNS settings anf port forwardings.
I don’t know where to look next. Is there any help?
This is my comand at the raspberry and the error report:
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator webroot, Installer None
Obtaining a new certificate
Performing the following challenges:
http-01 challenge for xxxxxxx.goip.de
Using the webroot path /var/www/html for all unmatched domains.
Waiting for verification…
Cleaning up challenges
Failed authorization procedure. xxxxxxx.goip.de (http-01): urn:ietf:params:acme:error:connection :: The server could not connect to the client to verify the domain :: Fetching http://xxxxxxx.goip.de/.well-known/acme-challenge/iyrvSu88b-IhxcFFQ997ddm6WQW63TGrvzoDCGYLykk: Connection refused
The following errors were reported by the server:
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.