@blinkingline & @alento
It‘s the easiest way for me doing it that way, because I’m not really an expert.
One of the devices which needs a certificate is my pfSense firewall. I think the only way of importing a certificate (besides the manual import via web UI) into the pfSense is to create one via the LE package. Because I’m able to export that certificate to my Ubuntu server (using it for certain purposes) my pfSense is the only instance that creates a wildcard certificate, automatically exports it to my Ubuntu server and restarts all the processes to renew their certificates.
So by now I’m going to renew my certificates for any service I run at home via one click at the pfSense LE package. It’s not that hard, but I was looking for an automated alternative.
I think, the only automatically method to renew my certificates on my pfSense is a web server on the pfSense itself. But I’m afraid of running this method on my firewall. Then I’d better use the dns manual update further.
Finally, I thought that if MiaB is already running a LE validation service I could maybe use it for my home solution as well to validate the same domain. But the deeper I try to inquire into LE’s processes of renewing and validating, the more I think that it would be impossible with the existent solutions, am I right?
Yes, that would be some kind of what I’m looking for. The pfSense’s LE’s package is offering external authentication services as well, but I don’t know if it’s possible to add custom entries. Anyway I wouldn’t be able to do this…