This is normal for that kind of certificates. As you trust your own certificate, you can define a permanent security exception in firefox.
use “let’s encrypt” (and it’s free) in order to generate your certificate for your domain, even if it is a ddns. I had a domain at noip.com something with xxxx (dot) zapto (dot) org and it was working. (looks like new users can put only two links in a post… )
I used this link for my ubuntu 18.04:
https://www.digitalocean.com/community/tutorials/how-to-secure-apache-with-let-s-encrypt-on-ubuntu-18-04
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Yes, of course it would be a far better solution. I wasn’t aware that is works with dynamic addresses. Thanks @protektwar.
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