my last attempt to describe the problem here was marked as spam because I tried to post my config immediately after creating the topic.
Sorry that I wanted to make it easy. Never happens again.
Hence now only the problem.
I installed jitsi with Quickinstall and then configured it according to the instructions for secure domain, but anyone can still create a meeting and I have never been asked for authentication.
If I deactivate the anonymous domain, the authentication request comes, but no one else can enter the rooms without authenticating themselves.
Am I doing something wrong? Do I just not understand the concept?