It's weird so I don't even know how to put a proper title for it. ISpconfig is the latest version, Ubuntu 18.04, installed and configure according to the howto. Multiserver setup (2 servers, 1 web and 1 mail). If I try to add https on a site where SSL is not activated, apache redirects to the first site in alphabetical order that has ssl activated and it wants to use this sites certificate and that throws a warning. Desired behavior would be not to allow that or maybe redirect to a default error page with something like Code: Redirect 403 / ErrorDocument 403 "Not allowed" I've tried to activate the default-ssl.conf and put this snippet in there, but still same behavior. You can replicate that behavior by using https://<IP_OF_YOUR_SERVER>. I was able to replicate that on every server with apache2 and ispconfig installed. Any idea how I could prevent this ?