If a remote browser connects to a host configured with aaPanel, using a domain name that is configured for the machine through DNS, but not configured as a virtual domain in aaPanel, the browser displays a page entitled Welcome to nginx!, instead of displaying an error page or generating an error code.
How could the site be configured to be less friendly toward attempts to connect from a web browser using domains not configured with the web server?
There are many cases in which a domain might be associated with a machine, running a web server, as does aaPanel, even though the particular domain is not intended for a web site.