I set up a site in ISPConfig 3 and so long as www is in front of my domain it works, but when I do so without the www I get the Apache2 Ubuntu Default Page. I've got the A records for both www and without pointing to my server, and I've also got the auto-subdomain set to www. Not sure what I'm missing here. OS: Ubuntu 16.04.5 LTS ISPConfig Ver: ISPConfig 3.1dev
What is your server name? It should be something like server.domain.com, using just your domain name could cause such a problem.
The hostname I've set to be like that but when going to the non www domain, it's still showing the Ubuntu Apache error.