I read a lot of post in here about setting the default vhost file of apache but I cannot conclude to anything specific.
So I did this:
I renamed the default file to default.old (in case I need it later) in /etc/apache2/sites-available and I made a symlink of one of my vhost (eg xyz.com.vhost) to default. (ln -s xyz.com.vhost default)
Now I have the default vhost that I want (and not the first available when someone try to access by ip or by unknown subdomain), but I don't know if the above action interfere somehow with ISPConfig.
Does the ISPConfig uses the default vhost (the default file) for some particular reason?