I have an apache server configured with multiple NameVirtualHosts running on the same IP. This all works fine.
However, because of the "include conf.d/*" directive, apache also picks up config for cacti and phpmyadmin, which add in aliases for /cacti and /phpmyadmin, and those aliases appear to be valid for all virtualhosts. That is to say, I can go to http://firstvirtualhost/cacti and also http://secondvirtualhost/cacti, and I get the same page.
In my case, the default namevirtualhost is publicly visible, and I do not want tools like phpmyadmin or cacti to be visible under that URL
In fact, I don't want any random package to be able to make itself visible across all virtualhosts simply by creating a file for itself in conf.d.
You have to delete the line include conf.d from the global Apache configuration file, and optionally add it to your own private virtual host configuration file.