name based virtual domains

as far as i understand... osx server and virtual domains = port based virtual domains (e.g. [b:8cf7cebec5]server.one.nnn:100 + server.two.nnn:200[/b:8cf7cebec5] = 2 port based domains on two different ports) [b:8cf7cebec5]but[/b:8cf7cebec5] apache can be configured to use name based virtual domains (e.g. [b:8cf7cebec5]server.one.nnn + server.two.nnn[/b:8cf7cebec5] = 2 name based domains on the same port question: are the two methods compatible or do i have to choose one or the other? in my opinion, if i need [b:8cf7cebec5]server.two.nnn[/b:8cf7cebec5] to be more "hidden" it would be better to use name based, since the port based alternative would need protection by name/pass to be "hidden". question: how do i enable name based domains while still being able to use Server Settings?