...ok! Thanx Guys...

I get the picture! I just need to create different Vlans (on the very same LAN Card! - like internal, dmz or for example wlan). And of course define the Vlans on the switch.

As I found out myself tagging is supportet by my internal and external Lan-Card (otherwise the card would not know where to send the packets).

Does anyone know how to set up the Astaro for AON Speed (Austria)?
There should be a Dokument on the Astaro KB (says the manual), but I was unable to find it.
Best Regards