As suggested in https://www.whonix.org/wiki/Security_Guide#VirtualBox_Hardening
The first thing i want to ask why on gateway by default “Shared Clipboard” is enabled (Host To Guest) ? On workstation it is disabled, i think if its useful is more usefull on workstation.
In the link above you talking about removing floppy,dvd from virtualbox instance. Do you mean removing these from boot order and/or storage menu ?
If removing from storage menu, do i only need remove DVD device only or controler also ?
I notice that i have VNC extension in my virtualbox, can i remove that for hardering ?