La ayuda realmente indica cómo funciona esto; y la verdad que ya esta hecho ForDummies!
Acá algunas ligas que platican las cosas para versiones anteriores a la 2.1.
>> Virtualbox Case Study: Making host only networking work between two Ubuntu Guest OS (virtual machine) on Windows Vista host
http://opensourceexperiments.wordpress.com/2008/04/18/virtualbox-case-study-making-host-only-networking-work-between-two-ubuntu-guest-os-virtual-machine-on-windows-vista-host/
>> Case study: Making Internal networking for talking between two linux guest OS (Ubuntu) on windows vista host
http://opensourceexperiments.wordpress.com/2008/04/13/case-study-configuring-internal-networking-work-for-talking-two-linux-guest-os-ubuntu-on-windows-vista-host/
>> VirtualBox: how to ftp from a Solaris host to a WinXP guest : 1. d4 d5 2. c4 ...
http://blogs.sun.com/rmanus/entry/virtualbox_how_to_ftp_from
>> VirtualBox - Testing Networks - Creating testbed networks of virtual machines, host Windows XP, guest Redhat Enterprise Linux
http://www.virtualbox.org/wiki/Testing_Networks
Acá algunas ligas que platican las cosas para versiones anteriores a la 2.1.
>> Virtualbox Case Study: Making host only networking work between two Ubuntu Guest OS (virtual machine) on Windows Vista host
http://opensourceexperiments.wordpress.com/2008/04/18/virtualbox-case-study-making-host-only-networking-work-between-two-ubuntu-guest-os-virtual-machine-on-windows-vista-host/
>> Case study: Making Internal networking for talking between two linux guest OS (Ubuntu) on windows vista host
http://opensourceexperiments.wordpress.com/2008/04/13/case-study-configuring-internal-networking-work-for-talking-two-linux-guest-os-ubuntu-on-windows-vista-host/
>> VirtualBox: how to ftp from a Solaris host to a WinXP guest : 1. d4 d5 2. c4 ...
http://blogs.sun.com/rmanus/entry/virtualbox_how_to_ftp_from
>> VirtualBox - Testing Networks - Creating testbed networks of virtual machines, host Windows XP, guest Redhat Enterprise Linux
http://www.virtualbox.org/wiki/Testing_Networks