Reference: http://stackoverflow.com/questions/1261975/addressing-localhost-from-a-virtualbox-virtual-machine

In Virtual Box - running Windows:

You can reach your localhost via:

http://10.0.2.2

If you need to link to vhosts on your localhost though you need to update the virtual box's hosts file

Enable Notepad to be run as administrator

http://www.7tutorials.com/how-run-programs-administrator-windows-7

Edit the hosts file

windows/system32/drivers/etc/hosts using notepad as admin app

and enter:

10.0.0.2 vhosted-domain.dev