A fix for this on your end would be to add the additional networks in the VBox settings for the VM; network adaptor 2 should be Host-Only; and network adaptor 3 should be set to Bridged (you can leave out network adaptor 3 if you don't want to connect to the appliance from other machines inside your house).
run sudo nano /etc/network/interfaces
and copy/type in the following lines:
auto eth1 iface eth1 inet dhcp #you can leave the following 2 lines out if you don't want the 3rd adaptor auto eth2 iface eth2 inet dhcp
Save the file and either reboot the appliance or run: sudo ifup eth{1,2}