How to provide network access to a VirtualBox virtual machine bypassing the Windows it's running on?

Question

Computer networks

I have Win7 running VirtualBox with Ubuntu on board. Network cable connected to Win7. It is necessary that Win7 cannot access the Internet through it, but the virtual machine can.
Tell me, is it possible to organize this?

Answer 1

Pppoe as the type of connection to the external. Or just remove the gateway from the mother axis

Answer 2

close the firewall access to the network to any applications acromy virtualbox.

Answer 3

In the windows, register non-existent dns, and in the virtual machine it will pick up everything itself or register it manually for tench