I have an Ubuntu 14.04 virtual machine. I set the NAT networking option to it.
Without any further changes, I can access to internet from my VM. When I run: cat /etc/network/interfaces
I get this:
ubuntu14@ubuntu14:~$ cat /etc/network/interfaces
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
How come I get internet connection without any interface defined for my NAT ?