"To start, NAT is by far the easiest way to get your
guests connected to the interweb, but you may want to use the
guests as servers. For this you need Host Networking. To configure
Host Networking you need to configure network bridging, you
basically go through four steps on the host machine
"Install necessary packages
Declare bridge and real network interface you add to it
Declare virtual interfaces
Set permissions on /dev/net/tun"