"Scenario: You have one host [ hoster ] running KVM on UBUNTU
with 1 network interface accessing to internet.
You want to have 2 debian etch virtual servers [ guest ] (
debian01 and debian02 ) running on your hoster with network access
between them and hoster in a local LAN. In this case virtual
servers will not be able to access to internet, but later I will
explain how to do it."