====== Install Subnet or Virtual Net ======
What we do?
  * bridge
  * fireall with iptables
  * dnsmasq
  * test with virtual machine

====== Bridge ======

====== Iptable rules ======

====== Dnsmasq ======

====== Virtual Machine KVM ======
====== Troubleshooting ======
  * dnsmasq uses config file, in which some configuration does not work. REmove all these files and start dnsmasq with minimal config from command line.