#- VDE2
 #- (ref: http://vde.sourceforge.net)

 #- VDE can be used to configure QEMU Guest access to the local HOST network:
 #- (ref: http://people.redhat.com/berrange/olpc/sdk/network-bridge.html)
 #- (ref: http://blog.bravecobra.com/index.php/linux?p=41&more=1&page=2)

 vde_switch -tap tun -daemon
 ifconfig tun 192.168.193.225  # (some free subnet & ip address)
 chmod 666 /tmp/vde.ctl  # allow users control access

 #- Use ifconfig to verify whether the TUN device has the specified IP address:
 ifconfig       #- TUN address acts as the GATEWAY for the QEMU Guest. 

 #- Set TUN gateway to forward packets to eth0 (our LAN/Internet connection)
 #- To do this we use iptables:

 echo "1" > /proc/sys/net/ipv4/ip_forward  # allow forwarding
 iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE

 vdeqemu -hda hd.img -boot c  # EXAMPLE QEMU INVOCATION

 #- In QEMU configure networking to use another IP in the local subnet with a
 #- gateway corresponding to the TUN device IP:

 #- * IP:         192.168.193.226 (some free address in our new subnet)
 #- * subnetmask: 255.255.255.0
 #- * gateway:    192.168.193.225 (HOST TUN device)
 #- * DNS:        set it the same as your host OS