Getting IPv6 up and running
Install the miredo package:
$ sudo apt-get install miredo
After this command, you should see an IPv6 address beginning with '2001:0:' in your network settings (use 'ifconfig'). If so, you're connected to the IPv6 world.
Remove miredo system startup links:
$ sudo update-rc.d -f miredo remove
Usage:
$ sudo /etc/init.d/miredo {start|stop|restart|reload|force-reload}
If miredo is running you should have another interface called 'teredo'.
You can display it with the following command:
$ ifconfig teredo
"