Configuring the IPv6 tunnel can be easily done in Derbian and Ubuntu Linux using Tunnel Setup Protocol Client (tspc). TSPC is a signalling protocol used to negotiate tunnel setup parameters between two tunnel end-points. Tunnel Setup Protocol Client allows you to connect and browse IPv6 network using IPv4. But before installing TSPC, you need to get IPv6 access through Freenet6. Just register at Freenet6 to obtain a username and password.

Now install tunnel setup prtocol client (tspc) with the following command.

sudo aptitude install tspc

or

sudo apt-get install tspc

This will install tspc.
Now its time to configure tspc. Open the default configuration file located at /etc/tsp/tspc.conf. Open this file in a text editor using a following command :

sudo gedit /etc/tsp/tspc.conf

Now you should give the username, password and hostname registered at Freenet6.

userid : itech
password : 12345678
server ; broker.freenet6.net

Search, userid, server, and passwd variable in file and set them as follows:

userid=your-name
server=broker.freenet6.net
passwd=your-password

Now save and close the file and restart tspc by using the following command :

sudo /etc/init.d/tspc restart

Now you can test the IPv6 connection. First check the IPv6 tunnel address with the help of the following command :

ifconfig tun
Test IPv6 connectivity using the following command

ping6 ipv6.google.com

ping6 www.kame.net

You can use the following commands to start and stop tunnel

sudo /etc/init.d/tspc stop

sudo /etc/init.d/tspc start