IPv6: teredo

apt install miredo

ifconfig teredo

On Debian and Ubuntu, getting IPv6 connectivity is as easy as running this command in terminal:

sudo apt-get install miredo

You should instantaneously be connected to the internet via IPv6 (provided you have a working IPv4 setup).

If you want to customize your IPv6 connectivity, you can edit the miredo configuration file /etc/miredo.conf as described in the miredo.conf man page. By default, the Ubuntu/Debian package is configured to use the server teredo-debian.remlab.net. Prefer IPv6 (incl. Teredo/Miredo) over IPv4

Add the following lines to your /etc/gai.conf (you can replace the whole file by this):

1. 1. Loopback Address (RFC 4291):

label ::1/128 0

1. 1. The full IPv6 address space:

label ::/0 1

1. 1. 6to4 Addresses (RFC 3056):

label 2002::/16 2

1. 1. Deprecated IPv4 mapped addresses (RFC 4291):

label ::/96 3

1. 1. IPv4 mapped addresses (RFC 5952):

label ::ffff:0:0/96 4

1. 1. Reserved by IETF (RFC 3879):

label fec0::/10 5

1. 1. Unique Local Unicast (RFC 4193):

label fc00::/7 6

1. 1. Teredo addresses (RFC 4380):
2. label 2001:0::/32 7

precedence  ::1/128 50 precedence  ::/0 40 precedence 2002::/16 30 precedence ::/96 20 precedence ::ffff:0:0/96 10