IPv6 - Point to Point Tunneling

WINDOWS XP
IPv6 - Point to Point on WIndows XP can be configured like this :
Install IPv6 Interface (do it on command prompt):

# netsh <enter>
# netsh> interface ipv6 <enter>
# netsh interface ipv6> install <enter>

Set the tunneling:

Create the tunnel interface:

netsh interface ipv6 add v6v4tunnel "Interface" <host-ipv4> <endpoint-ipv4>

Add IPv6 address:

netsh interface ipv6 add address "Interface" <tunnel-ipv6host>

Put IPv6 default route on the tunnel router:

netsh interface ipv6 add route ::/0 "Interface" <tunnel-ipv6endpoint>

Additional (it's used as anycast relay that's used for find the nearest router) :

netsh interface ipv6 6to4 set relay 192.88.99.1

For Example:

Interface : "Local Area Connection"
host IPv4 : 192.168.1.1
host IPv6 : 2001:10:10::1
endpoint IPv4 : 192.168.1.2
host IPv6 : 2001:10:10::2

Configuration will be like this :

#netsh interface ipv6 add v6v4tunnel "Local Area Connection" 192.168.1.1 192.168.1.2
#netsh interface ipv6 add address "Local Area Connection" 2001:10:10::1
#netsh interface ipv6 add route ::/0 "Local Area Connection" 2001:10:10::1
#netsh interface ipv6 6to4 set relay 192.88.99.1

LINUX (GENERAL)
You need login as root to use command below.

Create the tunnel interface:

# /sbin/ip tunnel add <interface> mode sit ttl <ttldefault> remote <endpoint-ipv4> local <host-ipv4>

Activate or up the interface:

# /sbin/ip link set dev <interface> up

Add IPv6 address :

# /sbin/ip -6 addr add <tunnel-ipv6host>/<prefix> dev <interface>

Put IPv6 default route on the tunnel router:

# /sbin/ip -6 route add <prefixtoroute> via <tunnel-ipv6endpoint> dev <interface> metric 1

For Example:

Interface : "Local Area Connection"
host IPv4 : 192.168.1.1
host IPv6 : 2001:10:10::1
endpoint IPv4 : 192.168.1.2
host IPv6 : 2001:10:10::2

Configuration will be like this :

# /sbin/ip tunnel add sit1 mode sit ttl 255 remote 192.168.1.2 local 192.168.1.1
# /sbin/ip link set dev sit1 up
# /sbin/ip -6 addr add 2001:10:10::1/64 dev sit1
# /sbin/ip -6 route add 2001:10:10::/64 via 2001:10:10::2 dev sit1 metric 1

DEBIAN / UBUNTU (LINUX)
You need login as root to edit the file.
you can use any editor, such as vi, vim, pico, nano, mcedit, gedit, etc.
open file /etc/network/interfaces

# vi /etc/network/interfaces

Add configuration below

auto <interface>
iface <interface> inet6 v4tunnel
address <tunnel-ipv6host>
netmask <prefix>
endpoint <endpoint-ipv4>
local <host-ipv4>
ttl <ttldefault>
up ip link set dev <interface>
up ip -6 route add <prefixroute> via <tunnel-ipv6endpoint> dev <interface>

For Example:

auto sit0
iface sit0 inet6 v4tunnel
address 2001:10:10::1
netmask 64
endpoint 192.168.1.2
local 192.168.1.1
ttl 255
up ip link set dev sit0
up ip -6 route add 2001:10:10::/64 via 2001:10:10::2 dev sit0

I hope this will be useful for you.
Thank you.

^_^