YvEs2005

refer:

Tunnelling IPv4/IPv6

Configured tunnels

FreeBSD supports configured tunnels with the gif tunnel-interface. Setting up a manual tunnel requires several steps on the command line.

Beforehand, you need the following information:

$host-ipv4

IPv4-address of the host

$router-ipv4

IPv4-address of the router/tunnel-server

$tunnel-v6host

(Tunnel) IPv6-address of the host

$tunnel-v6router

(Tunnel) IPv6-address of the router

Create the interface:ifconfig gif0 create
Set up the IPv4-endpoints of the tunnel:ifconfig gif0 tunnel $host-ipv4 $router-ipv4Set up the IPv6-endpoints of the tunnel:ifconfig gif0 inet6 alias $tunnel-v6host $tunnel-v6router prefixlen 128Set the (IPv6) default route on the tunnel:route add -inet6 default -interface gif0

LAB :

(D-Link router )

remote: WAN  ipv4 211.1.1.120  ipv6 :2001:238:500::1/64 ,LAN  ipv6:2001::1/64

local     : WAN ipv4 211.1.1.100  ipv6 :2001:238:500::2/64  ,LAN  ipv6 :2001:238:900::1/64 

Create the interface:

#ifconfig gif0 create

Set up the IPv4-endpoints of the tunnel:

ifconfig gif0 tunnel 211.1.1.100 211.1.1.120

Set the (IPv6) default route on the tunnel:

             route add -inet6 default -interface  gif0

or         route add -inet6  default 2001::/64  2001:238:500::1

test  : from remote  lan , ping6 2001:238:500::2 and 2001:238:900::1 successfully