#!/bin/sh

# settings
#
IP="/sbin/ip"
MY_ADDR="1.2.3.4"
TTL="64"
#

# program
#
IPv4_SPACED=`echo $MY_ADDR | tr "." " "`
MY_6_ADDR=`printf "2002:%02x%02x:%02x%02x::1" $IPv4_SPACED`
$IP tunnel add tun6to4 mode sit ttl $TTL remote any local $MY_ADDR
$IP link set dev tun6to4 up
$IP -6 addr add $MY_6_ADDR/16 dev tun6to4
#