Semplicissimo script bash aggiornato,semplificato e corretto per la configurazione automatica dell’indirizzo ipv6 via 6to4:

  

    # ax,ax@slackware.eu 6to4 tunnel NAT 

    # private test version - contribute > ALL 

    # https://bitbucket.org/a1cs/bash/raw/8e333e6099a5df7f46c6cd7203eee59e4891b593/6to4.sh

    

    ip tunnel del 6to4 2>/dev/null

    if [ "${1}" = "stop" ]; then

      exit

    fi

    ip4="`wget -qO- ifconfig.co`";

    # Set default route

    relay=192.88.99.1

    # modify dev var for your kernel. 

    localip=$(ip -o addr show dev eth0 | sed -e's/^.*inet \([^ ]*\)\/.*$/\1/;t;d')

    

    echo $ip4 $localip

    prefix=$(printf '%02x%02x:%02x%02x\n' $(echo $ip4 | sed 's/\./ /g'))

    if [ -z "$localip" ]; then

      ip tunnel add 6to4 mode sit ttl 64 remote any local $ip4

    else

      ip tunnel add 6to4 mode sit ttl 64 remote any local $localip

    fi

    ip link set dev 6to4 mtu 1280

    ip link set dev 6to4 up

    ip addr add 2002:$prefix::1/16 dev 6to4

    ip -6 route add 2000::/3 via ::$relay dev 6to4 metric 1
  

# End