After trying every single tip I could find on the net, I finally managed to get IPV6 working. Unlike other approaches, I decided to do my scripting in such a way I could easily toggle back and forth from the tunnel broker and just IPV6 to IPV4 tunnel. I did this since it gives me a good way to tell the difference between a tunnel problem, and generic IPV6 intranet problem.
First the main script. This is a re-factorization of other scripts I've seen on the net. Install as /jffs/updateipv4.sh:
#!/bin/sh -x
#SAMPLE USERID="29812e32f424324324234"
USERID="<insert value here>"
#SAMPLE PASSWORD="CatsAndDogs"
PASSWORD="<insert value here>"
#SAMPLE TUNNEL_ID="96782"
TUNNEL_ID="<insert value here>"
#SAMPLE CLIENT_IPV6_ADDRESS="2001:271:18:2c7::2/64"
CLIENT_IPV6_ADDRESS="<insert value here>"
#SAMPLE SERVER_IPV4_ADDRESS="218.65.27.48"
SERVER_IPV4_ADDRESS="<insert value here>"
echo >> /tmp/wanip
WANIP_OLD=`cat /tmp/wanip`
WANIP=$(ip -4 addr show dev vlan2 | grep 'inet ' | awk '{print $2}' | cut -d/ -f
if [ -n "$WANIP" ]
then
if [ "$WANIP" != "$WANIP_OLD" ]
then
echo "External IP: $WANIP" 1>&2
ROUTED_ADDRESS=`sed -n -e 's,^ *prefix *\([^ ]*\) *{,\1,p' /tmp/radvd.co
if [ $ROUTED_ADDRESS = "0:0:0:1::/64" ]
then
CLIENT_IPV6_ADDRESS=""
fi
ip tunnel del tun6to4 2>>/dev/null
ip tunnel del he-ipv6 2>>/dev/null
if [ -n "$CLIENT_IPV6_ADDRESS" ]
then
echo "Configure he-ipv6 tunnel" 1>&2
MD5PASSWORD=`echo -n "$PASSWORD"|md5sum|sed -e 's/ *-//g'`
/usr/bin/wget '
http://ipv4.tunnelbroker.net/ipv4_end.php?ipv4b='AUTO ip tunnel add he-ipv6 mode sit ttl 255 remote $SERVER_IPV4_ADDRESS l
ip link set he-ipv6 up
ip addr add $CLIENT_IPV6_ADDRESS dev he-ipv6
ip route add ::/0 dev he-ipv6
BR0_MAC=$(ifconfig br0 |sed -n -e 's,.*HWaddr \(..\):\(..\):\(..\):\
# These commands aren't on HE's website, but they're necessary for t
ip -6 addr add $(echo "$ROUTED_ADDRESS"|sed "s,::/..,::$BR0_MAC/64,"
ip -6 route add 2000::/3 dev he-ipv6
else
echo "Configure tun6to4 tunnel" 1>&2
V6PREFIX=$(printf '2002:%02x%02x:%02x%02x' $(echo $WANIP | tr . ' ')
ip tunnel add tun6to4 mode sit ttl 255 remote any local $WANIP
ip link set tun6to4 mtu 1480
ip link set tun6to4 up
ip -6 addr add $V6PREFIX:0::1/16 dev tun6to4
ip -6 addr add $V6PREFIX:1::1/64 dev br0
ip -6 route add 2000::/3 via ::192.88.99.1 dev tun6to4
fi
echo 1 > /proc/sys/net/ipv6/conf/all/forwarding
fi
fi
Be sure to run 'chmod ugo+rx /jffs/updateipv4.sh'.
Next the startup script. Set this in your startup under Administration->Commands->Startup:
#Enable IPV6
insmod /lib/modules/`uname -r`/kernel/net/ipv6/sit.ko
sleep 5
radvd -C /tmp/radvd.conf start
sleep 5
rm -f /tmp/wanip
/jffs/updateipv6.sh 2> /jffs/startup.debug
kill -HUP $(cat /var/run/radvd.pid)
sleep 10
echo "starting radvd" >> /jffs/startup.debug
radvd -C /jffs/radvd.conf start &
Finally, Radv5 config. Set this under Administration->Management->IPV6 Support->Radvd config:
interface br0 {
MinRtrAdvInterval 3;
MaxRtrAdvInterval 10;
AdvLinkMTU 1480;
AdvSendAdvert on;
prefix <insert value here> {
AdvOnLink on;
AdvAutonomous on;
AdvValidLifetime 86400;
AdvPreferredLifetime 86400;
# Base6to4Interface vlan2;
};
};
The prefix value should be your Route 64 address. e.g. 2001:270:1c:1d8::/64
If instead you wish to use an IPV6 to IPV4 bridge instead use an address of 0:0:0:1::/64 and uncomment the Base6to4Interface line like the following:
interface br0 {
MinRtrAdvInterval 3;
MaxRtrAdvInterval 10;
AdvLinkMTU 1480;
AdvSendAdvert on;
prefix 0:0:0:1::/64 {
AdvOnLink on;
AdvAutonomous on;
AdvValidLifetime 86400;
AdvPreferredLifetime 86400;
Base6to4Interface vlan2;
};
};
Walla. Once everything is saved you are ready to reboot your router. If things don't work try running the updateipv6.sh script interactively. Note: I've designed the updateipv6.sh script so it can be rerun regularly to pickup a new wan ip address. So if the wanip is the same as the last time it ran, it does nothing. If you want to force it to run anyway (for debugging purposes), the simply remove the /tmp/wanip file first. e.g.
$ rm /tmp/wanip;/jffs/updateipv6.sh
Regards,
Bill
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