Easy IPv6 connections with miredo
Posted by Steve on Mon 1 Dec 2008 at 19:36
Many services are starting to become available over IPv6, including this site, but the majority of home users cannot access them. If you'd like to see the IPv6 internet chances are it won't be difficult for you though.
One of the most common ways of gaining IPv6 access is via 6to4. This works beautifully if you have a static IP address. The setup is pretty simple too:
The setup described there is simple enough to automate, and you can add the following to /etc/init.d/ipv6 if you have a suitable system:
#!/bin/sh
#
# Auto-configure IPv6 support for the current host via
# 6to4 tunnels
#
# Steve
# --
#
#
# The local addresses
#
ipv4=$(ifconfig eth0 | grep "inet addr" | awk '{print $2}' | awk -F: '{print $2
}')
#
# The IPv6 address we generate
#
ipv6="$(printf "2002:%02x%02x:%02x%02x::1" `echo $ipv4 | tr "." " "`)"
#
# Make sure we get an argument we recognise
#
if [ -z "$1" ]; then
echo "$0 [show|status|start|stop|test]"
exit
fi
case "$1" in
show)
echo "IPv4: $ipv4"
echo "IPv6: $ipv6"
;;
start)
echo "Starting .."
/sbin/ip tunnel add tun6to4 mode sit ttl 30 remote any local $ipv4
/sbin/ip link set dev tun6to4 up
/sbin/ip -6 addr add $ipv6/16 dev tun6to4
/sbin/ip -6 route add 2000::/3 via ::192.88.99.1 dev tun6to4 metric 1
/sbin/ip -6 route add 2000::/3 via 2002:c058:6301::1 dev tun6to4 metric 1
;;
stop)
echo "Stopping .."
/sbin/ip -6 route flush dev tun6to4
/sbin/ip link set dev tun6to4 down
/sbin/ip tunnel del tun6to4
;;
test)
echo "Testing .."
ping6 -c 4 $ipv6
;;
status)
if ( ip link |grep tun6to4 2>/dev/null >/dev/null ) ; then
echo "ipv6 seems to be up"
else
echo "ipv6 seems to be down"
fi
;;
*)
echo "$0 [show|status|start|stop|test]"
;;
esac
But this solution, as well as requiring a static IP address is more complex than it needs to be. It should be possible to easily gain access to the IPv6 internet and thats what the miredo package offers.
miredo is a Unix daemon program which mostly implements the Teredo: Tunneling IPv6 over UDP through NAT Internet proposed standard (RFC 4380) - in short it turns your home connection into an IPv6 client.
To get started install the package:
gold:~# apt-get install miredo
Once you've done that wait a few seconds and you should find that you'll have a new tap device:
gold:~# /sbin/ifconfig br0 Link encap:Ethernet HWaddr 00:1c:25:36:5f:f2 ... ... eth0 Link encap:Ethernet HWaddr 00:1c:25:36:5f:f2 ... ... teredo Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 ...
Here you can see the tunnel end-point, and we can test it out easily enough:
skx@gold:~$ ping6 -c 3 www.debian-administration.org PING www.debian-administration.org(2002:5910:a162::1) 56 data bytes 64 bytes from 2002:5910:a162::1: icmp_seq=1 ttl=56 time=169 ms 64 bytes from 2002:5910:a162::1: icmp_seq=2 ttl=56 time=167 ms 64 bytes from 2002:5910:a162::1: icmp_seq=3 ttl=56 time=167 ms --- www.debian-administration.org ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 2010ms rtt min/avg/max/mdev = 167.446/168.201/169.509/1.042 ms
Now for fun you can point your web browser at http://ipv6.google.com or any other IPv6 enabled website.
apt-get install miredo
Package name is mirEDo
Nice article.
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Thanks, I've fixed this now.
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I suggest AYIYA instead, if proto-41 or 6to4 aren't options for you. AYIYA is a lot more lightweight and reliable. http://madduck.net/docs/ipv6 documents how to do it with Debian.
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I've found it to be pretty stable setup I've not had any outage in the few weeks it has been running.
But AYIYA looks interesting, so thanks for bringing it up.
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I found this blog post and the date is 2006 !!!
http://cquispe.blogspot.com/2006/09/conectadonos-ipv6-via-adsl-co n-teredo.html
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