samedi 8 juin 2013

Configure your Ubuntu box as a IPv6 router

  1. Edit /etc/sysctl.conf
Uncomment the line which contains net.ipv6.conf.default.forwarding=1. This is a common step to enable IPv6 routing.
Alternatively, if you want to use radvd which will advertise your prefix and let the network's systems select their own IP address:
  1. Install radvd
sudo aptitude install radvd
  1. Edit /etc/radvd.conf (see following sample)
Note: If the computer is only routing IPv6, then only uncomment net.ipv6.conf.default.forwarding=1 and leave the IPv4 stuff unchanged.
Note: /etc/radvd.conf: This file does not exist after a fresh install. You can look at the sample configuration files in usr/share/doc/radvd/examples/ for further studies.
Sample /etc/radvd.conf:
interface eth0
   AdvSendAdvert on;
   prefix 2001:xxxx:xxxx::/64
        AdvOnLink on;
        AdvAutonomous on;
eth0 is the interface which is used for the Router Advertising messages (RAs). If you are not sure about the interface, check with <tt>ip addr</tt> on the command line.
The prefix you have to take from the information given by SixXS or Hurricane Electric.
Restart the router advertising daemon to propagate your IPv6 address space
sudo /etc/init.d/radvd restart
Now router should automatically send "Router Advertising Messages" to your network and your IPv6 clients should auto configure them self.

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