IPv6 Connectivity

[Nikos Mavrogiannopoulos]

On Wed, Jan 29, 2014 at 6:58 PM, Nikos Mavrogiannopoulos
<n.mavrogiannopoulos at gmail.com> wrote:
> On Wed, Jan 29, 2014 at 6:52 PM, David Woodhouse <dwmw2 at infradead.org> wrote:
>>> Ok I spent some time on it and it seems it works (fortunately with the
>>> legacy ioctls()). I'm not sure if that's entirely correct since
>>> ifconfig on my fedora doesn't report the IPv6 on the tun device,
>> Show output of 'ip -6 addr list dev tun0' ?
> Empty as well. I must have missed something there, or set the IP in a
> peculiar way. I'm too tired to find out now.

It seems that this was an MTU issue. Once the MTU is set over 1280
bytes in the tun device the IPv6 address appears. I've now adjusted
the way the suggested MTU value from openconnect (which seems fixed to
1280) is taken into account and a larger MTU is negotiated, thus
allowing IPv6.

regards,
Nikos