Packet loss when connecting via IPv6

[Johannes Brechtmann]

On Fri, 29 Jan 2016 08:39:58 +0000
David Woodhouse <dwmw2 at infradead.org> wrote:

> On Fri, 2016-01-29 at 08:34 +0100, Nikos Mavrogiannopoulos wrote:
> > On Thu, 2016-01-28 at 21:01 +0100, Johannes Brechtmann wrote:  
> > > Sorry, got something wrong: AnyConnect doesn't connect to the
> > > server via IPv6 at all.
> > > Openconnect sets the MTU to 1350, setting it manually after 
> > > connextion is established to 1178 fixed it for me.
> > > Thanks for the hint to look at the MTU.  
> > 
> > That's strange, an MTU less than 1280 cannot carry IPv6 packets.  
> 
> So he fixed it by disabling IPv6? :)
> 
> -- 
> dwmw2
> 

Yes, but didn't noticed because of the lack of IPv6 capable servers
inside the network I connect to.
I guess this a problem with my IPv6 uplink.

Johannes