Hi, On Sat, Jun 10, 2017 at 03:01:52PM +0200, richard lucassen wrote: > > > http://tmp.xaq.nl/ovpn.stdout > > > > Thanks, that is actually quite enlightening :-) > > > > At 12:38:19, things are set up properly (and it sends one packet, > > because "read from tun/tap" returns one - that might be the OS doing > > IPv6 DAD, hard to say). > > It's a router sollicitation, it pops up in the remote tun device. > The tun device comes up and the up script for disabling router > sollicitations is invoked afterwards (which is obvious because disabling > router sollicitations is impossible when the device is not there yet)
Slightly annoying. This particular one might be avoided, though, by
creating the tunnel beforehand ("openvpn --mktun tun0"), then disabling
RS on it, and *then* running "openvpn --dev tun0 ..." on the pre-existing
tunel device.
> [..]
>
> > Please try whether "--disable-occ" suppresses this. I think it might,
> > but it might only disable *checking* OCC, not *sending* - in which
> > case you need to recompile and remove the "#define ENABLE_OCC" line
> > in src/openvpn/syshead.h to really get rid of OCC. Worth a test.
>
> --disable-occ indeed makes the udp side silent, apart from the first
> router sollicitations.
Getting close :-)
gert
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