Hi Sepherosa,
I attached a dump. I can provide bigger dumps, but not in public,
because they might contain sensitive data.
The outgoing UDP packets are created by my fastd kernel module [1] that
is a simple UDP tunneling protocol that encapsulates IP packets using
M_PREPEND. Some code is similar to if_vxlan.c.
ICMPv4 echo requests inside of the tunnel lead to invalid checksums in >
95% of the cases. But also other packets types are affected.
[1] https://github.com/digineo/fastd/blob/master/kmod/fastd.c
Regards,
Julian
On 26.09.2017 07:10, Sepherosa Ziehau wrote:
It will be more than helpful, if you can provides tcpdumps.
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