[Bug 266598] if_ovpn(4) DCO module not supporting correctly IPv6 tunneling

From: <bugzilla-noreply_at_freebsd.org>
Date: Mon, 26 Sep 2022 07:50:07 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=266598

--- Comment #8 from Marek Zarychta <zarychtam@plan-b.pwste.edu.pl> ---
It looks like packets with traffic class set are invisible to tcpdump(1) but
still being sent by ovpn(4) interface. When the DCO side acts as a receiver,
such packets are not intercepted by ovpn(4), and thus ssh(1) session breaks
when entering interactive mode when ToS is applied also at ssh server side.

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