[Bug 273664] ovpn(4) DCO module doesn't support "multihome" option

From: <bugzilla-noreply_at_freebsd.org>
Date: Mon, 11 Sep 2023 17:44:20 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=273664

--- Comment #5 from Marek Zarychta <zarychtam@plan-b.pwste.edu.pl> ---
After investigating it a bit further I was told by OpenVPN devs that "multihome
will ensure that the UDP source IP is the one that the other end sent its
packets to".
It's not yet supported by FreeBSD DCO implementation which only performs simple
route lookup and sends the packets with the source IP of the outgoing
interface.
It's a minor bug of our DCO module, perhaps it will be fixed in the future, but
apparently, Linux implementation does support "multihome" just fine.

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