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Date:      Tue, 24 Dec 2019 15:28:38 +0000
From:      bugzilla-noreply@freebsd.org
To:        net@FreeBSD.org
Subject:   [Bug 242744] IPSec in transport mode between FreeBSD hosts blackholes TCP traffic
Message-ID:  <bug-242744-7501-3l9tPVD8jH@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-242744-7501@https.bugs.freebsd.org/bugzilla/>
References:  <bug-242744-7501@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D242744

--- Comment #22 from Victor Sudakov <vas@sibptus.ru> ---
(In reply to Eugene Grosbein from comment #8)
> Can you enable some TCP service at FreeBSD side (f.e. inetd/echo or ftpd)
> and check it out if Windows sets DF=3D1 for initial encrypted TCP SYN=20
> when you connect from Windows to FreeBSD over such IPSec transport=20
> mode configuration?

I've finally found time to do that. 192.168.3.80 is a Windows 2012 server,
192.168.3.1 is FreeBSD with daytime and ftpd services enabled. As you see f=
rom
the packet dump, all ESP packets have the DF flag set.

--=20
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