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Date:      Tue, 23 Nov 2021 22:38:00 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 259864] PF periodically drops packets that belong to established session, thus stalling the session
Message-ID:  <bug-259864-227-pXV0I0AtKM@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-259864-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-259864-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D259864

--- Comment #5 from Kristof Provost <kp@freebsd.org> ---
I've managed to spend a little time looking at this, and I am very confused.

When we see the error messages pf rejects the packet because the
acknowledgement number is too far out of the window it thinks the TCP sessi=
on
got to.
However, it looks like it stopped updating the ack window some time ago, an=
d I
have no idea why it'd do that. The packets that should have updated it pass=
ed
through just fine.

Is this 100% reproducible for this setup, or does it only happen occasional=
ly?
If so, how often? When did this problem start happening (I don't think we've
touched any of the relevant code any time recently.)?

--=20
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