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Date:      Wed, 10 Jan 2018 11:19:08 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-ipfw@FreeBSD.org
Subject:   [Bug 224730] ipfw dyn_keepalive sends a strange packet
Message-ID:  <bug-224730-7515-1p5Ou51Od2@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-224730-7515@https.bugs.freebsd.org/bugzilla/>
References:  <bug-224730-7515@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D224730

Andrey V. Elsukov <ae@FreeBSD.org> changed:

           What    |Removed                     |Added
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                 CC|                            |ae@FreeBSD.org

--- Comment #2 from Andrey V. Elsukov <ae@FreeBSD.org> ---
This packet is generated by ipfw(4) to cause remote host to send the reply,
that will extend lifetime of the STATE, created by keep-state rule. Since
stateful ipfw doesn't track TCP window, it doesn't set this field in the TCP
header. Also it doesn't set any TCP options.

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