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Date:      7 Apr 2003 13:35:59 +0200
From:      "clemens fischer" <>
To:        "Frans =?iso-8859-15?q?Gidl=F6f?=" <>
Cc:        freebsd-ipfw@FreeBSD.ORG
Subject:   Re: Prioritizing empty TCP ACKs
Message-ID:  <>
In-Reply-To: <> (Frans =?iso-8859-15?q?Gidl=F6f's?= message of "Sun, 6 Apr 2003 17:24:36 +0200")
References:  <>

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Frans Gidlöf <>:

> So how do you catch one of those tcp-ack-no-payload packets with
> IPFW?.

AFAIK ipfw doesn't (yet?) have that iplen thing, but ipfw2 has it, or
will have it.  you might experiment with `tcpoptions ...' and
`established', though.  i don't want to do that, but am still
interested if these less powerful measures make a difference, so keep
us posted, please.


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