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Date:      Wed, 8 Nov 2000 11:04:42 +0100 (CET)
From:      Konrad Heuer <kheuer@gwdu60.gwdg.de>
To:        Kris Kennaway <kris@FreeBSD.ORG>
Cc:        freebsd-hackers@FreeBSD.ORG, freebsd-security@FreeBSD.ORG
Subject:   Re: TCPDUMP patch v1.1 and AppleTalk
Message-ID:  <Pine.BSF.4.21.0011081055140.5884-100000@gwdu60.gwdg.de>
In-Reply-To: <20001107223959.B41350@citusc17.usc.edu>

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On Tue, 7 Nov 2000, Kris Kennaway wrote:

> On Tue, Nov 07, 2000 at 01:56:21PM +0100, Konrad Heuer wrote:
> 
> > After patching and installing, tcpdump can't be used anymore since it puts
> > very heavy load onto the network via xl0 and AppleTalk broadcast messages
> > (one message each 0.2 ms). Sorry, in the moment I don't know more details
> > ...
> 
> tcpdump shouldn't be sending any appletalk packets, I thought (I may
> be wrong, never used it on an appletalk network). Are you sure this is
> the problem?
> 
> Kris
> 

Well, I don't know exactly what happens but I seems to be more complex
than I thought first. It doesn't happen each time I start tcpdump but when
some circumstances meet which I don't know my FreeBSD host begins to flood
the network with AppelTalk broadcast requests as long as tcpdump keeps
running. Killing tcpdump kills this flooding, too. I've never observed
such a situation before I applied the last patch, and I use tcpdump
frequently to analyze the one or other problem. On the other hand, our
network environment isn't static, of course, and I can't be sure about
other things that may have been changed from day to day.

Konrad



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