From: Chris DiTrani <chris@livedata.com>
To: linux-admin@vger.kernel.org
Subject: Re: looking at the network traffic
Date: 25 Jun 2004 11:27:09 -0400 [thread overview]
Message-ID: <1088177229.4306.7.camel@chris.livedata.com> (raw)
In-Reply-To: <200406251652.54855.fluca1978@virgilio.it>
On Fri, 2004-06-25 at 10:52, Luca Ferrari wrote:
> Hi,
> using program such as ethereal, tcpdump, etc. is it possible to see the
> network traffic also if the hosts are connected thru a switch? I mean, if
> A,B,C, are on the same network, connected with a switch, can A see the
> traffic among B and C? I suppose no, since the switch should route the
> traffic to the right host directly (while an hub should not), and the only
> thing I can see should be message broadcasts and something similar. Is it
> right? Is there a way to observe the traffic over a network even if there are
> switches?
> I don't want to break user's privacy, but since I'm developing a program
> which should connect to a peer-to-peer client, and I don't have protocol
> specifications, I was wondering about a traffic dump of a session among two
> users. Nevertheless I was unable due to (I suppose) the switch.
You are correct, but if you have a managed switch it can likely be set
up with a port seeing all/selected port traffic ('port' in this context
being a physical port on the switch).
CD
next prev parent reply other threads:[~2004-06-25 15:27 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-06-25 14:52 looking at the network traffic Luca Ferrari
2004-06-25 15:27 ` Chris DiTrani [this message]
2004-06-26 6:24 ` Ahsan Ali
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