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
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