RE: tcpdump

From: Chuck Hemker (
Date: Tue Jan 25 2000 - 19:16:32 EST

On 25-Jan-00 Rakers, Jason wrote:
> Does tcpdump see all traffic on the wire? or just traffic destined for the
> specified interface?

tcpdump defaults to putting the interface in promiscuous mode while it is
running. This means that the interface will receive all packets on the wire.
The "-p" option disables that. "man tcpdump" for more information.

Also remember that switches and bridges can limit what goes down a particular
wire. (They try not to send things down a wire if they don't have to).

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This archive was generated by hypermail 2b29 : Mon Jan 31 2000 - 21:00:32 EST