hubs and promiscuous packet listening
From: Aaron Wohl (freebsd_at_soith.com)
Date: 08/21/03
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To: questions@freebsd.org Date: Thu, 21 Aug 2003 11:06:55 -0600
Does anyone know the model number of a cheap hub to use when packet
sniffing? The two suposed hubs I have seem to be blocking packets not
addressed to me same as a switch would...
I'm trying tcpdump and ipgrab as root via a hub to listen to anouther
computer. The interface is going into promiscuous mode as ifconfig
shows:
fxp0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu
1500
But I cant see any traffic for the other machines on the hub. I tried
listening on a linux box on the same hub with the same problem... I tried
a second hub, same problem. One hub is a linksys EFAH05W the other is a
linksys NH1005.
I was wondering if linksys labeled a hub because only one packet can pass
thru it and a time and it has no buffereing but its still not spamming
each packet out all the ports like I want it to do for debugging?
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