Ethereal-users: Re: [Ethereal-users] Promiscuous mode

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From: "Ronnie Sahlberg" <ronnie_sahlberg@xxxxxxxxxxxxxx>
Date: Tue, 23 Dec 2003 07:05:34 +1100
It sounds that what you have is really a switch and not a hub. (or possibly
as multi speed hub)

I have seen that in the last few years vendors are selling devices and
calling them hubs when in reality they are switches.
perhaps "hub" is more well known in the consumer markets than "switch"

Another possibility is that you have a dual-speed hub, something that in
reality is one 10Mbit and one 100Mbit hubs connected together
internally by a two port switch.
This also will have the effect you see and will cause you only to see
1, broadcast + multicast ethernet traffic
2, other traffic iff it is to/from another device at the same speed
(physical layer) as the capturing device
3, traffic to/from the capture device


----- Original Message ----- 
From: Eric S.
To: ethereal-users@xxxxxxxxxxxx
Sent: Tuesday, December 23, 2003 4:12 AM
Subject: [Ethereal-users] Promiscuous mode


I am a new user to ethereal, and I don't quite know what I am doing.

I have a Windows 2000 laptop, that I am trying to use.

I downloaded three files.

ethereal-setup-0.10.0
WinPcap_3_01_a
GTK-Runtime-Environment-2.2.4.1

Another user told me that I don't need the GTK file to use the program under
windows.  Is that true?

I have tried the program with the GTK installed, and not installed, and
neither seems to work correctly.

I am able to collect packets, but only ones that are directed at my laptop.
I don't seem to be able to collect the packets that I think are going by my
port.  I have checked "Capture Packets in Promiscuous Mode", but I only get
my own, and broadcasts.  I tested this by going to a computer and pinging my
computer, which showed the requests and replies, but when I ping another
computer, I don't see the icmp protocol.

My ultimate goal of using ethereal is to use it to capture ip telephony
packets.  I have a small demo ip phone system, which I am trying to
troubleshoot.  It is a very simple setup with only a hub, and ip telephone,
my laptop, and the phone system lan card.  I only capture traffic off of the
hub that is directed to my computer.  I am not able to see any packets for
the ip phone.

If anyone had any suggestions, I would be thrilled to hear them!

Eric
bikedog100@xxxxxxxxxxxxx





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