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RES: Sniffer - How's the best way to deploy ?
From: "Ricardo Perin" <ricardop () locaralpha com br>
Date: Wed, 12 Jul 2006 10:21:26 -0300

I haven't sure if ethereal supports PLC network, I think not.

Some switches have a port called PROBE PORT that is used exactly for this.
All the traffic in the network passes through him. I don't know if Cisco
call this port with other name, but....

Ricardo Perin
 

-----Mensagem original-----
De: Lukasz Szmit [mailto:lukasz.szmit () ucd ie]
Enviada em: quarta-feira, 12 de julho de 2006 08:53
Para: marcioacosta () gmail com
Cc: security-basics () securityfocus com
Assunto: Re: Sniffer - How's the best way to deploy ?

Hi Marcio,

 Our first step is to isolate the PLC possible issue, so we will deploy
a sniffer on the Switch 2955 that this PLC network is connected to. To do
that were going to put a desktop with Ethereal installed on one of empty
port on this switch and mirror the PLC switch port to the desktop switch
port.

 My doubt is: How
s the best way to do it ?

 -  I think this desktop must have two NIC, one with no ip configuration
and other with ip configuration and also connected to another port that we
can collect the data

You would need only one NIC, put into promiscious mode and listening for
traffic on a spanned (monitor session) port. This way you should capture
all data flowing between both endpoints.

-  Whats the best sniffer to harvest this kind of data? Ethereal?

If you're on Unix/Linux tcpdump or ethereal are the best choice, under
Windows you probably won't find anything better than ethereal.

-  Hows the best way to log this data? Is there any software for Windows
to do it?

Well, with ethereal you can save the capture in libpcap format and than
analyze it whenever it suits you - both with tcpdump and ethereal.

regards,
--
Lukasz Szmit
University College Dublin


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what we've learned so far. Our courses are honest, real, technical  
and practical. SensePost willl be at Black Hat Vegas in July. To see  
what we're about, visit us at: 

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