Great Circle Associates Firewalls
(June 1996)
 

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Subject: Re[2]: Network ethernet sniffer
From: Brian Murrell <Brian_Murrell @ bctel . net>
Date: Thu, 27 Jun 1996 07:24:15 -0700 (PDT)
To: adept @ cep . yale . edu
Cc: gunni @ if . is, firewalls @ GreatCircle . COM
In-reply-to: <Pine . LNX . 3 . 91 . 960627093008 . 3251B-100000 @ www . cep . yale . edu>

from the quill of Ben <adept @
 cep .
 yale .
 edu> on scroll
<Pine .
 LNX .
 3 .
 91 .
 960627093008 .
 3251B-100000 @
 www .
 cep .
 yale .
 edu>
> >    is it possible to detect if a machine and then which machine might
> be 
> > sniffing the network if the machines are about 60 - 70 on that subnet.
> > It would be good to know if it is possible and then how if someone
> knows.
> 
> You can use programs to detect if there are any ethernet adaptors in 
> promiscuous mode.

Oh really.  I can have a machine on my network go out and find out which
other adapters are in promiscuous mode??  I rather doubt it, but tell me
more.  What if I have a card constructed to avoid this detection??

b.


--
Brian J. Murrell                                        Brian_Murrell @
 bctel .
 net
BCTel Advanced Communications                                   brian @
 ilinx .
 com
Vancouver, B.C.                                                brian @
 wimsey .
 com
604 454 5279


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