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Re: Re[2]: sniffers
From: fc () all net (Dr. Frederick B. Cohen)
Date: Thu, 4 May 1995 03:54:49 -0400 (EDT)


Dan says:
Nayfield, Rod wrote:

| Right.  There is no way.  one of smb's papers (and the book) mention using a 
| sniffer with transmit leads cut.  
| 
| The best protection would be to use switches instead of hubs... even  a 
| multi-port bridge for thinnet is a good idea when you use it to seperate 
| workgroups.
...
Right, no way to detect a sniffer with no transmit lead. But many
funny way to kill it. All you need is 2 machines faster than the
potential sniffer.

I strongly disagree - any sniffing technology can be detected - but the
cost may be too high to be of practical utility for many situations. 
SMB's comments refer strictly to observations of network traffic, and
not to all possible means of detection. 

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