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From: Mike Brown <mike@tkg.ca>
Subject: Re: promisc mode
References: <3E1544B9.17967C0A@poczta.onet.pl> 
Date: Mon, 06 Jan 2003 01:36:57 GMT

Maciej Szmit wrote:
> 
> Hi
> 
> I am testing operation systems in promiscuous mode (sniffer detection).
> Could you tell me how turn it in SCO Open Server? Or where can I find
> any programm doing that (like tcpdump in Linux)
> 
> Maciej

Openserver supports tcpdump, it is on TLS604.  The setup requires a
second nic running without an OS binding on it, which means a little
bit of playing with the system files.  The documentation covers all
of the points.

You may wish to look at Network Instruments home page for a discussion
on what is allowed through the various brands of NICs when they
are in promiscuous mode.  Normal cards like a 3COM filter the "bad"
packets out, like runt packets, so you cannot see or count them.

I have used Network Instruments Observer for years, and have one
of their PCMCIA cards that passes most of the available network
packets.  I can use tcpdump for quick and dirty sniffing, but
the advanced features and decoding in a commercial product have
great value.  You can download and test a demo copy from

www.networkinstruments.com

to see if it has any value for you.

Mike

-- 
Michael Brown

The Kingsway Group
 

Take Control of Your Domain Names

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