modem protective device?

From: Peter Van Epp (vanepp@sfu.ca)
Date: 03/19/03

  • Next message: Frank Knobbe: "RE: Microsoft Windows 2000 WebDAV Buffer Overflow Vulnerability" 
    Date: Wed, 19 Mar 2003 10:49:44 -0800
From: Peter Van Epp <vanepp@sfu.ca>
To: pen-test@securityfocus.com

            While not strictly on topic, assuming they are still made this may
    be of interest to those of you concerned with modems and wardialing.
            Some 20 years ago in a previous life I had a modem protective device
    (a modem condom!) which fronted the modem on the phone line and when dialed
    supplied a sythisized voice which asked you to "enter your code". You then
    fed it a code via DTMF and it (if it liked your code) faked ring to the
    attached modem and then passed the call through when the modem answered. This
    is of course very good protection against war dialing (which is the pen-test
    relevance that I hope will get this through moderation :-)), since the war
    dialer gets a human (or semi human) voice not modem tones. The problem is that
    several google searches on "wardialing modem protection" in various
    combinations turn up lots of articles on war dialing but no references that I
    can see to the product that I want again. Does anyone know a source of such
    a product? I find it hard to believe that such a useful device has died out!

    Peter Van Epp / Operations and Technical Support
    Simon Fraser University, Burnaby, B.C. Canada

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