Re: Intrusion Detection

From: Aleph One (aleph1at_private)
Date: Tue Apr 14 1998 - 14:21:45 PDT

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    On Tue, 14 Apr 1998, Marcus J. Ranum wrote:
    
    > Adam,
    > 
    > 	To me the big open question in ID is "why?" not "what?"
    
    Because if you do not alert the user that he is under attack by the
    attacks that you can detect and evade he will never know when the hacker
    moves on to some new attack your gizmo does not know about yet. Most
    attacker will move from one technique to the next until they find one that
    works.
    
    For example, if someone portscans you and finds you are running a daemon
    for the FOO protocol in port 666 with a bug he knows about but your IDS
    does not and the IDS does not report the portscan because you don't want to
    be bothered then you have just thrown out the only clue you had that you
    may have been broken into.
    
    Aleph One / aleph1at_private
    http://underground.org/
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