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Old 12-26-2006, 03:25 AM   #1
Registered: Nov 2005
Location: Chennai, India
Distribution: Ubuntu, Slackware 10.2
Posts: 31

Rep: Reputation: 15
delay - authentication falure

If my system authentication fails(I enter a wrong password) why is there a delay before it tells me my credentials are wrong?
I don't see this 'delay' if I'm authed properly. It very quickly returns me shell prompt.

Password:<wrong pass>    
su: Authentication failure /* delay before this line appears */
This question is not linux specific. It applies to all unix variants.

Last edited by slack_prad; 12-26-2006 at 03:28 AM.
Old 12-26-2006, 04:20 AM   #2
Registered: Apr 2005
Location: Florida
Distribution: Slackware 13.1-64bit /
Posts: 45

Rep: Reputation: 17
i would assume to limit a brute force attack.. if you werent given a long delay you could just sit there and try again and again 100 times.. this way atleast you'll frustrate long before your successful


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