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Date: Tue, 15 Nov 2016 22:20:23 +0100
From: Matlink <matlink@...link.fr>
To: john-users@...ts.openwall.com
Subject: restore jtr with more forks

Okay thank you for your detailed answer.

Now, I wonder why john is still retrying every password contained in the
POT file.

For example if after 24h my POT file contains 50 million of guessed
passwords, john is wasting a lot of time right?


Le 15/11/2016 à 12:35, Rich Rumble a écrit :
> On Tue, Nov 15, 2016 at 4:21 AM, matlink <matlink@...link.fr> wrote:
>> Hello,
>>
>>  I got a situation: I ran for a day john with --fork=5 without telling
>> the attack mode. So it started to crack showing 1/3 next to a percentage
>> of progression. At the end of the day, every fork was at state 3/3, and
>> guessed dozens of million of passwords each.
>>
>> I stopped john, gracefully killing it with 'q'. Every fork stopped
>> normally. I wanted then to rise the number of forks, say 20. I ran john
>> with a new session and a new potfile. However, after dozen of minutes
>> passed, none of the 20 forks did crack a single password.
>>
>> Am I missing something? Should I use the same potfile?
> A new session would be necessary to run more forks that you can
> interrupt and start again. The POT file has lots of your previous
> cracks already, if you weren't specifying a mode, John would of done
> all the same work it did before, and simply not crack anything new
> until the 20 forks passed the work the 5 did previously. Even if you
> specified a different POT, the same passwords would of been cracked,
> it would look like John was doing something, but it was the same work
> as before.The POT file saves the cracked hashes and does not attempt
> to crack the same hashes. John tries all hashes with each guess, so
> until John surpasses where you left off with the 5 threads, you won't
> have any new cracks when running the same command. If you ran a 20
> minute session with 5 forks, the 20 should of caught up in 4-5
> minutes, or 24hrs, in 6 hours, ideally. I think :)
> -rich

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