10-05-2010, 04:29 AM
ksp the -l option is simply a way of telling hashcat to only do so many words from a word list. It was added to give people the ability to script a distributed type system. Lets use your machine speeds as an example setup.
Here are your speeds:
#1 5M
#2 2.5M
#3 3M
Given that you want to use a dictionary of 100 words this is how many each will do:
#1 47.6%
#2 23.8%
#3 28.5%
So to distribute the load evenly so that they would all finish at the same time you can calculate the -s and -l value of each machine.
#1 -l 48 <-- -s option is not needed it will start from 1
#2 -s 48 -l 72
#3 -s 72 <-- -l option is not needed it will finish at 100
Basically the -l option keeps the machine from doing work that another machine is already doing. in the example above if #1 did not have the -l 48 option set it would continue all the way to 100 even though machine 2, and 3 are are already doing that that range. A crafty person could script the whole process.
Here are your speeds:
#1 5M
#2 2.5M
#3 3M
Given that you want to use a dictionary of 100 words this is how many each will do:
#1 47.6%
#2 23.8%
#3 28.5%
So to distribute the load evenly so that they would all finish at the same time you can calculate the -s and -l value of each machine.
#1 -l 48 <-- -s option is not needed it will start from 1
#2 -s 48 -l 72
#3 -s 72 <-- -l option is not needed it will finish at 100
Basically the -l option keeps the machine from doing work that another machine is already doing. in the example above if #1 did not have the -l 48 option set it would continue all the way to 100 even though machine 2, and 3 are are already doing that that range. A crafty person could script the whole process.