Today is still one of the best tools available for password cracking – definitely the best when using CPUs’. Extremely feature rich, very fast, free and actively maintained. We will use John the Ripper (JtR) which is a remarkable piece of software. Therefore is recommended you run this type of scenarios in a controlled and isolated lab environment. In our case we will be downloading the ISO and installing it on the different systems. Please note all the steps will be done using the privileged root account due to the Kali Linux Root Policy. Depending on the reader’s choice, Kali Linux is available in ISO or VM. This distribution brings the instruments needed in order to execute the steps an intruder will eventually perform during an attack. Kali is one of the best suites available to practice, learn and perform offensive techniques. On all the machines we will be running Kali Linux. The goal is understand attack methods in order to create better defenses. By creating this small environment we foster the knowledge and promote learning about different tools and techniques. Below a quick step-by-step guide on how to install and run the latest version of John the Ripper across several system using OpenMPI framework taking advantage of NFS to share common files.
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