Twenty free and effective infosec tools

We asked readers to name the free tools they find most useful in their daily work as infosec practitioners. Here are 20 that stand out.

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John the Ripper


John the Ripper is a password cracker available for many flavors of Unix, Windows, DOS, BeOS, and OpenVMS.

It's mainly used to detect weak Unix passwords. Besides several crypt(3) password hash types most commonly found on various Unix systems, supported out of the box are Windows LM hashes, plus lots of other hashes and ciphers in the community-enhanced version.

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