Hydra is one of the best password cracking tools. It is a centralized parallel login crack with several attack protocols. It is highly flexible, quick, reliable, and customizable for the addition of new modules.
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This tool can obtain unauthorized access remotely to a system, and that is very important for security professionals. It works with Cisco AAA, Cisco authorization, FTP, HTTPS GET/POST/PROXY, IMAP, MySQL, MSSQL, Oracle, PostgreSQL, SIP, POP3, SMTP, SSHkey, SSH, and many more.