Medusa is an open source tool used to test the penetration of authentication systems through brute force attacks. It supports many protocols and services such as SSH, FTP, HTTP, MySQL, RDP, SMB, and others. It is characterized by its high speed and the ability to perform multiple attacks simultaneously, making it a powerful tool for security testers and attackers alike. The potential harms of this tool are that it may be used to hack weak accounts with easy passwords, which leads to unauthorized access to systems. It can also cause server resources to be consumed when performing repeated attacks, which may lead to service disruption. In addition, it can be used to target administrative accounts, which allows complete control over the system. To protect against these risks, it is recommended to enable login restrictions through tools such as fail2ban to block IP addresses after a certain number of failed attempts. It is also necessary to use two-factor authentication (2FA) to add an additional layer of security to accounts, in addition to using strong and long passwords that are difficult to guess. It is also preferable to enable continuous verification of security logs to monitor any suspicious login attempts and take appropriate action immediately.

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