Which command can be used to monitor failed login attempts on an FTP server using a display filter?

Which command can be used to monitor failed login attempts on an FTP server using a display filter?

• A. ftp.response.code == 200
• B. ftp.response.code == 500
• C. ftp.response.code == 530
• D. ftp.response.code == 401

Answer: (C)

The correct answer highlights the specific response code used by FTP servers to indicate a failed login attempt due to authentication errors. When a user attempts to log in but does not provide valid credentials, the FTP server responds with a 530 code. This status code signifies that the user was not logged in, which typically occurs when the credentials are incorrect or not provided. Being familiar with FTP response codes is crucial for monitoring and auditing server activity, especially in security contexts. The ability to filter logs or traffic for this specific response code allows network administrators or security professionals to track unauthorized access attempts effectively, thus enhancing overall security monitoring practices.

The correct answer highlights the specific response code used by FTP servers to indicate a failed login attempt due to authentication errors. When a user attempts to log in but does not provide valid credentials, the FTP server responds with a 530 code. This status code signifies that the user was not logged in, which typically occurs when the credentials are incorrect or not provided.

Being familiar with FTP response codes is crucial for monitoring and auditing server activity, especially in security contexts. The ability to filter logs or traffic for this specific response code allows network administrators or security professionals to track unauthorized access attempts effectively, thus enhancing overall security monitoring practices.