getnpusers.py

Enumerate users with Kerberos pre-authentication disabled (default anonymous enumeration)

$ GetNPUsers.py [domain]/ -usersfile [path/to/userslist] -dc-ip [domain_controller_ip]

$ GetNPUsers.py [domain]/ -usersfile [path/to/userslist] -dc-ip [domain_controller_ip] -request

$ GetNPUsers.py [domain]/[username]:[password] -usersfile [path/to/userslist] -dc-ip [domain_controller_ip]

$ GetNPUsers.py [domain]/[username] -hashes [LM_Hash]:[NT_Hash] -usersfile [path/to/userslist] -dc-ip [domain_controller_ip]

$ GetNPUsers.py [domain]/ -usersfile [path/to/userslist] -dc-ip [domain_controller_ip] -request > [path/to/output.txt]

./getnpusers.py

-h, --help
    Show help message and exit.

The `getnpusers.py` command (assumed to be a custom script) identifies and lists users on a Linux system who do not have access to mail. This likely involves checking the user database (e.g., `/etc/passwd`, `/etc/shadow`) and comparing it against mail server configuration or mail spool directories. The script probably iterates through the users, determines if a mailbox exists or if mail services are configured for them, and then prints the usernames of those lacking mail access.

This can be useful for system administrators who want to identify inactive or potentially misconfigured accounts. It helps in auditing user access and ensuring proper system resource allocation. The script's internal workings would involve file parsing, string manipulation, and potentially interacting with other system utilities. Its design could be enhanced by adding flags for output formatting, exporting to file, and exception management. The script would be a part of an overall suite of system admin tools to ease system management, especially in large environments.

The script relies on its own internal methods for determining mail access, which may not be fully accurate across all mail server configurations. False negatives or false positives are possible. The script's accuracy is also dependent on appropriate user permission to access the correct files and directories.

The script requires Python to be installed on the system. It might also require specific Python modules, like `os`, `sys`, or others, based on its implementation. Check the script's code for a complete list.

Ensure the script is executed with appropriate permissions to access user information. Avoid storing sensitive data, such as passwords, directly in the script. Input sanitization might be required when reading user configurations to avoid exploits. Limit access to script to authorized users.

The script may have configuration options set within the script itself (e.g., paths to user databases, mail spool directories). These might need to be adjusted based on the specific system configuration.

Given the `.py` extension, this script is likely written in Python. It was most probably developed to address a specific need for user management in a Linux environment, such as identifying users who do not have access to a mail system. Its use is limited to systems where the script is available and executable. The history of the script is dependent on the author/maintainer and would usually be maintained in the script's version control history or release notes.

cut(1), grep(1), awk(1), adduser(8), userdel(8)