Windows Server Security: Pro tips (2) : NTFS Permissions:
Reviewing and tightening NTFS permissions is a critical step in ensuring server security, preventing unauthorized access, and maintaining compliance with security best practices.
NTFS Permissions: Ensure Proper Permissions on System Drives
Legacy Server OS (prior to Windows Server 2016):
To enhance security, review NTFS permissions via Computer Management > Disk Management.
Remove the Everyone group from having Full Control on system drives, as this default setting can create security vulnerabilities.
Windows Server 2016 and Later:
By default, Authenticated Users may have Read/Execute access on system drives. Review these permissions and remove broad or unnecessary groups, such as Everyone, to strengthen security.
Even though Microsoft has made NTFS defaults more restrictive, it’s still essential to:
o Remove access for general users or groups not involved in system or database operations.
o Limit permissions to service accounts and administrators that require them.
By diligently managing NTFS permissions, you can significantly bolster your server's security. Regularly reviewing and updating these permissions ensures that only the necessary users and groups have access, reducing the risk of unauthorized access and maintaining a robust security posture of your server. Always prioritize a principle of "Least Privileged Acccess" to keep your systems secure and compliant.