NetVision

NetVision Company Blog

A Discussion on Effective Audit of User Access

Windows File Share Permissions

Tags: , , , ,

Windows file system permissions are complicated enough without having to consider file shares.  But, we use shares because they make life easier in networked environments.  So, we need to understand how Windows file share permissions affect the effective rights that users have to files and folders.  The Security permissions tab doesn’t tell the whole story.

Sometimes, we run into scenarios where an account appears to have been granted access to appropriate groups, but when the user tries to access an important file, she is denied access.  Other times, it’s the reverse scenario. Again, users appear to have been granted appropriate group memberships, but they are actually able to access more than they should.  And of course it’s almost never obvious why we get these unexpected results.

When configuring a Windows file share, the permissions for the share are handled differently than the rights granted on the file system itself. Each share has its own ACE (Access Control Entry) that governs the permissions on the file system to which the share enables access. Since both direct assignments and share assignments have their own ACEs, Microsoft provides a simple rule on how these ACEs will work together. When both affect the same area of the file system, the most restrictive of the two permission sets has precedence. Sounds simple. But in practice, determining how direct and share permissions cause unexpected effective rights for users can be complicated and time consuming.

Complicating things further, users are sometimes directly granted permissions to a share or file system rather than having permissions assigned via group memberships. And accounts can belong to numerous groups that each has different sets of permissions. As this web of permissions is constructed from multiple sources of permission assignments, the job of determining how accounts have gained or lost access gets increasingly complicated.

NetVision takes the mystery out of Access Rights. It’s critical to be able to easily and quickly determine the effective rights to sensitive data. NetVision’s Access Rights Inspector allows users to gather file system rights information, and then display the effective rights applied to users and groups across the file system.

Instead of limiting our scope to explicit rights across a file system (ACE entries), NetVision reports on permissions acquired from all sources – explicit permissions, shares, ownership, group memberships, etc. Access Rights Inspector makes all permission settings clear and provides a quick view into the calculated effective rights saving time, reducing cost, and improving your security posture.

Tags: , , , ,

One Response to “Windows File Share Permissions”


  1. NetApp Security Audit « NetVision Company Blog
    on Sep 29th, 2009
    @ 12:24 pm

    [...] services in Active Directory.  Windows/NTFS permissions can be quite complicated.  Add the complexity of Windows shares and you’re soon looking for a way to easily report on access [...]

© 2009 NetVision Company Blog. All Rights Reserved.

This blog is powered by Wordpress and Magatheme by Bryan Helmig.