It may be utilized on a domain-based or standalone namespace such that users will only see DFSN folders for which they have permissions. If you have existing namespaces that are in "Windows Server mode" view the properties of a namespace in the DFS Management snap-in , you will need to convert them to mode. To do so, please follow the information available here. By enabling ABE on the namespace, the DFSN service of all namespace servers will automatically enable ABE on their local namespace share and enforce the configured permissions of reparse folders automatically.
You will not be burdened with having to run cacls. Note: The 'protect' parameter is important as the reparse folders underneath the namespace shared folder will inherit permissions by default and typically not restrict access to the DFSN folders.
In the end, the permissions configured within the namespace ultimately end up on the special reparse folders found within the namespace server's share. If, at this point, you're thinking, "It's about time," you're not alone.
This access limitation is a feature of most other operating systems—a fact that played a part in Microsoft's decision to create the feature. According to Microsoft, ABE was created to solve the following problems:. ABE's base functionality is included in both Windows Server SP1 and R2; however, in order to use the feature you need to download an installer package that adds a tab to folder properties, allowing you to manage ABE.
There are three installer packages available for download, each for a different platform. To enable ABE's management capability, download the installer appropriate for your server and execute the download. During the installation process, the ABE enabler asks you if you want to enable ABE on the entire server or on a per-folder basis.
For my servers, I've enabled this feature on a per-folder basis for greater control. However, you can also selectively disable the feature on specific folders. Once installed, visit one of your shared folders and open its properties page. A new tab, appropriately named Access-based Enumeration, should be present. These options and their use are self-explanatory.
After you've implemented ABE, users won't even be able to see resources they don't have explicit permission to use. Check out the Windows Server archive , and catch up on the most recent tips from this newsletter. I mean, who wouldn't be curious if you found a share on the network named HR for Human Resources department and in this share you found a folder named Layoffs and within this folder you found a document named NextMonthsLayoffs.
Will I be one of those who will be laid off? This scenario highlights one of the weaknesses of file sharing on Windows platforms, namely that by default all users who can access a network share can, at a minimum, see what files and folders there are in that share, even if they don't have any permission to access them. Say also that within this share is a file named ThisYear. Double-click on the share and what do you see? A file named ThisYear. Try double-clicking on either of them to read the spreadsheet or browse the folder, and you get Access Is Denied.
ABE was actually first included in Service Pack 1 for Windows Server , but this service pack forms the basis of the R2 version of the platform. What ABE does is just what Windows admins have always been wishing Windows file servers would do—hide files and folders from users who don't have access to them. The result? If ABE had been available to me to use back in old NT 4 days, only senior management and HR personnel would have known about the existence of the Layoffs folder within the HR share, and no one but these personnel would have known about the existence of a document named NextMonthsLayoffs.
In other words, with ABE there wouldn't have been rumors of impending layoffs flying about—unless they were started by HR personnel or by a manager of course! This something is a component that provides a user interface both graphical and command-line that allows you to enable and configure ABE on your server.
You can download this component here from the Microsoft Download Center, but make sure you download the correct version depending upon your processor platform x86, AMD64 or IA Figure 1: Installing the ABE user interface.
The only significant decision you need to make during the install process is whether you want to automatically enable ABE retroactively on all existing shared folders on your server, or whether you prefer to configure this manually later on a per-folder basis Figure 2 :.
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