![]() ![]() In the example above, these changes will prevent the user from: This could be achieved by using C: OICIIO (object-inherit, container-inherit, inherit-only), and RWX to the top-level directory, ensuring that a recursive copy/delete operation is performed, which does check access control, and re-inherit permissions in the target.įor example, a user has access to both A and B, with the placeholders secured for read-only: As part of a move (drag/drop, cut/paste), if users have the Delete right to the source directory object and a same-named target folder doesn't already exist, NTFS will re-link the directory to the new parent regardless of permissions on the source subfolders and files. Removing Delete from the top-level directory - part of Change, which general practice is to give users - typically this folder, subfolders and files.Prevent users from performing NTFS re-link moves within a volume on top-level directories by: The file should have the hidden attribute set, eg ‘ placeholder.txt’ This file will be processed first due to the name beginning with a space (0x20 – processed first in tests), and explorer will immediately return an access denied message. Creating a placeholder file within each top-level directory, with users having read-only access to the file.Prevent a move operation completed as a copy/delete on top-level folders by: However, these solutions generally require too much effort, so I've come up with the following relatively simple workaround: Develop a DropHandler for Directory/Folder objects to filter requests.Develop a WH_GETMESSAGE hook to intercept explorer drag-and-drop messages and cancel them before the request gets to the server.Develop a filesystem mini-filter that sits at an altitude to interpret file system operations that are the result of a drag and drop request, and deny requests that involve too much change (or the top 3 levels of each top-level directory for example). ![]()
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