Set NTFS permissions. in Visual Basic .NET

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Set NTFS permissions.
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4. To access the advanced settings and to set special permissions, click Advanced. 5. In the Advanced Security Settings dialog box, notice the four tabs: Permissions, Auditing, Owner, and Effective Permissions. Select the Permissions tab.
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Lesson 1: Understanding Security Permissions
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6. From the Permissions tab, the default selection is Inherit From Parent The Permis sion Entries That Apply To Child Objects. Include These With Entries Explicitly Defined Here. When this check box is selected, the file, folder, or object will inherit the permission entries from the parent folder (or object). When this selec tion is cleared, the object will not inherit the permission entries. For more infor mation about inheritance, see the Windows Help file Changing Inherited Permissions. 7. From the Permissions tab, the option to Replace Permission Entries On All Child Objects With Entries Shown Here That Apply To Child Objects is not selected. When selected, the permission entries on the child objects are reset so that they are identical to the current parent object. Click OK. Optionally, you can create share permissions at the same time that you create NTFS permissions. Simply make the appropriate changes from the Sharing tab. Keep in mind that share and NTFS permissions are independent of each other, and when you give a user NTFS permissions for a folder, that user cannot access the folder across the network unless you have also shared the folder and given the user share permissions.
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Troubleshooting NTFS Permissions
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Issues can occur with NTFS permissions just as they can with Simple File Sharing and share permissions. Assuming that all network connections are functional, all computers and hubs are working properly, and Simple File Sharing is not in use, Table 9-3 details some common problems and their solutions.
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Table 9-3
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Troubleshooting NTFS Permissions
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Cause/Solution The user can add the Read And Execute permission to the group. This gives users who access the folder the ability to execute files in the folder without add ing any other privileges.
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Scenario/Report A user reports that he applied the NTFS permissions Read and Write for the group that will access a folder. However, when a member of the group opens the folder, she cannot run the programs in it. He needs the users to be able to run the programs without giving them excess privileges. A user wants to apply NTFS permis sions, but all of the options on the Security tab under Allow are unavail able and cannot be set.
The permissions for this folder have been inherited from the parent folder. To make the permissions accessible for this file, select the This Folder Only check box in Apply Onto when setting the permis sions on the parent folder.
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9
Security and Security Permissions
Table 9-3
Troubleshooting NTFS Permissions
Cause/Solution The user has been assigned a permission of Deny by another administrator or he or she is a member of another group that has been assigned the Deny permission for the folder. The user might also have the Deny share permission. The file system used is FAT, not NTFS.
Scenario/Report Although a network user is a member of the Power Users group, and this group has the Read NTFS permissions for a folder, the user cannot read the docu ments in the folder. NTFS permissions cannot be applied because the Security tab is missing.
When Both Share and NTFS Permissions Exist
When a user is assigned multiple share permissions, the combination of the permis sions is referred to as the user s effective permissions for the share. For instance, if the share permissions that are applied to a folder are Change and Read, the user can change and read the folder s contents. Likewise, when a user is assigned multiple NTFS permissions, the user s effective permissions for a folder are the combination of all NTFS permissions. For example, if the NTFS permissions Read, Write, and Modify exist, the user can read, write to, and modify the contents of the folder. If a user is assigned both share and NTFS permissions for a folder, the user s effective permissions get a little more complicated. First, you must determine the user s effective shared permissions, and then determine the effective NTFS permissions. The final permissions on the folder are the more restrictive of the two. Here is an example: A network user, Brenda Diaz, has access to a folder that has both share and NTFS permissions applied. The share permissions are Read and Change, and the NTFS permissions are Read and Read And Execute. Thus, Brenda s cumulative share permission is Change, and her cumulative NTFS permission is Read And Execute. To calculate Brenda s effective permissions, take the more restrictive of the two, which is Read And Execute. Brenda will not be able to change any data in the folder. In all cases, if Deny is selected for a user, that user will not have access. Deny can be a share permission or an NTFS permission.
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