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I am setting a local network of windows xp and windows 7 machines, together with a NAS (Synology Diskstation DS209). And then i set up those windows machines so that the users can access the fileserver as a network drive from their "My Computer". And the weird thing is that, when i view the File Properties of any file in the NAS, the Security Tab is missing. However, when i view the local hard drive's File Properties, the Security Tab is right there!

I found some tutorial saying that, in Win XP, i can simply disable simple file sharing to restore the missing Security Tab, but this method failed. And in Windows 7, i tried to access the Local Group Policy Editor but i'm unable to make any change there.

I wonder if it is my NAS(diskstation)'s problem or Windows's problem.

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Is that true of any machine? What file system is the NAS running? – Rob Jan 31 '12 at 10:49
Yes. the filesystem is NTFS. – Biscuitz Jan 31 '12 at 11:48
One more point to add. The File Properties Security Tab is available for local hard drives. The security tab just missed in mapped drives. – Biscuitz Feb 2 '12 at 8:24

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