What "unmapped user access" for NFS share in Windows Server 2008 R2?

In the beginning, I followed this Youtube video to set up an NFS share in Windows Server 2008 R2:

https://www.YouTube.com/watch?v=BQ8Q_vsiksg

Please note that the default option to allow to access Unix unmapped user is not changed (to about 1 min 57 sec).

Then I found another article at http://www.vmwarearena.com/2012/07/create-nfs-datastore-for-esx-in-windows.html

But in this article, I like to select allow anonymous access (instead of allow access Unix unmapped user).

So who is correct?  Or both are correct (which means that this 'unmapped user access' is not serious)?

And why should we have to allow root access (in the NFS share permissions dialog box)?  What a security risk?

Thanks in advance.

Have you tried to run through the steps taken from the blog of VMware?

How to enable NFS on Windows 2008 and currently at ESX | Insider - Articles from VMware VMware support

Also, there are 3 KB articles to know in case of potential problems

1. http://kb.vmware.com/kb/1004490

2. http://kb.vmware.com/kb/1003967

3. http://technet.microsoft.com/en-us/library/cc753302 (WS.10) .aspx

Noting in particular this section

Share the folder of Windows for NFS

To share the folder of Windows for NFS:

  1. Right click on the local folder you want to share via NFS.
  2. Click NFS share.
  3. Type the name for the share. For example, NFS-VMFS01.
  4. Delete to allow anonymous access.
  5. Click on permissions.
  6. Change the type of access in reading + writing and select allow root Access.

Tags: VMware

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