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Dell PowerStore Configuring Multiprotocol File Sharing

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Credentials for file level security

The storage system must build a credential that is associated with the SMB or NFS request being handled to enforce file-level security. There are two kinds of credentials, Windows and UNIX. The NAS server creates UNIX and Windows credentials for the following use cases:

  • Building a UNIX credential with more than 16 groups for an NFS request. The extended credential property of the NAS server must be set to provide this ability.
  • Building a UNIX credential for an SMB request when the access policy for the file system is UNIX.
  • Building a Windows credential for an SMB request.
  • Building a Windows credential for an NFS request when the access policy for the file system is Windows.
NOTE:For an NFS request, when the extended credential property is not set, the UNIX credential from the NFS request is used. When using Kerberos authentication for an SMB request, the Windows credential of the domain user is in the Kerberos ticket of the session setup request.

A persistent credential cache is used for the following:

  • Windows credentials built for access to a file system having a Windows access policy.
  • UNIX credential for access through NFS if the extended credential option is enabled.

There is one cache instance for each NAS server.

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