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Vserver : Configuration > Protocols > NFS : Understanding NFS : NFS concepts
NFS concepts
NFS clients can access your storage system using the NFS protocol provided Data ONTAP can properly authenticate the user.
When an NFS client connects to the Vserver, Data ONTAP obtains the UNIX credentials for the user by checking different name services, depending on the name services configuration of the Vserver. The options are local UNIX accounts, NIS domains, and LDAP domains. You must configure at least one of them so Data ONTAP can successfully authorize the user. You can specify multiple name services and the order in which they are searched.
In a pure NFS environment with UNIX volume security styles, this configuration is sufficient to authenticate a user connecting from an NFS client and provide the proper file access.
If you are using mixed or NTFS volume security styles, Data ONTAP must obtain a CIFS user name for the UNIX user for authentication with a Windows domain controller. This can happen either by mapping individual users using local UNIX accounts or LDAP domains, or by using a default CIFS user instead. You can specify for the Vserver which name services are searched in which order, or specify a default CIFS user.

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