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Security is also handled differently between SMB and NFS. For NFS, the authentication credentials are provided by the client or, for secure NFS, built from the UDS. User rights are determined by the NFSv3 mode bits or NFSv4 ACLs, and the UID/GIDs are used for identification purposes. There are no privileges associated with UNIX security.
For SMB, the credentials are built from the domain controller (DC) and local group database (LGDB) of the SMB server. User rights are determined by the ACL, and the SID is used for identification purposes. Windows security includes privileges such as TakeOwnership, Backup, and Restore that are granted by the LGDB or group policy object (GPO).
When configuring or managing a multiprotocol NAS environment, there are additional configuration options at the NAS-server and file-system levels that are related to how the permissions are handled between SMB and NFS users that are accessing file system data. These options are shown in Table 8.
Option | Level | Default |
Access policy | File system | Native |
UMASK (SMB) | Share | 022 |