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File Access and Protocols Feature Guide 11

OceanStor 18500 V3 and 18800 V3 Mission Critical Storage System V300R003

This document describes the implementation principles and application scenarios of the NAS feature. Also, it explains how to configure and manage NAS.
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What Is the Priority of Share Authentication When a Client Is Included in Multiple Share Permissions?

What Is the Priority of Share Authentication When a Client Is Included in Multiple Share Permissions?

Question

When a client is included in multiple share permissions, what is the priority of its share authentication?

For example, if a NFS share of a file system is exported and two NFS share permissions are configured:

  1. Use network group my_netgroup:rw (read-write) to configure. This network group contains the client whose IP address is A.A.A.A.
  2. Use IP network A.A.0.0:ro (read-only) to configure.

When a client with IP address A.A.A.A mounts the NFS share, what is its permission?

Answer

Its permission is allocated based on the following priority from high to low: host name > IP address > IP network > wildcard > network group > * (anonymous). In the previous example, the share permission of the client matches that of IP network A.A.0.0:ro which is read-only. Therefore, the client has the read-only permission. In addition, if multiple permissions of the same priority are matched, use the latest permission that is configured.

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Updated: 2018-07-19

Document ID: EDOC1000084098

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