Dell PowerVault MD3260i Bedienungsanleitung PDF herunterladen (Seite 36)

Target CHAP

In target CHAP, the storage array authenticates all requests for access issued by the iSCSI initiator(s) on the host server

using a CHAP secret. To set up target CHAP authentication, you must enter a CHAP secret on the storage array, then

configure each iSCSI initiator on the host server to send that secret each time it attempts to access the storage array.

Mutual CHAP

In addition to setting up target CHAP, you can set up mutual CHAP in which both the storage array and the iSCSI initiator

authenticate each other. To set up mutual CHAP, configure the iSCSI initiator with a CHAP secret that the storage array

must send to the host sever in order to establish a connection. In this two-way authentication process, both the host

server and the storage array send information that the other must validate before a connection is allowed.

CHAP is an optional feature and is not required to use iSCSI. However, if you do not configure CHAP authentication, any

host server connected to the same IP network as the storage array can read from and write to the storage array.

NOTE: When using CHAP authentication, you should configure it on both the storage array (using MD Storage

Manager) and the host server (using the iSCSI initiator) before preparing virtual disks to receive data. If you

prepare disks to receive data before you configure CHAP authentication, you lose visibility to the disks once CHAP

is configured.

CHAP Definitions

To summarize the differences between target CHAP and mutual CHAP authentication, see the following table.

CHAP Type Description

Target CHAP Sets up accounts that iSCSI initiators use to connect to

the target storage array. The target storage array then

authenticates the iSCSI initiator.

Mutual CHAP Applied in addition to target CHAP, mutual CHAP sets up

an account that a target storage array uses to connect to

an iSCSI initiator. The iSCSI initiator then authenticates

the target.

Step 5: Configure CHAP Authentication On The Storage Array

(Optional)

If you are not configuring any type of CHAP, skip these steps and go to Step 7: Connect To The Target Storage Array

From The Host Server.

NOTE: If you choose to configure mutual CHAP authentication, you must first configure target CHAP.

In terms of iSCSI configuration, the term Target always refers to the storage array.

Configuring Target CHAP Authentication On The Storage Array

1. From MD Storage Manager, click the iSCSI tab and then click Change Target Authentication.

Select one of the CHAP settings described in the following table.

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Dell PowerVault MD3260i Bedienungsanleitung Seite 36