Dell Storage Manager 2020 R1 Administrator's Guide

Configure CHAP for Servers in an iSCSI Fault Domain

When Challenge Handshake Authentication Protocol (CHAP) authentication is enabled (for unidirectional CHAP only), the Storage Center (target) challenges each iSCSI initiator for a shared secret (password). Servers (remote initiators) must provide the correct shared secret to access Storage Center (target) volumes. To enable bidirectional CHAP authentication, unique shared secrets (passwords) must be configured for the remote initiator and the target Storage Center.

1. If the Dell Storage Manager Client is connected to a Data Collector, select a Storage Center from the Storage view.
2. Click the Storage tab.
3. In the Storage tab navigation pane, expand Fault Domains, then expand iSCSI and click the fault domain.
4. In the right pane, click Configure CHAP.
   The Configure CHAP dialog box opens.
5. Select the CHAP Enabled checkbox.
6. (Bidirectional CHAP only) In the Bidirectional CHAP Secret field, type the shared secret that the Storage Center (target) must provide when challenged by the remote initiator. If this field is empty, bidirectional CHAP authentication is not enabled.
7. Define the CHAP configuration for each server in the fault domain that initiates iSCSI connections to the Storage Center.
   1. Click Add.
      The Add Remote CHAP Initiator dialog box opens.
   2. In the iSCSI Name field, type the iSCSI name of the remote initiator.
   3. In the Remote CHAP Name field, type the CHAP name of the remote initiator.
   4. In the Remote CHAP Secret field, type the shared secret that the remote initiator must provide when challenged by the Storage Center (target).
   5. (Bidirectional CHAP only) In the Local CHAP Secret field, type the shared secret that the Storage Center (target) must provide when challenged by the remote initiator. This secret is required if bidirectional CHAP is enabled on the remote iSCSI initiator. This is the same shared secret that is typed into the Bidirectional CHAP Secret field for Local CHAP Configuration on the Configure CHAP dialog box.
   6. Click OK.
      The Add Remote CHAP Initiator dialog box closes.
8. Click OK.
   The Configure CHAP dialog box closes.
9. Configure each remote iSCSI initiator to use the shared secrets that you defined.