Administrator Guide

Congure 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
congured for the remote initiator and the target Storage Center.
About this task
NOTE: Changing CHAP settings will cause existing iSCSI connections between SAN systems using the selected fault domain to
be lost. You will need to use the Congure iSCSI Connection wizard to reestablish the lost connections after changing CHAP
settings.
Steps
1 If you are connected to a Data Collector, select a Storage Center from the drop-down list in the left navigation pane.
2 From the SYSTEM menu, select Ports.
The Ports view is displayed.
3 Click the Front End Ports tab.
4 Expand iSCSI and click the fault domain link.
The Fault Domain view is displayed.
5 On the Summary tab, click (More Actions) and select Congure CHAP.
The Congure CHAP dialog box opens.
6 Select the CHAP Enabled checkbox.
7 (Bidirectional CHAP only) In the Bidirectional CHAP Secret eld, type the shared secret that the Storage Center (target) must
provide when challenged by the remote initiator. If this eld is empty, bidirectional CHAP authentication is not enabled.
8 Dene the CHAP conguration for each server in the fault domain that initiates iSCSI connections to the Storage Center.
a Click Add.
The Add Remote CHAP Initiator dialog box opens.
b In the iSCSI Name eld, type the iSCSI name of the remote initiator.
c In the Remote CHAP Name eld, type the CHAP name of the remote initiator.
d (Bidirectional CHAP only) In the Local CHAP Secret eld, 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 eld for Local CHAP Conguration on the
Congure CHAP dialog box.
e In the Remote CHAP Secret eld, type the shared secret that the remote initiator must provide when challenged by the
Storage Center (target).
f Click OK.
The Add Remote CHAP Initiator dialog box closes.
9 Click OK.
The Congure CHAP dialog box closes.
10 Congure each remote iSCSI initiator to use the shared secrets that you dened.
Modify CHAP Settings for a Server in an iSCSI Fault Domain
Modify CHAP settings for a server to change one or more shared secrets for the server.
About this task
NOTE
: Changing CHAP settings will cause existing iSCSI connections between SAN systems using the selected fault domain to
be lost. You will need to use the Congure iSCSI Connection wizard to reestablish the lost connections after changing CHAP
settings.
Storage Center Maintenance 151