Microsoft Initiator Chap Secret Restrictions; Linux Chap Restrictions; Atto Macintosh Chap Restrictions; Recommended Chap Policies - HP StorageWorks MPX200 User Manual

• Maximum length of 100 characters
• Minimum length of 1 character

Microsoft initiator CHAP secret restrictions

The Microsoft initiator CHAP secret restrictions are:
• Maximum length of 16 characters
• Minimum length of 12 characters
• When an initiator uses iSNS for target discovery, only normal session CHAP applies
NOTE:
There is no restriction on the type of characters that can be entered.

Linux CHAP restrictions

The Linux CHAP restrictions are:
• CHAP is supported with the Linux open-iscsi initiator and MPX200.
• CHAP setup with Linux iSCSI initiator is not supported with the MPX200.

ATTO Macintosh CHAP restrictions

The ATTO Macintosh iSCSI initiator does not support CHAP at this time.

Recommended CHAP policies

The following CHAP policies are recommended:
• The same CHAP secret should not be configured for authentication of multiple initiators or targets.
• Any CHAP secret used for initiator authentication must not be configured for authentication of any
target. Any CHAP secret used for target authentication must not be configured for authentication
of any initiator.
• CHAP should be configured after the initial iSCSI initiator/target login to validate initiator/target
connectivity. The first initiator/target login creates a discovered iSCSI initiator entry on the MPX200
that is used in the CHAP setup.

iSCSI session types

iSCSI defines two types of sessions:
• Discovery—SCSI discovery enables an initiator to find the targets to which it has access.
• Normal—A normal session is unrestricted.
CHAP is enforced on both discovery and normal sessions.

MPX200 CHAP modes

The MPX200 supports two CHAP modes. Once CHAP is enabled, it is enforced for both discovery
sessions and normal sessions. You can choose only the CHAP mode:
106 MPX200 iSCSI configuration rules and guidelines