Dell MD3200, MD3220 manual Configuring Mutual Chap Authentication on the Storage Array

Although the storage array allows sizes from 12 to 57 characters, many initiators only support CHAP secret sizes up to 16 characters (128-bit).

NOTE: A CHAP secret is not retrievable after it is entered. Ensure that you record the secret in an accessible place. If Generate Random Secret is used, copy and paste the secret into a text file for future reference since the same CHAP secret is used to authenticate any new host servers you may add to the storage array. If you forget this CHAP secret, you must disconnect all existing hosts attached to the storage array and repeat the steps in this chapter to re-add them.

4Click OK.

Table B-4. CHAP Setting

Option	Description
None	This is the default selection. If None is the only selection, the
	storage array allows an iSCSI initiator to log on without
	supplying any type of CHAP authentication.

None and CHAP The storage array allows an iSCSI initiator to log on with or

	without CHAP authentication.
CHAP	If CHAP is selected and None is deselected, the storage array
	requires CHAP authentication before allowing access.

Configuring Mutual CHAP Authentication on the Storage Array

The initiator secret must be unique for each host server that connects to the storage array and must not be the same as the target CHAP secret.

Change the initiator authentication settings in the Change Target Authentication window. Use these options to change the settings:

•None—Select None if you permit no initiator authentication. If you select None, any initiator can access this target. Use this option only if you do not require secure data. However, you can select both None and CHAP at the same time.

•CHAP—Select CHAP if you want to enable an initiator that tries to access the target to authenticate using CHAP. Define the CHAP secret only if you want to use mutual CHAP authentication. If you select CHAP, and if no CHAP target secret is defined, an error message is displayed. Click CHAP Secret to view the Enter CHAP Secret windows. Use this window to define the CHAP secrets.

NOTE: To remove a CHAP secret, you must delete the host initiator and re-add it.

64Appendix—Manual Configuration of iSCSI