What are the iSCSI authentication methods?

Currently, the PowerVault Modular Disk Storage Manager has only one iSCSI authentication method. This method is called Challenge Handshake Authentication Protocol (CHAP).

CHAP is an authentication scheme used by several types of servers. CHAP validates the identity of remote clients. This authentication happens when you establish the initial link. The authentication is based on a shared secret and is bi-directional.