> # iSLB Session Authentication

> The IPS module and MPS-14/2 module support the iSLB authentication mechanism to authenticate iSLB hosts that request access to storage. By default, the IPS module and MPS-14/2 module allow CHAP or None authentication of iSCSI initiators. If authentication is always used, you must configure the switch to allow only CHAP authentication.

> For CHAP user name or secret validation you can use any method supported and allowed by the Cisco MDS AAA infrastructure (see the Security Configuration Guide, Cisco DCNM for SAN for more information). AAA authentication supports RADIUS, TACACS+, or a local authentication device.

> Note Specifying the iSLB session authentication is the same as for iSCSI. See the "iSCSI Session Authentication" topic.

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