Hadoop Security Guide
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Enabling SPNEGO Authentication for Hadoop

By default, access to the HTTP-based services and UIs for the cluster are not configured to require authentication. Kerberos authentication can be configured for the Web UIs for HDFS, YARN, MapReduce2, HBase, Oozie, Falcon, and Storm. SPNEGO authentication for HBase Web UIs is only available in HDP 2.5 and later.