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Namenode UI (HDFSUI) through knox has only 1 of six tabs working (HA cluster)

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Explorer

Howdy guys, I have visibility of several webui's Ranger, Atlas and WebHDFS.

The cluster is Kerberized and has HA on the NameNode (Ambari-2.4.2 + HDP-2.5.3)

There is a firewall between knox and both the namenodes and my declaration.

<gateway>
...
<!-- required for HA -->
<provider>
<role>ha</role>
<name>HaProvider</name>
<enabled>true</enabled>
<param name="WEBHDFS" value="maxFailoverAttempts=3;failoverSleep=1000;maxRetryAttempts=300;retrySleep=1000;enabled=true" /> </provider>
</gateway>
<service>
<role>WEBHDFS</role>
<url>http://ACTIVENN:50070/webhdfs</url>
<url>http://STANDBYNN:50070/webhdfs</url>
</service>
<service>
<role>HDFSUI</role>
<url>http://ACTIVENN:50070</url>
</service>
<service>
<role>NAMENODE</role>
<url>hdfs://ha-name-for-cluster</url>
</service>

Note: The log page on the last tabs says "unauthorized dr.who 403"

I noticed a similar problem here:

What are the reasons why there might be missing tab data?

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