I just installed SolrCloud 5.3.x and found that the way to secure the Admin UI has changed. Apparently there is a new plugin which does role based authentication and all info on how to secure the Admin UI found on the net is outdated.
I do not need role based authentication but just simply want to put basic authentication to the Admin UI.
How do I configure SolrCloud 5.3.x in order to restrict access to the Admin UI via Basic Authentication?