Hrishikesh Gadre created SOLR-9541:

             Summary: Support configurable authentication mechanism for 
internode communication
                 Key: SOLR-9541
             Project: Solr
          Issue Type: Improvement
      Security Level: Public (Default Security Level. Issues are Public)
    Affects Versions: 6.0, 5.3
            Reporter: Hrishikesh Gadre

SOLR-7849 introduced PKI based authentication mechanism for internode 
communication. The main reason for this feature (as per SOLR-7849) is,

>> Relying on every Authentication plugin to secure the internode communication 
>> is error prone. 

At Cloudera we are using Kerberos protocol for all communication without any 
issues (i.e. between client/server as well as server/server). We should make 
this internode authentication mechanism configurable (with default as PKI based 
mechanism). This will allow users to decide the appropriate mechanism based on 
their security requirements.

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