Houston Putman created SOLR-16963:
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             Summary: Conflicting SSL options for Http2SolrClient TLS
                 Key: SOLR-16963
                 URL: https://issues.apache.org/jira/browse/SOLR-16963
             Project: Solr
          Issue Type: Bug
      Security Level: Public (Default Security Level. Issues are Public)
          Components: http2, SolrJ
    Affects Versions: 8.4.1
            Reporter: Houston Putman


Since [SOLR-14163|https://github.com/apache/lucene-solr/pull/1147/files#top], 
the {{solr.jetty.ssl.verifyClientHostName}} and {{solr.ssl.checkPeerName}} 
options have done the exact same thing in the {{{}Http2SolrClient{}}}, which is 
control the {{{}EndpointIdentificationAlgorithm{}}}. 

Since {{solr.jetty.ssl.verifyClientHostName}} is checked second, that is 
actually the setting that is used to determine the 
{{{}EndpointIdentificationAlgorithm{}}}, so {{solr.ssl.checkPeerName}} is 
actually ignored.

Going forward I suggest that we stop our use of 
{{{}solr.jetty.ssl.verifyClientHostname{}}}, because it was added after 
{{solr.ssl.checkPeerName}} and its name is less correct. The 
endpointIdentificationAlgorithm doesn't do any verification of the client's 
hostname. That's a mTLS option, and is server-side.



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