This is what helped me:
https://gist.github.com/jankronquist/6412839
-Original Message-
From: Kostas [mailto:k...@dataverse.gr]
Sent: Tuesday, July 26, 2016 3:22 PM
To: solr-user@lucene.apache.org
Subject: solr-6.1.0 - Using different client and server certificates for
authentication
Hello.
I have setup Solr 6.1.0 to use SSL (on Windows) and to do client
authentication based on the client certificate.
When I use the same certificate for both the server and the client
authentication, everything works OK :
