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      25.6.15 TLS Link Encryption for NDB Cluster
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      <a href="mysql-cluster-tls-overview.html">
       25.6.15.1 Overview of TLS for NDB Cluster
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       25.6.15.2 Creating a CA and Keys
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      <a href="mysql-cluster-tls-using.html">
       25.6.15.3 Using TLS Connections
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  <p>
   This section discusses the implementation and use of Transport
      Layer Security (TLS) to secure network communications in MySQL NDB
      Cluster. Topics covered include keys and certificates, key and
      certificate life cycles, authentication of certificates, and how
      these are reflected in the configuration of the cluster, as well
      as NDB Cluster support for the Internet Public Key Infrastructure
      (PKI) used to authenticate and encrypt connections between NDB
      nodes, and between the NDB management server and its clients.
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    Note
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    TLS for NDB Cluster on Linux requires compiled-in support for
        OpenSSL 1.1 or later. For this reason, it is not available for
        Enterprise Linux 7, which is built with OpenSSL 1.0.
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