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  1. Flink
  2. FLINK-9310

Update default cyphersuites

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    Details

    • Type: Task
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 1.4.2
    • Fix Version/s: 1.5.0
    • Component/s: Runtime / Coordination
    • Labels:
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    • Release Note:
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      Due to a limitation in Netty's SsLHandler (v4.0.27), it does not work well together with GCM enabled cypher suites. It can cause transmission failures between Flink TaskManager's which manifest in a LocalTransportException. Therefore, it is highly recommended to set the {{security.ssl.algorithms}} configuration to TLS_RSA_WITH_AES_128_CBC_SHA when enabling ssl encryption between TaskManagers.
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      Due to a limitation in Netty's SsLHandler (v4.0.27), it does not work well together with GCM enabled cypher suites. It can cause transmission failures between Flink TaskManager's which manifest in a LocalTransportException. Therefore, it is highly recommended to set the {{security.ssl.algorithms}} configuration to TLS_RSA_WITH_AES_128_CBC_SHA when enabling ssl encryption between TaskManagers.

      Description

      The current default cipher suite TLS_RSA_WITH_AES_128_CBC_SHA is no longer recommended.

      RFC 7525 [1] recommends to use the following cipher suites only:

      • TLS_DHE_RSA_WITH_AES_128_GCM_SHA256
      • TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
      • TLS_DHE_RSA_WITH_AES_256_GCM_SHA384
      • TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384

      [1] https://tools.ietf.org/html/rfc7525

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              • Assignee:
                sewen Stephan Ewen
                Reporter:
                sewen Stephan Ewen
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                  Updated:
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