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https://issues.apache.org/jira/browse/FLINK-9310?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Till Rohrmann closed FLINK-9310.
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Resolution: Fixed
Release Note: 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. (was: 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.)
> Update default cyphersuites
> ---------------------------
>
> Key: FLINK-9310
> URL: https://issues.apache.org/jira/browse/FLINK-9310
> Project: Flink
> Issue Type: Task
> Components: Security
> Affects Versions: 1.4.2
> Reporter: Stephan Ewen
> Assignee: Stephan Ewen
> Priority: Major
> Fix For: 1.5.0
>
>
> 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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