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CONTAP-667475: ONTAP Security settings negotiate TLSv1.2 unexpectedly when TLSv1.3 is confirgued

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Category:
ontap-9
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core
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Issue

  • Cluster peering or cross-cluster operations may negotiate TLSv1.2 unexpectedly.
  • Environments that only allow TLSv1.3 (or require specific TLSv1.3 suites) may experience connection issues.
  • The issue occurs when using:

security config modify
(or equivalent REST/automation) to update cipher suites without explicitly including any TLSv1.3 cipher suites in the configured list. In that situation, the system can behave as though no TLSv1.3 suites are enabled for XC RPC, resulting in fall back to TLSv1.2.
  • Seeing TLSv1.3 suites in:
    security config show
    does not guarantee you are not affected, because displayed suites may not reflect what XC configuration ultimately received/used.

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