Local or Bequeath Connection Fails: ORA-28040: No Matching Authentication Protocol (Doc ID 2635745.1)

Last updated on APRIL 17, 2023

Applies to:

Oracle Net Services - Version 19.5.0.0.0 and later
Information in this document applies to any platform.

Local or Bequeath client connections are intermittently failing with ORA-28040.

ORA-28040: No matching authentication protocol

This is likely a new installation or some change has taken place at the database sqlnet.ora file.

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In this Document

Symptoms

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