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 188.8.131.52.0 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.
To view full details, sign in with your My Oracle Support account.
Don't have a My Oracle Support account? Click to get started!
In this Document