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ORA-28040 no matching authentication protocol (.NET 11G Client to 12C)

user563960Aug 6 2019 — edited Aug 7 2019

I have multiple .NET Apps and we want to connect to Oracle 12c using 11g client. From what I have read it is compatible.

I am getting ORA-28040 no matching authentication protocol each time I try to connect to 12c.

I read posts online about updating SQLNET.ora file (to include the items below) but does that apply to .NET or just JDBC?

SQLNET.ALLOWED_LOGON_VERSION_SERVER = 8

SQLNET.ALLOWED_LOGON_VERSION_CLIENT = 8

SQLNET.ALLOWED_LOGON_VERSION_SERVER = 8

This post has been answered by user563960 on Aug 7 2019

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Added on Aug 6 2019

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