Re: ORA-12640: Authentication adapter initialization failed

From: Frank van Bortel <>
Date: Tue, 12 Feb 2008 20:03:31 +0100
Message-ID: <bcae6$47b1ed83$524b5c40$> wrote:
> There are multiple oracle applications in this environment, so I can't
> change the sqlnet.ora file. Right now it has a line that says:

12640, 00000, "Authentication adapter initialization failed"

// *Cause:  The function specified in the authentication table entry for the
//          service failed.
// *Action: Enable tracing to determine the exact error.

My guess is one of these services is not (correctly) installed. And I must say, I have never seen such a mess - do you not have a corporate guideline that specifies *which* protocol is used?

NTS: Ultimately based on Kerberos, so why both? Where does TCPS come in? Do you encrypt your SQL*Net based traffic?
Kerberos is Advanced Security, NTS is basic.

Using an account with password requires Advanced Security to be bypassed (switched off). Setting
SQLNET.AUTHENTICATION_SERVICES=NONE does just that. Do you want to log on with user/password? Your configuration does not tell that - it tells a different story; one of external authentication. In order to allow for that, you must log on, and so must your third party app.


Frank van Bortel

Top-posting in UseNet newsgroups is one way to shut me up
Received on Tue Feb 12 2008 - 13:03:31 CST

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