Home » RDBMS Server » Enterprise Manager » ORA-12638
ORA-12638 [message #68375] Wed, 02 July 2003 00:38 Go to next message
Andrew
Messages: 144
Registered: March 1999
Senior Member
Then I Create DB appears error ORA-12638:
Credential retrieval failed.
Error appears not dependent from that where i create DB:
by script or by DB Configuration Assitant
Re: ORA-12638 [message #68720 is a reply to message #68375] Wed, 28 July 2004 13:06 Go to previous messageGo to next message
Frank Naude
Messages: 4502
Registered: April 1998
Senior Member
Hi,

Outcomment or set the following parameter to NONE in your "sqlnet.ora" file:

# SQLNET.AUTHENTICATION_SERVICES= (NTS)


Best regards.

Frank
Re: ORA-12638 [message #68919 is a reply to message #68720] Mon, 07 February 2005 01:16 Go to previous messageGo to next message
megart
Messages: 1
Registered: February 2005
Junior Member
Hi,
this correction helps me
to resolve some other problems
related with ASP and oricle
connection.

Thank you muchly

Мю
Re: ORA-12638 [message #117283 is a reply to message #68375] Tue, 26 April 2005 05:14 Go to previous messageGo to next message
Thomf
Messages: 4
Registered: April 2005
Location: Paris, France
Junior Member
Hi,

I did the same on a custom PC but it did not solve anything.
So, my question is: do I have to do it on sqlnet.ora server
file instead of custom file.

Thanks for your answer.

Thomas
Re: ORA-12638 [message #117587 is a reply to message #68375] Thu, 28 April 2005 06:53 Go to previous messageGo to next message
girish.rohini
Messages: 744
Registered: April 2005
Location: Delhi (India)
Senior Member
Yes

This has to be done in sqlnet.ora on the server.
icon5.gif  Re: ORA-12638 [message #118770 is a reply to message #68375] Sun, 08 May 2005 07:28 Go to previous messageGo to next message
Flexsurferone
Messages: 1
Registered: May 2005
Junior Member
I was having the same issue, & solved by changing the parameter

SQLNET.AUTHENTICATION_SERVICES into (none).

thx to every one!!

but can some one explain whats this service about & what NTS means?

i'll be very thankfull for the information
Re: ORA-12638 [message #118900 is a reply to message #117283] Mon, 09 May 2005 10:50 Go to previous messageGo to next message
Thomf
Messages: 4
Registered: April 2005
Location: Paris, France
Junior Member
Thanks for your answers,

This solved my problem: ora-12638 disappear suddenly.

Thomas Cool
Re: ORA-12638 [message #171712 is a reply to message #68375] Thu, 11 May 2006 03:42 Go to previous messageGo to next message
akr54
Messages: 1
Registered: May 2006
Location: FRANCE
Junior Member
You may change your "SQLNET.ORA" file with both :

SQLNET.AUTHENTICATION_SERVICES= (NONE,NTS)

And thanks for your answers that solved my problem too.

AK from FRANCE
icon14.gif  Re: ORA-12638 [message #188466 is a reply to message #68375] Fri, 18 August 2006 12:48 Go to previous messageGo to next message
hrishi.kamat
Messages: 1
Registered: August 2006
Junior Member
Thanks guys you have been really help to the needful.
icon8.gif  Re: ORA-12638 [message #211375 is a reply to message #188466] Thu, 28 December 2006 04:38 Go to previous messageGo to next message
zmarak
Messages: 4
Registered: December 2006
Location: Kabul, Afghanistan
Junior Member

Well Guys, I'm not that much expert guy in Oracle, but from what can make out the NTS (Network Telephony Services)makes the Oracle client attempt to use your current Windows domain credentials to authenticate you with the Oracle server. This could fail for a couple of reasons:

- The Oracle server is not configured to support Windows authentication
- The credentials you use to login to your local machine are not sufficient to allow you to login to the server.

In my case, our Network Administrator had changed the password OS user, while rebooting the system, the Oracle popped up with the Credential Failure.

Replacing the line:

SQLNET.AUTHENTICATION_SERVICES= (NTS)

with

SQLNET.AUTHENTICATION_SERVICES= (NONE)

in sqlnet.ora resolved the issue by disabling local support for authenticating using Windows credentials.

icon14.gif  Re: ORA-12638 [message #211391 is a reply to message #118770] Thu, 28 December 2006 06:30 Go to previous messageGo to next message
zmarak
Messages: 4
Registered: December 2006
Location: Kabul, Afghanistan
Junior Member

The NTS (Network Telephony Services)makes the Oracle client attempt to use your current Windows domain credentials to authenticate you with the Oracle server. This could fail for a couple of reasons:

- The Oracle server is not configured to support Windows authentication
- The credentials you use to login to your local machine are not sufficient to allow you to login to the server.

In my case, our Network Administrator had changed the password OS user, while rebooting the system, the Oracle popped up with the Credential Failure.

Replacing the line:

SQLNET.AUTHENTICATION_SERVICES= (NTS)

with

SQLNET.AUTHENTICATION_SERVICES= (NONE)

in sqlnet.ora resolved the issue by disabling local support for authenticating using Windows credentials.
Warm rgds/Zmarak
Re: ORA-12638 [message #212376 is a reply to message #211391] Fri, 05 January 2007 00:52 Go to previous messageGo to next message
amit_p_dixit
Messages: 31
Registered: November 2006
Location: Mumbai
Member

Thanx buddy...
i had the same prob.... ur solution helped me out..


Amit
icon12.gif  Re: ORA-12638 [message #218951 is a reply to message #68375] Mon, 12 February 2007 03:46 Go to previous messageGo to next message
leevun
Messages: 3
Registered: February 2007
Location: Belgium - Ghent
Junior Member
Another option is ORA-12638 happens when you haven't rebooted your system. You need to enter the windows authentication again in order to have full access again to the database. Perhaps the oracle version is reinstalled.

So just reboot and login to your windows!

Lieven
Re: ORA-12638 [message #304586 is a reply to message #218951] Wed, 05 March 2008 13:48 Go to previous messageGo to next message
jplanaro
Messages: 1
Registered: August 2006
Location: Brazil
Junior Member
Hi, I am facing this problem between 2 instances in different servers.
I have to use SQLNET.AUTHENTICATION_SERVICES= (NTS) because we use windows (AD) authentication.

Does anybody know something about it ?

Thanks in advance

Joao
Re: ORA-12638 [message #309933 is a reply to message #304586] Sun, 30 March 2008 02:24 Go to previous message
Mohammad Taj
Messages: 2412
Registered: September 2006
Location: Dubai, UAE
Senior Member

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