Error 18452 Login
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Sql Server Error 18452 Login Failed Untrusted Domain
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Error 18452 Severity 14 State 1
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SERVER - FIX ERROR - Cannot connect to . Login failed. The login is from an untrusted domain and cannot be used with Windows authentication. (Microsoft SQL Server, Error: 18452) September 6, 2012Pinal DaveSQL, SQL Server, SQL Tips and Tricks35 commentsJust a day ago, I was doing error 18452 sql server 2008 r2 small attempt to connect to my local SQL Server using IP 127.0.0.1. The IP is of sqlserver error 18452 my local machine and SQL Server is installed on the local box as well. However, whenever I try to connect to sql server error 18452 sqlstate 28000 the server it gave me following strange error.Cannot connect to 127.0.0.1. Login failed. The login is from an untrusted domain and cannot be used with Windows authentication. (Microsoft SQL Server, Error: 18452) The reason was indeed https://support.microsoft.com/en-us/kb/555332 strange as I was trying to connect from local box to local box and it said my login was from an untrusted domain. As my system is not part of any domain, this was really confusing to me. Another thing was that I have been always able to connect always using 127.0.0.1 to SQL Server and this was a bit strange to me. I started to think what did I change since it http://blog.sqlauthority.com/2012/09/06/sql-server-fix-error-cannot-connect-to-login-failed-the-login-is-from-an-untrusted-domain-and-cannot-be-used-with-windows-authentication-microsoft-sql-server-error-18452/ last time I connected to SQL Server. Suddenly I remembered that I had modified my computer's host file for some other purpose.Solution:I opened my host file and immediately added entry like 127.0.0.1 localhost. Once I added it I was able to reconnect to SQL Server as usual. The location of the host file is C:\Windows\System32\drivers\etc. You will find file with the name hosts in it, make sure to open it with notepad.If you are part of a domain and your organization is using active directory, make sure that your account is added properly to active directory as well have proper security permissions to execute the task.Reference : Pinal Dave (http://blog.SQLAuthority.com) Tags: SQL Error Messages1722Related Articles SQL SERVER - ERROR: Autogrow of file ‘MyDB_log' in database ‘MyDB' was cancelled by user or timed out after 30121 milliseconds September 14, 2015Pinal Dave SQL SERVER - SQL Server 2005 Samples and Sample Databases (February 2007) February 24, 2007Pinal Dave SQL SERVER - What is New in SQL Server Agent for Microsoft SQL Server 2005 February 26, 2007Pinal Dave 35 comments. Leave new Anonymous September 6, 2012 8:48 pmI was laughing because you put in the loop back IP as your IP. Probably you should do a IPCONFIG and put in that IP as your IP.Reply lil_kid September 11, 2012 5:35 amYou
SERVER - Fix : Error: 18452 Login failed for user ‘(null)'. The user is not associated with a trusted SQL Server connection. April 14, 2007Pinal DaveSQL, SQL Server, SQL Tips and Tricks193 http://blog.sqlauthority.com/2007/04/14/sql-server-fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/ commentsSome errors never got old. I have seen many new DBA or Developers struggling with this errors.Error: 18452 Login failed for user ‘(null)'. The user is not associated with a trusted SQL Server connection.Fix/Solution/Workaround: Change the Authentication Mode of the SQL server from "Windows Authentication Mode (Windows Authentication)" to "Mixed Mode (Windows Authentication and SQL Server error 18452 Authentication)".Run following script in SQL Analyzer to change the authenticationLOGIN sa ENABLE
GO
ALTER LOGIN sa WITH PASSWORD = '