Understanding "login failed" (Error 18456) error messages in SQL Server 2005

re: Understanding "login failed" (Error 18456) error messages in SQL Server 2005

flobi — Fri, 17 May 2013 15:59:50 GMT

What about state 1? I'm getting error 18456 state 1 (severity 14)

re: Understanding "login failed" (Error 18456) error messages in SQL Server 2005

Robert — Wed, 01 May 2013 11:47:34 GMT

I have installed sql server 2005 yesterday,after that i restored all my databases ,today i am traying to opening sql but i am unable to login with WINDOWS AUTHENTICATION and SQLSERVER AUTHENTICATION

could you please suggest me.....

Thanks

Robert

re: Understanding "login failed" (Error 18456) error messages in SQL Server 2005

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Cannot connect to NAGARAJU-PC.

===================================

A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (.Net SqlClient Data Provider)

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Error Number: 2

Severity: 20

State: 0

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Program Location:

at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)

at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj)

at System.Data.SqlClient.TdsParser.Connect(ServerInfo serverInfo, SqlInternalConnectionTds connHandler, Boolean ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity, SqlConnection owningObject)

at System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, Boolean ignoreSniOpenTimeout, Int64 timerExpire, SqlConnection owningObject)

at System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(String host, String newPassword, Boolean redirectedUserInstance, SqlConnection owningObject, SqlConnectionString connectionOptions, Int64 timerStart)

at System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance)

at System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance)

at System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection)

at System.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(DbConnection owningConnection, DbConnectionPoolGroup poolGroup)

at System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection)

at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory)

at System.Data.SqlClient.SqlConnection.Open()

at Microsoft.SqlServer.Management.UI.VSIntegration.ObjectExplorer.ObjectExplorer.ValidateConnection(UIConnectionInfo ci, IServerType server)

at Microsoft.SqlServer.Management.UI.ConnectionDlg.Connector.ConnectionThreadUser()

re: Understanding "login failed" (Error 18456) error messages in SQL Server 2005

vikash tyagi — Sun, 24 Feb 2013 14:20:22 GMT

right click on the sql server manager studio and select run as administrator becose it treat your system name as subuser of administrator

re: Understanding "login failed" (Error 18456) error messages in SQL Server 2005

Yah — Fri, 08 Feb 2013 20:06:15 GMT

LOL I just got this error message of 1. Out of the blue. No idea why this is happening . But Thank You microsoft for providing a such dog&hit error messages. Gawd I hate M$

re: Understanding "login failed" (Error 18456) error messages in SQL Server 2005

Krishantha — Thu, 07 Feb 2013 10:23:00 GMT

how to pix Error code sq l server 18456

re: Understanding "login failed" (Error 18456) error messages in SQL Server 2005

Ryan — Wed, 30 Jan 2013 20:42:07 GMT

For users with State 11 or State 12:

This will allow your Windows Login (with admin priv) to access the SQL server!

msdn.microsoft.com/.../dd207004.aspx

re: Understanding "login failed" (Error 18456) error messages in SQL Server 2005

MIchael — Mon, 26 Nov 2012 04:47:25 GMT

I have the problem in sql server 2008

error:18456

re: Understanding "login failed" (Error 18456) error messages in SQL Server 2005

dee — Fri, 09 Nov 2012 20:51:36 GMT

sql server 2005 has error 18456 severity 14 state 16 login failed for user 'NT AUTHORITY\SYSTEM' - this user has sysadm and everything else, why is there an error several times a minute? Ive checked security / roles / ... All is in place.

re: Understanding "login failed" (Error 18456) error messages in SQL Server 2005

GAURAV CHAUHAN — Thu, 08 Nov 2012 06:59:30 GMT

Dear All,

I had faced same issue in my SQL Server 2008R2 SSMS and i have fixed the same have gone through SQL logs and I have analyzed that "Issue is related to authentication".

So I have run SSMS.exe as administrator and it’s allowed me to login.

Cheer guys!!!!

Regards

Gaurav Chauhan