Topics from the Microsoft SQL Server Protocols team - Netlibs, TDS, SQL Browser, etc.
In continuing with the theme of understanding error messages I'll discuss the "login failed" messages that are surfaced by the client and written to the server's error log (if the auditlevel is set to log failures on login which is the default) in the event of an error during the login process.
If the server encounters an error that prevents a login from succeeding, the client will display the following error mesage.
Msg 18456, Level 14, State 1, Server <server name>, Line 1Login failed for user '<user name>'
Note that the message is kept fairly nondescript to prevent information disclosure to unauthenticated clients. In particular, the 'State' will always be shown to be '1' regardless of the nature of the problem. To determine the true reason for the failure, the administrator can look in the server's error log where a corresponding entry will be written. An example of an entry is:
2006-02-27 00:02:00.34 Logon Error: 18456, Severity: 14, State: 8.
2006-02-27 00:02:00.34 Logon Login failed for user '<user name>'. [CLIENT: <ip address>]
2 and 5
Attempt to use a Windows login name with SQL Authentication
Login disabled and password mismatch
11 and 12
Valid login but server access failure
SQL Server service paused
Change password required
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Error: 18456, Severity: 14, State: 1.
i am having this problem with sql server 2005 in the first example of c#:
Error: 18456, Severity: 14, State: 16.
What should I do?
my email firstname.lastname@example.org
Login failed for user 'Kunal-PC\Kunal'. (.Net SqlClient Data Provider)
what can i do?
error: 18456, state 1??????????????
SQL server error: 18456 overview - This error occurs when your authentication request is been successfully accepted by SQL server named, but due to some reason SQL server is not able to grant the access to connect.
For more detail check here -
TITLE: Connect to Server
Cannot connect to PC.
Login failed for user 'sa'. (Microsoft SQL Server, Error: 18456)
For help, click: go.microsoft.com/fwlink
I need to know what I should do about my log_in failure. I turn on computer, login page appears. I hae to people: Elaine and Jo E. I cannot remember my password to the Jo E. account because I have been ill and just forgot it. But it is the Administrators account. It is very disabling to my ability to use computer. Thank you for your attention. Elaine Alsup
i use sql2012
i have this error 18456
Error Number: 18456
Line Number: 65536
I have exactly the same problem using SQL Server 2005.
email me -email@example.com
Error: 18456, Severity: 14, State: 1
Solution for me: Log off from the session and do a fresh logon to the (remote) system. looks like somekind of corruption of the SQL Server Management studio.
logon is an invalid event type error occurred in sql server 2005