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
Disclaimer: This posting is provided "AS IS" with no warranties, and confers no rights
Using Sql Studio Express to connect to a Sql Server 2005, I'm getting Error: 1846, State: 8 -- which should be password mismatch. Yet, when I use the same user name and password from a jdbc based client like Squirrel, it works fine. I have another machine where I have the login details saved where things work fine -- I am loath to try retyping the password there because if it doesn't work, then I can no longer support this system. Anyway, why might I be getting a password mismatch error when the password is correct?
J'ai un problème avec le LAN du programme docteur connectivité . J' aimerais résoudre ce problème. Pouriez -vous m'indiquer toutes les étapes qui me permettront de résoudre le problème? Je vous remercie!!!
erver Authentication. The 'sa' login details are correct but still getting the following error message:
Login failed for user 'sa'. (Microsoft SQL Server, Error: 18456)
In order to resolve the issue, please refer to the following steps:
1. Login to the MSSQL Server Management Studio with Windows Authentication.
2. In SQL Server Management Studio Object Explorer, right-click the server, and then click Properties.
3. Under the Server Properties, select a page of "Security".
4. Select the Server authentication as "SQL Server and Windows Authentication mode" and click Ok.
5. Restart the SQL Services and then try to login with 'sa' details.
Login failed for user 'sa'. Reason: Password did not match that for the login provided I installed happysql.com software to block hackers attack for brute force password. It works great. I tried to find solution but this one is only helped me to save my sql.
The most common I encounter in my case is sql authentication not enabled. This helped www.sql-server-business-intelligence.com/.../microsoft-sql-server-error-18456-login-failed-for-user
Sounds like your database server isn't configured for both NT and SQL authentication. or you can use sa user that have access over target database.
The following link has details of this error sqlserverlearner.com/.../microsoft-sql-server-error-18456
i have error 18456 in windows 7.please give me solution
Error Number: 18456
Line Number: 65536 Login failed for user
plz give me solution as soon as possible
ALTER LOGIN sa ENABLE ;
ALTER LOGIN sa WITH PASSWORD = '<enterStrongPasswordHere>' ;
I have one more reference for this <a href="www.sql-server-business-intelligence.com/.../microsoft-sql-server-error-18456-login-failed-for-user">sql error 18456</a>, check this out !!!
I go through the following link: www.sql-server-business-intelligence.com/.../microsoft-sql-server-error-18456-login-failed-for-user
as you provided in the conversation, it its going to help.
I have the vry same problem with status 16 and it appears that my DB are in recovery every 5 seconds. Why is that?
While the DB are in recovery mode they won't accept logins.
What to do?
this is an issue if you are running window 7
please right click on the icon of sql server management studio and then click on run as administrator
after that login menu appear
just choose ->
Server Type : Database Engine
Server Name: ( . ) // don't put any brackets only type single dot here (if you didn't given any user name for more information or for sql server installation just see this video tutorial)
Authentication : Windows Authentication
it could be possible you gave an instance name if you remember than put it as
type your computer name and after slash type the instance if you remember
watch this tutorial complete guide to run sql for begginers
this is part 1
and this is part 2
it will really work