Login Failed For User '(null)' Error When Trying To Use Windows Authentication
Feb 6, 2006
I'm working on an ASP.NET project, and we're attempting to switch from SQL Server authentication to Windows authentication to connect to the database.
It works fine locally when I debug in Visual Studio, but when it hits the web server, I get the error: "Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection."
IIS has anonymous access disabled, and Integrated Windows Authentication is checked. The web.config file has:
The database I'm attempting to access is on a different machine than IIS, and the connection string doesn't contain a username or password, and has "Trusted_Connection=Yes", and "Integrated Security=SSPI".
From what I've been able to find online, I'm guessing the problem is due to IIS and SQL Server residing on different machines, but I'm not sure how to fix it.
Hi-- I am building an intRAnet website using windows authentication for website access and SQL Server access ( Trusted_Connection = true ). In IIS I have these settings:
Allow Anonymous = unchecked (false) Windows Authentication = Checked (true) Digest windows = checked (true) In my Web.Config file:
authentication="windows" impersonate="true" allowusers="*" When I pull up the page these are my credentials: Security.Principal.Windows: mydomainmyuserid (this is correct what it shows on my page) Me.User.Identity: mydomainmyuserid (this is correct what it shows on my page) Threading.currentThread.currentUser mydomainmyuserid (this is correct what it shows on my page)
So the ASP.NET page recognizes it is me and my domain. However, when i click a button to pull some data from a database I get the error message: Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection. My data access on SQL Server works fine. The weird thing is when I debug on my machine it pulls data fine. but when I copy the files to the windows 2003 server it doesn't work. Do i have to do something with delegation?
We are looking at developing an SQL Server 2005 Database and I would like to use Windows Authentication rather than SQL Server Authentication to connect our client app.
In our development environment, we have two Servers, one being used as a file server and the other as an SQL Server. We have now set up a domain using the file server as the domain controller. (We had previously been set up to use a workgroup).
I have set up an active directory group called SqlDevelopers and added an active directory user called Jonathan to it.
On the SQL Sever, in management studio, I have set up a new server login which uses windows authentication called DomainSqlDevelopers. I used the GUI to verify I could see the domain and the group.
The default database is set to a test database on the server. A user in the test database is mapped to the DomainSqlDevelopers and given the Roles dbo, db_datareader, db_datawriter.
To test the log in, on the server, I logged out as administrator and in as Jonathan. I could successfully access the server through management studio using windows authentication.
However, if I log in as Jonathan on my client PC and try to access the SQL Server using management studio and windows authentication, I have problems.
The first time I try I will get a timeout error. If I try again will get either:
Login failed for user ''. The user is not associated with a trusted SQL Server connection
Or
Cannot generate SSPI context
I can€™t determine any pattern to which of the above errors I get.
However, if I log in as administrator on my client PC, I can connect to the server using management studio and windows authentication.
Sounds like Active Directory/Domain or other Network issue (Not really my area). I would be grateful for any help.
Hello everyone. I'm very new to asp.net. I've been coding in vb.net for a while now (getting my associates degree in desktop application programming) and my boss wants all of my new applications to be web based now. Well, i decided to take some initiative on this and begin a new project for my department. This is a very small project. So far, everything is coming along alright (i found an eBook that's helped me quite a bit). Everything was cool until yesterday when i tried to connect to our sql server database. I get an error message stating:
Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection.
Because i'm testing this on my system as well as the remote system which hosts the application, i can see the error message on the remote system. Here is the error it's giving me:
Server Error in '/' Application. --------------------------------------------------------------------------------
Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Data.SqlClient.SqlException: Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection.
Source Error:
Line 57: sConnString = "Server=F11602A2120564OPS;Initial Catalog=OpsMonitor;User ID='public';Password=;Integrated Security=SSPI;"'Connection String Line 58: sConn = New SqlConnection(sConnString)'Initialize New Connection Line 59: sConn.Open'Open the connection Line 60: End Sub Line 61: </script>
[SqlException: Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection.] System.Data.SqlClient.ConnectionPool.GetConnection(Boolean& isInTransaction) +474 System.Data.SqlClient.SqlConnectionPoolManager.GetPooledConnection(SqlConnectionString options, Boolean& isInTransaction) +372 System.Data.SqlClient.SqlConnection.Open() +383 ASP.atm_reporting_aspx.OpenConn() in c:inetpubwwwrootatm_reporting.aspx:59 ASP.atm_reporting_aspx.Page_Load(Object Src, EventArgs E) in c:inetpubwwwrootatm_reporting.aspx:23 System.Web.UI.Control.OnLoad(EventArgs e) +67 System.Web.UI.Control.LoadRecursive() +35 System.Web.UI.Page.ProcessRequestMain() +731
You can see my SQL Connection string in there as well. Can someone please help me with this? I can post the code to the entire page as well if that would help. I'm developing this with Dreamweaver MX 2004 (i like dreamweaver MUCH better than visual studio, especially for web design/development). Thanks,
i'm using the Enterpirse library logger to write logs into a database. When choosing connection string i choose the database i want in the "connection properties" dialog box and push 'Test connection' button. everything goes well.
then i open the SQL Server Management studio express and connect to the databse to check some things, from that point on , when i push the 'Test Connection' button in the Enterprise library i get the error:
"cannot open user default database. Login failed. login failed for user My'server/MyuserName'"
even when i close the sql server manager , it is still stuck - the connection test doesn't work anymore.... it only work when i restart the computer.
Would be interested in any advice or comment on the issue we are experiencing with SQL 2005.
In order to test some DTS package migrations, we simply created a DTS package on SQL 2000 (using Export) to copy all database objects from one database to another.
Then we restored the source database on SQL 2005 server, migrated the DTS package, and tried to execute it.
The package migrated 'fine', ran part way, and then failed. Since then we have been unable to connect to the server (Database Engine, or Integration Services) using Windows Authentication. (Error 18456, Sev 16, State 11).
We can connect to the Database Engine using SQL Authentication (but not to Integration Services which only allows Windows Authentication).
We have been able to replicate this consistently - every annoying time we've tried it!
(Reinstalling SQL Server does 'fix' the issue ... until you try a similar package again).
Error string: [Microsoft][ODBC SQL Server Driver][SQL Server]Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection.
Error source: Microsoft SQL-DMO (ODBC SQLState: 28000)
Help file: SQLDMO80.hlp
Help context: 1131
Error Detail Records:
Error: 0 (0); Provider Error: 0 (0)
Error string: [Microsoft][ODBC SQL Server Driver][SQL Server]Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection.
Error source: Microsoft SQL-DMO (ODBC SQLState: 28000)
I have an issue dealing with connectivity between the client and Sql Server Services or Sql Authentication. I keep receiving this type of error message:Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection. I am sure my connection string is correct within my web config file, I have something like this:Data Source=myServerAddress;Initial Catalog=myDataBase;Integrated Security=SSPI; The reason why I think the connection string is correct is because I have a server where my asp.net application is stored and used, this server is called server1. Server1 is connected to MS-SQL server that is installed and used on server2. When I run my application from server1 everything is perfect, nothing goes wrong, but when I run the application from my client or local machine I get the error message saying not associated with a trusted site. Now I have the web config set to <identity impersonate="true"> that will allow windows Authentication, and I set the permissions within the database to use NT AUTHORITY NETWORK SERVICE as a user, plus my own network credentials are set within user on the database, just so I could troubleshoot the problem. But I still get the error message not associated with a trusted site. Just to recap my problem, I can see the data when I run the application in Server1, but I can't see the data when I run the application from my local machine. http://server1/MyApplication.aspx <-- this is an example of the url that I enter on my local machine to acces the application. Plus I have full acces to server1, and other application are running just fine from this server. I am using visual studio 2005, but using sql 2000, with the latest service pack for windows XP pro.
I am creating a Data Web Form using the Data Form Wizard. After configuring a valid connection to a SQL Server on my network, I receive the following error when trying to run the page: "Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection." Any ideas?
Any users out there resolve this one. Thanks in advance!Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Data.OleDb.OleDbException: Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection.Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. Stack Trace:
SQL7 server is configured to use both SQL and NT authentication. Periodically, NT authenticated users get the error "Login failed for user '(null'. Reason: Not associated with a trusted SQL Server connection." Repeating the login will eventually end in success. Microsoft article Q216848 indicates this has something to do with the version of MDAC.
We have not changed the version of MDAC on the server, but checked it and the versions are as the article states (MDAC 2.1 & SQL Driver 3.70.623).
We had a newer version on the client, but went back to the version above that came on the SQL7 CD with no luck.
Any ideas, suggestions, or similar problem experienced?
When I try to open up a table in EM I get the msg of ...Login failed for user (null)...which is me
it looks like my sid has become null...Im the system admin...do I use the procedure 'sp_change_users_login' I tried reading up on this procedure, but BOL was not very clear.
Need help for this error ---- [Microsoft][ODBC SQL Server Driver][SQL Server]Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection.
while accessing vb6 datareport through citrix client which is accessing sql2000 I got the above error msg.
vb6 datareport use the oledb provider for odbc driver with dsn for connection.It is working fine if run it locally and problem occured only through citrix client.
Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection.
It appeared nearly 20 times, then about 30 minutes after the first occurence, I noticed in my Event Viewer this error:
The registration of DNS name XXX.XXX.XXX.XX.in-addr.arpa. for network name resource 'SQL Network Name(SQLServer)' failed for the following reason:
DNS operation refused.
After that I began recieving hundreds of errors like this one:
Login failed for user 'SQL user'. Only administrators may connect at this time.
I was unable to connect to the server to see what was going on so I had to failover the server. That's why my troubleshooting is limited to error logs. After the failover, everything came up fine with no more errors. Has anyone ever encountered this before?
Hello,I have problem with linked servers (MS SQL Server 2k)- when I try to executequery(update, insert..) with linked servers, I have message Login failed foruser 'null'. This is very strange problem, some computers in AD (2k3 std)don't have this error, when the other have this problem for few hours andsome have this error all the time. Network Protocols is TCP/IP.Any idea ?
I am using a Third Party software which depends on my SQL Server 2000 for storing data. When I use Windows Security in my Third Party software, I get the following message in the event viewer of my SQL Server 2000.
Description:
18452: Login failed for user '(null)'. Reason: Not associated with trusted SQL Server connection.
When I user SA, I do not get the above error.
Any clarifications on the possibilites for getting the error is appreciated. Also let me know if we can overcome the error without using SA.
I tried the article in http://support.microsoft.com/kb/840219. But it didn't make a difference.
Im trying to make a couple of reports online for other people. My current setup is:
Machine A: SQL05 server. Machine B: ReportingServer05 and IIS 5.0 (XP machine). Machine C: Client trying to connect to Machine B and view a report. (Windows 2003)
On Machine B everything is working just fine, i can view my reports without any problems. But if i try viewing a report on Machine C, I get the following error:
An error has occurred during report processing. (rsProcessingAborted) Get Online Help Cannot create a connection to data source 'IntegrationDB'. (rsErrorOpeningConnection) Get Online Help Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection. But machine C kan browse http://machine-b/ReportServer and se the list of reports hosted, its when trying to generate the reports there is a problem. Im logged in on machine C with the same user as on Machine B.
My Shared Data Source in this VS05 project is setup to be using Integrated Security, so the "user '(null)'" part looks like Machine C dosnt supply the username, but why?
What is it that im missing in my configuration? And any addional information needed?
(First, I should explain that I am not sure whether this is the right part of the forum for this message. My apologies if I'm in the wrong place. If this is the case, could you please let me know where this post should be? Thank you.)
I have a vew that accesses data from a linked server. The view works properly in Query Analyzer but fails when run by a .Net application. The message returned is:
Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection.
The linked server has the following attributes:
Server Type: SQL Server Security: No local logins listed. Connections are made using the login's current security context.
I've read quite a few articles about resolving this login problem. "Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection. " But still can't solve mine.
I am working on a Website that can access a remote database engine which locates in the same domain. (Eventually the website and the db server would be on the same computer, but not during the development and testing.)
My code works fine when I am debugging on an ASP.NET Development Sever. I tried two users account, Windows' or SQL Server's. Both work fine under ASP.NET development server (run ASP.NET application locally).
But when I run the website from wwwroot virtual path, it throws error message:
"Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection."
Why does it this happen? And how to resolve this? Did I miss anything on local IIS side or the remote DB server?
Hi, Im getting this error when attempting to retrieve data from an sql database.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Data.SqlClient.SqlException: Cannot open database requested in login 'projectAllocations'. Login fails. Login failed for user 'sa'.
Source Error:
Line 13: objConn = New SqlConnection( "Server=LAB303-066NETSDK; Database=projectAllocations; User ID=sa;Password=mypassword") Line 14: objCmd = New SqlCommand("SELECT * FROM project_descriptions", objConn) Line 15: objConn.Open() Line 16: objRdr = objCmd.ExecuteReader() Line 17: While objRdr.Read()
Oracle and Teradata are able to capture the windows/client login that connects to their database with a functionnal ID.I've searched around and I don't think MS SQL can do this...I administer SQL 2014 server and also SAS Enterprise guide product. I've created sql server logins for several teams so everyone shares the same sql server login which is used to bind the SAS library to my SQL server database.
However, when looking at activity monitor, I can't drill down to which user is executing a particular query. I only see the SQL login which is share amongs 200 other folks.On the other hand, when they connect from SAS to Oracle or Teradata, I can see the shared login + additionally their windows NT login used to connect to SAS which is awesome....they can't fool me by using a shared/funcionnal ID....i still see who's using that ID...
In Microsoft analysis services, I get an error that login fails for user "NULL" when I try to process/build any cubes. If I edit the connection properties, it says to use "trusted" signon. If I press the "test connection" button all is well.
I definitely have serverdatabase access otherwise. Any thoughts/insights?
Thanks,
Isaac
ps: this is a sql server 2000 version of MSAS. Corresponding sql server is 2000 as well.
Hi, I have just installed Windows Vista and SQL Server 2005. When I try to connect to my local server with Windows Authentication, I get the follwoing message:
Login failed for user <user> (Microsoft SQL Server, error: 18456)
I am trying to connect SQL database through code but I get this error,I have spent days to solve it but unfortunately I couldn't...Here is my code in VB express(OP:windows 2000 with SP4)I am new to VB,so it makes the situation more difficult for me.
my code is:
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim conn1 As SqlConnection = _
New SqlConnection("Data Source=.SQLEXPRESS;" & _
"Integrated Security=SSPI;" & _
"database=deneme3_database;")
'Open connection
conn1.Open()
MessageBox.Show("Connection succeeded.")
'Close connection
conn1.Close()
MessageBox.Show("Connection closed.")
End Sub
The error message is,it is in german but it is clear I guess:)
" Die von der Anmeldung angeforderte "deneme3_database"-Datenbank kann nicht geöffnet werden. Fehler bei der Anmeldung. Fehler bei der Anmeldung für den Benutzer 'ADPLANatalay'. "
Hello All, Login failed for user '(null)'. I know this issue is all over the forum, however i have not found any posts that help me resolve the issue. Situation: I have an ASP.NET 2.0 application hosted currently on XP pro(will be moving to 2003 Server) which connects to a SQL 2000 database that resides on a different server. I have taken the following step to implement my security. Given my account permissions to the database Put the following in my web.config <add name="MyName" connectionString="Data Source=MyServer;Initial Catalog=MyDatabase;Integrated Security=SSPI" providerName="System.Data.SqlClient" /> <authentication mode="Windows" /> <identity impersonate ="true" /> I have set IIS to use integrated authentication and removed anonymous. The application works when run from the web server but not when run from a remote machine. Thank you for any asistance, George
I have an identical SQL database on two machines (my machine and a webserver) that links to a database on a third server (S3). When I executea stored procedure on my machine that accesses a database on S3, italways runs without a problem. However, when I run the same storedprocedure on the webserver (via Query Analyzer on my machine, connectedto the webserver), the stored procedure runs without a problem forabout ten minutes, and then I suddenly receive the error "Login failedfor user '(null)'. Reason: Not associated with a trusted SQL Serverconnection.". If I then connect remotely to the webserver via RemoteDesktop Connection and run the stored procedure there it works, andthen I can run it again on the webserver via Query Analyzer on mymachine, but the same problem will occur again after about ten minutes.The only difference between my machine and the webserver is that thewebserver is running Windows Server 2003, whereas my machine runsWindows XP. All settings in SQL on the two machines are identical, so Iwould love to know if anyone has a possible solution to this seeminglyrandom problem.
I have an application which uses a login with an encrypted password. Everything works well, no errors in the application. My SQL Server errorlogs keeps recording:
Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection.
I know this message is related to the login with the encrypted password (tracked it with Profiler) My question: Is it normal that the error log tracks this message because the password is encrypted?
Hi when i try and open a database in sql server management studio i get the error "Cannot open user default database. Login failed. Login failed for user 'DOMAINUser'. (.Net SqlClient Data Provider)", what can i do to rectify this, i have googled around and still havent found no answers.
When I am trying to connect my database using SQL Server Authentication option, then its showing error: "An attempt to login suing sql authentication failed. Server is configured only for Windows authentication only."
Hey Microsoft: this affects development that will eventually sell a lot of seats on SharePoint Server 2007. If you guys and gals can't straighten out this mess, you can't expect custom solutions with custom web parts. So pay attention for your own good. Yes, SPS 2007 is what this is all about. I've created simpe web parts and deployed them, same VS 2005, but I need local development and debugging for more complex stuff. I'm really disappointed that you have no solution for this problem.
I've seen other posts on this, but the result seems to be the same: if you fix it, it's by accident, not by design.
1. I created a blank ASP.NET web site
2. I added a web part manager
3. I added a web part zone
I get the error described above. I have no idea why SQL Server settings are so screwed up.
I've tried all the stuff in the other posts - security settings, command line installation, etc. None of those worked.
The default template(s) don't copy anything into App_Data, nor create an empty folder. I don't know why that is. I have other web sites working just fine, but they use remote SQL databases, or local ones I created, and didn't need profile management (no forms authentication, no web parts, no web zones).
I've also started out with a local database, using SQL Authentication, later moving it to a remote server, and never had any problems. The SQL Server developer edition and Express seem to work just fine. I can also debug stored procs when the .mdf is in App_Data. So the problem isn't one of connectivity.
What would cause the default screw-up? This would seem to point from all directions to a problem with Visual Studio (2005)? The installation is defalt - perhaps some extras included (copy local), but nothing unusual. AJAX for ASP.net is installed, but not used in the above "default web site" trial. Likewise Syncfusion's tools, which work fine on other developer workstations at this same location, all of which are from the same image (purchased at the same time & imaged). That web parts work on other boxes, running all the same management tools (anti-virus, remote sys admin/sms etc.) makes none of those suspect.
I think Microsoft needs to have a clean problem solution and publish it. SP1 certainly doesn't fix it. What's worse is the stupid, lame error message. "I can't open the default database". Well, what did you try? What do you think the default is? What settings are you using? Why is there no debugging information other than the usual worthless trace information showing it's all deep within the ProviderBase and SqlClient namespace code? How is that supposed to be helpful?
If anyone has anything solid, not guesses, I'd like to know.
