.NET Framework :: Windows Authentication With Different User

Sep 24, 2015

Below is the scenario

I have 2 users.

User1 : have sql rights on database but dont have rights to login into windows
User2 ; have rights to login into system but dont have access rights to database

Now I have windows application and i have logged into system with User2 and want to run windows application with the rights of User1. How can i achieve this.

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Windows Authentication - Cannot Generate SSPI Context - Login Failed For User ''. The User Is Not Associated With A Trusted SQL

May 29, 2007


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.

Thanks,

Jon

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Dec 30, 2007

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I have the MSSQL engine running and I have connected with the SERVER.  My database is in my directory tree of Microsoft SQL Management Studio Express.  The server is SCOTSQLEXPRESSI have attempted to add a login to my sql database by right clicking on the security folder to create a new login.  My understanding is that under windows, I don't need a uid and pwd in my connection string .  Thus I tried removing all of this just as you see above, and I get an error message every single time I try to create a login with windows authentication.
Can someone please explain how I make this work? 
Thank you.
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Jun 28, 2007

Is there a way to connect to database using Windows authentication as a different user than what you've logged in with to your desktop?



For example:

I log on to my desktop as mydomainme. I'm developing queries using Management Studio against a database (on another server) where mydomainme doesn't have access, but the admins have granted access to mydomainJobs1. I have the password for mydomainJobs1, and I'm hoping I can connect to the database using that account without having to log-off my local desktop as mydomainme and then re-login using mydomainJobs1.



The analogy in the file/share-permissions world would be using "net use" from a command prompt:

net use \SomeServer /User:mydomainJobs1 jobs1password



Anything similar for SSMS?

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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:
<authentication mode="Windows"/><identity impersonate="true"/>
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.
Any ideas?
 

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Aug 2, 2007

I'm trying to connect to a SQL Server 2005 database engine on a local network server. When I am presented with the Connect to Server dialog box, if I select Windows Authentication from the Authentication drop-down, the User name & Password area is grayed out and unusable. The domain user account I'm authenticated with is visible, but grayed out, and the password field is blank and unusable. I'd like to be able to connect as described in help:


User name


Enter the user name to connect with. This option is only available if you have selected to connect using Windows Authentication.

I can connect with either SQL Server or Windows authentication... but with Windows Authentication I'd love to be able to type a specific user name to select with :-)

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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?

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Feb 13, 2006

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).

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Hello,

(Using win2k, sqlserver2k, framework 1.1)
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On the dev server everything works fine but when I move to the live server things get strange and it starts to crawl along. (Pages load OK but then it just crawls as it loads the datagrids etc. Sometimes it brings back incomplete/incorrect data )

BUT When I use Sql Authentication to connect to Sql Server and there is no problem at all!

Ok, there is something obviously wrong with the live server (which is identical setup to dev)but I dont know where to start.

Any ideas??

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Since the server has already been configured to use Windows Integrated Authentication for the existing database and application, how do I configure the other database to use the SQL password?

Thanks.

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May 12, 2006

Hi all,

My work is using a shared application
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folder on the Windows 2003 Server is shared and users can access the
folder through a shared drive.


For the application to access the
database, it uses an ODBC connection to the MSSQL server which
originally used the SA password.


We have recently switched to using
Windows Integrated Authentication because we believe it offers a
higher level of security. However the only way in which we have been
able to enable this is to add the windows users to the SQL server.


The problem with this is that the
application sets permissions for individual users on what records
they can see within the database. We have found that by adding the
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set by the application by simply using any application that can use
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One way around this would be to set up
domains of users with access privileges to the tables which reflect
the permissions set by the application, and configuring a view of the
data so they may only see the records that they have permissions to.
However to do this would require a high administrative cost to ensure
that changes made in the application are reflected in the privileges
of the SQL server.

Instead, is there a way the SQL server
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application using Windows Integrated Authentication?

This would allow the applcation to
determine security, and stop users from connecting to the SQL server
using other applications.

Alternatively, can the SQL server,
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Any help with this matter would be
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Thanks!

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Hallo there,

I just upgraded from Windows XP Pro to Windows Vista Bussiness and tried to reinstall SQL Server 2005 Developers Edition. After the installation i downloaded (using microsoft windows update) and installed all the service packs for sql and vista available.

My problem is when i open sql server management studio and try to connect to my default instance using windows authentication and database engine, an 18456 error occurs.

I enabled all the protocols and all the ports
I disabled windows firewall and antivirus (eset nod32)
I installed all service packs available
I have also installed Visual Studio 2005 without installing sqlexpress

But nothing happens!

Please i am very desperate, any information will be gratefully accepted.

This is my installation Information



Code Snippet

Microsoft SQL Server Management Studio 9.00.3042.00
Microsoft Analysis Services Client Tools 2005.090.3042.00
Microsoft Data Access Components (MDAC) 6.0.6001.18000 (longhorn_rtm.080118-1840)
Microsoft MSXML 3.0 5.0 6.0
Microsoft Internet Explorer 7.0.6001.18000
Microsoft .NET Framework 2.0.50727.1434
Operating System 6.0.6001


Thank you in advance,
Patonios


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