Solved

Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection.

Posted on 2002-07-15
15
5,318 Views
Last Modified: 2009-07-29
When I am using NT Security to conect to a sqlserver database from a vb.net form using asp I get the following error:

Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection.

How do I fix this?



 
0
Comment
Question by:kenmck
15 Comments
 
LVL 22

Expert Comment

by:CJ_S
ID: 7154080
Could you show your connectionstring?

All you need are some additional items.

CJ
0
 

Author Comment

by:kenmck
ID: 7154132
   <sessionState
            mode="InProc"
            stateConnectionString="tcpip=127.0.0.1:42424"
            sqlConnectionString="data source=127.0.0.1;user id=sa;password=lob"
            cookieless="false"
            timeout="20"
    />


Thanks,
0
 
LVL 22

Expert Comment

by:CJ_S
ID: 7154184
I do not suggest using the sa user for it. And you have not specified a database.

Change it to the following:

"data source=localhost;integrated security=sspi;database=yourdatabase"

Now the user account that is being used to access the database is the ASPNET user (remember you are using WinNT security).

So you will need to give that user access to the database within SQL Server.

You know how to do that?

CJ
0
 
LVL 22

Expert Comment

by:CJ_S
ID: 7154185
Oh also:

"data source=localhost;integrated security=sspi;database=yourdatabase;Trusted_Connection=yes"

0
 

Author Comment

by:kenmck
ID: 7154351
I have set up my connection string to the following:

Dim strConn As String = "server=bkrenf;database=discovery;uid=sa;pwd=lob"

and I get connected.

When I use

Dim strConn As String = "server=bkrenf;integrated security=sspi;database=discovery;Trusted_Connection=yes"

I get an error message "Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection".

Any idea why?
0
 

Author Comment

by:kenmck
ID: 7154393
I have set up my connection string to the following:

Dim strConn As String = "server=bkrenf;database=discovery;uid=sa;pwd=lob"

and I get connected.

When I use

Dim strConn As String = "server=bkrenf;integrated security=sspi;database=discovery;Trusted_Connection=yes"

I get an error message "Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection".

Any idea why?
0
 

Author Comment

by:kenmck
ID: 7154406
I have set up my connection string to the following:

Dim strConn As String = "server=bkrenf;database=discovery;uid=sa;pwd=lob"

and I get connected.

When I use

Dim strConn As String = "server=bkrenf;integrated security=sspi;database=discovery;Trusted_Connection=yes"

I get an error message "Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection".

Any idea why?
0
What Security Threats Are You Missing?

Enhance your security with threat intelligence from the web. Get trending threat insights on hackers, exploits, and suspicious IP addresses delivered to your inbox with our free Cyber Daily.

 
LVL 22

Expert Comment

by:CJ_S
ID: 7154409
I think because of the integrated security item.

The first error is because you have not provided a default database you want to connect to. I'd still say that the Trusted_Connection property should be in there since it is a trusted connection. And if it is you will encounter an error when you ommit that item.

I have no idea why your first sample works without the Trusted_Connection item. :-/

CJ
0
 

Author Comment

by:kenmck
ID: 7154549
Nope still cannot get this to work. How do I use a Trusted Connection or NT Security to connect?

Have you got any examples?
0
 
LVL 22

Expert Comment

by:CJ_S
ID: 7154610
I used the following:

Provider=sqloledb;initial catalog=MYDATABASE;Trusted_Connection=yes;data source=(local);Connect Timeout=20


However, searching for the error you got you get to some pages that explain this error in more detail:

"Trusted_Connection=true;database=MYDATABASE;server=(local)"
0
 
LVL 23

Expert Comment

by:naveenkohli
ID: 7155822
Try setting the impersonation to true in web.config file. By setting it to true, you will be connecting to SQL server under the context of windows login that is logged oonto clinet machine. Otherwise you are connecting as ASPNET account.

<identity impersonate="true">
0
 

Author Comment

by:kenmck
ID: 7156517
Login failed for user 'NT AUTHORITY\ANONYMOUS LOGON'

is now my error message.

Help!
0
 

Author Comment

by:kenmck
ID: 7156543
Login failed for user 'NT AUTHORITY\ANONYMOUS LOGON'

is now my error message.

Help!
0
 
LVL 4

Accepted Solution

by:
kpkp earned 100 total points
ID: 7156807
What type of connection do you _want_ to use?  If you want to specify and account to use in the connecition string, then (assuming this is a SQLServer) use:

Dim strConn As String = "data source=bkrenf;initial catalog=discovery;user id=sa;password=lob"


are you assigning the connecion string to the SqlConnection object?
0
 

Expert Comment

by:kaytrim
ID: 7190846
Sorry to barge in on the experts here but here is a sample connection string that I use to asscess from ASP.NET

"server=servername; trusted_connection=false; uid=username; pwd=password; Database=databasename"

The key is that the trusted connection can only be true of the sql server and the app server are the same machine.

Micahel
0

Featured Post

Do You Know the 4 Main Threat Actor Types?

Do you know the main threat actor types? Most attackers fall into one of four categories, each with their own favored tactics, techniques, and procedures.

Join & Write a Comment

This document covers how to connect to SQL Server and browse its contents.  It is meant for those new to Visual Studio and/or working with Microsoft SQL Server.  It is not a guide to building SQL Server database connections in your code.  This is mo…
Today I had a very interesting conundrum that had to get solved quickly. Needless to say, it wasn't resolved quickly because when we needed it we were very rushed, but as soon as the conference call was over and I took a step back I saw the correct …
Internet Business Fax to Email Made Easy - With eFax Corporate (http://www.enterprise.efax.com), you'll receive a dedicated online fax number, which is used the same way as a typical analog fax number. You'll receive secure faxes in your email, fr…
You have products, that come in variants and want to set different prices for them? Watch this micro tutorial that describes how to configure prices for Magento super attributes. Assigning simple products to configurable: We assigned simple products…

744 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

12 Experts available now in Live!

Get 1:1 Help Now