Solved

ERROR [28000] [Microsoft][ODBC SQL Server Driver][SQL Server]Login failed for user

Posted on 2006-06-13
19
8,051 Views
Last Modified: 2008-08-12
Hi Experts,

I have 2 servers using win 2003 server and IIS 6.0 and ASP.NET 2.0.50727
and I have this code for an ODBC Connection

Dim CN As New Data.Odbc.OdbcConnection
CN.ConnectionString = ProviderName=System.Data.ODBC;DSN=ODBCNAME;Database=DATABASENAME;Integrated Security=True;Persist Security Info=True;TRUSTED_CONNECTION=YES;
CN.Open()

It is working on a server and on the other it is gaving the following error:

ERROR [28000] [Microsoft][ODBC SQL Server Driver][SQL Server]Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection.
ERROR [01S00] [Microsoft][ODBC SQL Server Driver]Invalid connection string attribute
ERROR [28000] [Microsoft][ODBC SQL Server Driver][SQL Server]Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection.
ERROR [01S00] [Microsoft][ODBC SQL Server Driver]Invalid connection string attribute

And the ODBC on both servers is tested and works normaly and serveral applications using VB6 and VB.net and Crystal reports 7.

So, what is the problem?
      - ASP.NET configuration?
      - IIS Configuration?
      - Server Configuration?
      - Project configuration?
any Ideas?
0
Comment
Question by:LeDaouk
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 10
  • 4
  • 3
  • +1
19 Comments
 
LVL 43

Expert Comment

by:TimCottee
ID: 16894617
Hi LeDaouk,

A bunch of things really, ASP.NET firstly provides a built-in set of SQL specific objects which will perform better than using ODBC.

Secondly, the reason it fails is that the aspnet worker process is probably running under the default ASPNET local user account. This causes integrated security to fail. There are basically two ways around this. Either you need your asp.net application to impersonate a valid domain user or you need to use sql standard security to make the connection.

Using impersonation is effectively relaxing the security on your IIS server as an unauthorised user may be able to gain access using the credentials supplied by the application.
Using SQL authentication may expose the password for that sql user though this may be less of a risk and it can of course be obfuscated.

Tim Cottee
0
 
LVL 4

Author Comment

by:LeDaouk
ID: 16894687
thanx Tim,
I triet to use SQL Server connection It gave me the same problem.
So how to do it by code?
0
 
LVL 43

Expert Comment

by:TimCottee
ID: 16894733
LeDaouk,

Ok, first start with a

Imports System.Data.SqlClient

Then instead of your odbc connection and related stuff use:

Dim CN as SqlConnection = New SqlConnection
CN.ConnectionString = "Data Source=<SERVERNAME>;Initial Catalog=<DATABASENAME>;User ID=<SQLUSERID>;Password=<PASSWORD>;"
CN.Open()

You can then use the SQL specific SqlCommand, SqlDataReader etc in place of your ODBCCommand and ODBCDataReader objects.

Tim
0
Online Training Solution

Drastically shorten your training time with WalkMe's advanced online training solution that Guides your trainees to action. Forget about retraining and skyrocket knowledge retention rates.

 
LVL 4

Author Comment

by:LeDaouk
ID: 16894792
I tried this befrore and It gave the same result.
(Sorry But I'm new in ASP.NET)
0
 
LVL 43

Expert Comment

by:TimCottee
ID: 16894829
LeDaouk,

That's ok, I assume you are giving the correct sql server username and password here, not a domain user account. You could try for now with the sa user (if you know this) and then set up a specific user with the appropriate rights for your application when you know it works.

CN.ConnectionString = "Data Source=<SERVERNAME>;Initial Catalog=<DATABASENAME>;User ID=sa;Password=sapwd;"


Tim
0
 
LVL 4

Author Comment

by:LeDaouk
ID: 16895035
I tried now :
CN.ConnectionString = "Data Source=<SERVERNAME>;Initial Catalog=<DATABASENAME>;User ID=sa;Password=sapwd;Trusted_Connection = yes;"
and I had the following error:
Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection.
is there somthing that I should do in the sqlserver?
0
 
LVL 43

Expert Comment

by:TimCottee
ID: 16895050
LeDaouk,

How do you have the server configured? Windows authentication only or mixed mode authentication? If windows only then you need to change that.

Tim
0
 
LVL 4

Author Comment

by:LeDaouk
ID: 16895085
mixed
and I told the application with the same ODBC is working on a server and it is not on another
0
 
LVL 4

Author Comment

by:LeDaouk
ID: 16895128
I had the sam problem when I tried to run the application on a Windows XP IIS.
is there something common between these 2 cases?
0
 
LVL 4

Expert Comment

by:jvn222
ID: 16899544
do you add account aspnet to SQLServer?
In SQLServer, Try set aspnet 's permisson to Sysadmin!
0
 
LVL 4

Author Comment

by:LeDaouk
ID: 16900245
do u mean to create a user called aspnet in sqlserver or I have to add an account called aspnet from somewhere to sqlserver???
0
 
LVL 4

Expert Comment

by:jvn222
ID: 16900262
Account aspnet is account built-in for execute asp.net apps
you have to add an account called aspnet  from your computer (not create new)
0
 
LVL 4

Author Comment

by:LeDaouk
ID: 16900516
I tried this now but nothing happen
and I tried to configure the ODBC to use a sql server account and I had the same problem
0
 
LVL 4

Author Comment

by:LeDaouk
ID: 16900523
note that the sql server is installed on a remote server
so A SERVER (IIS) and B SERVER (IIS) and C SERVER (SQL SERVER)
the application on the server A is working but on the Server B is not working
0
 
LVL 4

Expert Comment

by:jvn222
ID: 16900543
you try add an account called aspnet to SQLServer from Server B (ex: ServerB\Aspnet)
0
 
LVL 4

Author Comment

by:LeDaouk
ID: 16900608
yep but i Failed, and error popup: usernot found
I tried to add the aspnet one on the C, it was successfully added but the application still not working.
and note that there is no ASPNET user for the server A.
Is there something in web.config I should do???
0
 
LVL 4

Author Comment

by:LeDaouk
ID: 16900633
aaaaaaaaaaaaaaa
I found it
it was the internet Data connector not Allowed on the IIS on B server.
Thanx any way guys.
0
 

Accepted Solution

by:
CetusMOD earned 0 total points
ID: 17141487
PAQed with points refunded (100)

CetusMOD
Community Support Moderator
0

Featured Post

What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

It was really hard time for me to get the understanding of Delegates in C#. I went through many websites and articles but I found them very clumsy. After going through those sites, I noted down the points in a easy way so here I am sharing that unde…
The article shows the basic steps of integrating an HTML theme template into an ASP.NET MVC project
In this brief tutorial Pawel from AdRem Software explains how you can quickly find out which services are running on your network, or what are the IP addresses of servers responsible for each service. Software used is freeware NetCrunch Tools (https…
Visualize your data even better in Access queries. Given a date and a value, this lesson shows how to compare that value with the previous value, calculate the difference, and display a circle if the value is the same, an up triangle if it increased…

623 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