Securing The MS SQL Server 2005 Database On Client Side

Apr 27, 2006

Hello!

I developed database driven .NET application and I need to deploy it. I faced a problem, which is "how to protect my database against direct access". I use MS SQL Server 2005 Express Edition as a DBMS and appropriate database.

I want to make possible to manipulate with data in my database only through my client application.

1. How do I define SA password and instance name in silent mode of MS SQL 2005 EE installation with Mixed type of Authentication?

1.1. Can I change SA password after the installation?

2. If my database be attached to my new instance... Is it possible to copy my database, attach it to another instance and get a direct access to its objects?

Is there solution that make impossible to connect to my database on third-partie's side Idirectly, without using the client application?

I appriciate for a help.

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waiting for answers.....

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Hi All,

My apologies if this question seems abit basic, but I'm a DBA by trade and programming .Net isn't my strong point ;)



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Thanks in advance.



Imports System.Data.SqlClient



Public Class Form1

Dim DCTADS As New SqlClient.SqlConnection

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

DCTADS.ConnectionString = "Network=dbmssocn; Server=STUD; Failover Partner=DBDRTEST; Database=mirrortest; Integrated Security=True"

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End Sub



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End Sub

End Class

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I plan to upgrade my server to SQL 2005. It is a rather old machine, but still ok with the recommended hardware requirements.

It runs Windows 2000 (SBS) server, which is also a PDC, DHCP, DNS, Exchange server (I stop here but the list is long), with SQL Server 2000 Standard Edition (one single named instance). Everything localized (Italian).

I upgraded the database in a development machine and it works perfectly.

I installed SQL 2005 Standard Edition (English locale) on the server (default instance, MSSQLSERVER), and I have run in a lot of troubles.

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A tipical error I get is:

Codice evento: 3005
Messaggio evento: Eccezione non gestita. (Unhandled exception)
Ora evento: 04/05/2006 13.42.26
Ora evento (UTC): 04/05/2006 11.42.26
ID evento: 7c2749235b7d4c578591871217f74046
Sequenza evento: 175
Occorrenza evento: 24
Codice dettagli evento: 0
Informazioni applicazione:

Dominio applicazione: /LM/W3SVC/1/Root/intranet-1-127912101551093750
Livello di attendibilità : Full
Percorso virtuale applicazione: /intranet
Percorso applicazione: F:Inetpubwwwrootintranet
Nome computer: IQ
Informazioni processo:
ID processo: 684
Nome processo: aspnet_wp.exe
Nome account: mycompanyIWAM_IQ
Informazioni eccezione:
Tipo di eccezione: SqlException
Messaggio eccezione: Login failed for user 'mycompanystefania'.
Informazioni richiesta:
URL richiesta: http://intranet/intranet/articoli/venditeProd.aspx?Codice=SOL T1
Percorso richiesta: /intranet/articoli/venditeProd.aspx
Indirizzo host utente: 10.0.0.127
Utente: mycompanystefania
Autenticazione: True
Tipo di autenticazione: NTLM
Nome account thread: mycompanyIWAM_IQ
Informazioni thread:
ID thread: 1
Nome account thread: mycompanyIWAM_IQ
Rappresentazione: True
Analisi dello stack: in System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
in System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj)
in System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)
in System.Data.SqlClient.SqlInternalConnectionTds.CompleteLogin(Boolean enlistOK)
in System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance)
in System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance)
in System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection)
in System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnection owningConnection, DbConnectionPool pool, DbConnectionOptions options)
in System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject)
in System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject)
in System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject)
in System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection)
in System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory)
in System.Data.SqlClient.SqlConnection.Open()
in intranet.Global.Session_Start(Object sender, EventArgs e)
in System.Web.SessionState.SessionStateModule.RaiseOnStart(EventArgs e)
in System.Web.SessionState.SessionStateModule.CompleteAcquireState()
in System.Web.SessionState.SessionStateModule.BeginAcquireState(Object source, EventArgs e, AsyncCallback cb, Object extraData)
in System.Web.HttpApplication.AsyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
in System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

I also tried to use named pipes on the 2005, but I was unable to access the SQL 2005 server instance from a network computer running the Management Studio. I need to have the new SQL server working besides the old one, for a short period, to evaluate in the production environment if the legacy hardware is actually ok to support it. Any ideas?

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