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Existing instance of 2008 SQL Server no longer is coonecting

Posted on 2015-02-02
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Last Modified: 2015-02-06
I wonder if it has something to do with recently SQL Server 2012 installation?

FYI, SQL Server 2012 requires a login for a user as admin (to replace sa login). But, prior installation, 2008, possibly sill on SA default login and this maybe causing the problem.

I need guidance, if above point is valid, how to go about to fix this problem.

The error message is included below:
===================================

Cannot connect to USER-PC\SQL2K8ME.

===================================

A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: TCP Provider, error: 0 - No connection could be made because the target machine actively refused it.) (.Net SqlClient Data Provider)

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For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft%20SQL%20Server&EvtSrc=MSSQLServer&EvtID=10061&LinkId=20476

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Error Number: 10061
Severity: 20
State: 0


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Program Location:

   at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
   at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
   at System.Data.SqlClient.TdsParser.Connect(ServerInfo serverInfo, SqlInternalConnectionTds connHandler, Boolean ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity, Boolean withFailover)
   at System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean ignoreSniOpenTimeout, TimeoutTimer timeout, Boolean withFailover)
   at System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString connectionOptions, SqlCredential credential, TimeoutTimer timeout)
   at System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(TimeoutTimer timeout, SqlConnectionString connectionOptions, SqlCredential credential, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance)
   at System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, SqlCredential credential, Object providerInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString userConnectionOptions, SessionData reconnectSessionData)
   at System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions)
   at System.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(DbConnection owningConnection, DbConnectionPoolGroup poolGroup, DbConnectionOptions userOptions)
   at System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection)
   at System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
   at System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
   at System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1 retry)
   at System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry)
   at System.Data.SqlClient.SqlConnection.Open()
   at Microsoft.SqlServer.Management.SqlStudio.Explorer.ObjectExplorerService.ValidateConnection(UIConnectionInfo ci, IServerType server)
   at Microsoft.SqlServer.Management.UI.ConnectionDlg.Connector.ConnectionThreadUser()

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No connection could be made because the target machine actively refused it
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Question by:Mike Eghtebas
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3 Comments
 
LVL 142

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 40585591
>No connection could be made because the target machine actively refused it
this is usually either the setting that the instance itself is configured to refuse remote connections, OR some firewall (on either the server OR in the network) that block the full port or just part of the ip ranges that try to connect.

you may want to read up this article:
http://www.experts-exchange.com/Database/MS-SQL-Server/A_1881-Connect-to-your-SQL-Server.html

a simple test is to use telnet ip:port from the same machine, and if that gives no errors (usually a blank screen), the connection shall work. if you get an error, it's NOT sql server refusing, but some firewall.
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Author Comment

by:Mike Eghtebas
ID: 40585607
I think in my last installation I chose wrong setting dealing with that. My thought was, well no one else beside me is going to use this computer why do I want outside access.

But now it seems, the setting was not referring to out of the computer (access outside the computer) rather it was outside the SQL Server engine (I guess).

Knowing this, what specific steps I need to take to revisit (to locate) that setting and revise it?

I have screen shot of all of the settings saved. Perhaps after reading the above link and going over my screenshots I could figure out what to do. Or, someone could also give me some hint to resolve this issue.

Mike
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Accepted Solution

by:
Guy Hengel [angelIII / a3] earned 500 total points
ID: 40585634
you will find plenty of examples/tutorials about that setting, for example:
http://blogs.msdn.com/b/walzenbach/archive/2010/04/14/how-to-enable-remote-connections-in-sql-server-2008.aspx
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