An Attempt Was Made To Access A Socket In A Way Forbidden By Its Access Permissions.

Re: Possible Vista-only security issue opening a TCP connection to SQL2005


Please help. I have a problem that appears to be rare. I'm testing the culmination of a year's work and the error I'm getting is at the most basic level (the SQL connection) while everything else so far is working as coded.

My client is Windows Vista, apparently no firewall (I say apparently as in recent years MS have put more and more facades over the actuality of the operating systems), my server is Windows 2003 Server b3790 SP2 with SQL 2005 Standard 1399.06, again no firewall.

PortQuery 2.0 reckons that the server is listening on port 1433, too, so it doesn't seem like a firewall issue.

Nothing reported in either Event Viewers.

Here's the stack dump:

Unhandled Exception: System.Data.SqlClient.SqlException: An error has occurred while establishing a connection to the server. When connecting to
SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider:
TCP Provider, error: 0 - An attempt was made to access a socket in a way forbidden by its access permissions.)
at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj)
at System.Data.SqlClient.TdsParser.Connect(ServerInfo serverInfo, SqlInternalConnectionTds connHandler, Boolean ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity, SqlConnection owningObject)
at System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, Boolean ignoreSniOpenTimeout, Int64 timerExpire, SqlConnection owningObject)
at System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(String host, String newPassword, Boolean redirectedUserInstance, SqlConnection owningObject, SqlConnectionString connectionOptions, Int64 timerStart)
at System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance)
at System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance)
at System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection)
at System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnection owningConnection, DbConnectionPool pool, DbConnectionOptions options)
at System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject)
at System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject)
at System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject)
at System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection)
at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory)
at System.Data.SqlClient.SqlConnection.Open()
at Robot.Data.Support.ExecuteStoredProcReader(String connectionString, String procName, IDictionary`2 parameters) in P:Visual Studio 2005ProjectsRobotRobot.DataSupport.cs:line 44
at Robot.Data.Analytics.FetchableCollection.ExecuteByIYLT(String criterion) in P:Visual Studio 2005ProjectsRobotRobot.Data.AnalyticsFetchableCollection.cs:line 78
at Robot.Data.Analytics.FetchableCollection.Robot.Core.Interfaces.IFetchable.Fetch(String criterion) in P:Visual Studio 2005ProjectsRobotRobot.Data.AnalyticsFetchableCollection.cs:line 49
at Robot.Data.Analytics.FetchableCollection.Fetch(String criterion) in P:Visual Studio 2005ProjectsRobotRobot.Data.AnalyticsFetchableCollection.cs:line 41
at Robot.Data.Analytics.AnalyticsDalc.Prefetch(String criterion, AnalysisTypeEnum analysisType) in P:Visual Studio 2005ProjectsRobotRobot.Data.AnalyticsAnalyticsDalc.cs:line 167
at Robot.Data.Analytics.AnalyticsDalc.FillRankedCollection(RankedCollection& emptyRc) in P:Visual Studio 2005ProjectsRobotRobot.Data.AnalyticsAnalyticsDalc.cs:line 115
at TestHarness.Program.Main(String[] args) in P:Visual Studio 2005ProjectsRobotTestHarnessProgram.cs:line 35


And here's the connection string, which is built using the SqlConnectionStringBuilder:

"Data Source=192.168.2.2;
Initial Catalog=Research;
Integrated Security=False;
Persist Security Info=False;
User ID=usr_research_dalc_www02;
Password=usr_research_dalc_www02;
Pooling=True;
MultipleActiveResultSets=True;
Network Library=dbmssocn;
Application Name="Analytics Data Access Layer""

I have tried an old project which used to connect to the same server using a more basic connection string (it was a project which populated my Research db with fake data) and it also fails. When I ran this project successfully I'm pretty sure it was on an XP client.

I have also ran my TestHarness .exe on another client (WinXP) and it appears to pass this point and raises an exception that I believe is caused at a later point - so it looks like a Vista client issue.

Thanks in advance for your help,

Luke

P.S. Some losely related thoughts; the MSDN forum system still logs me out on Vista when I try to submit a thread, please sort this out! You can't expect your customers to run around deleting cookies. Also, when will you finally deprecate the default Named Pipes!? And finally, having that "does not allow remote connections" error spewed out with all connection errors is a really bad design choice, in my opinion.