Remote Network Connection - Error 26
Nov 19, 2007
I am converting over from MSDE to SQL Express. My front end program is unable to connect to the database. To troubleshoot, from the remote computer I tried connecting with the management program and I get the Error 26 unable to connect.
Here is what I have done: I made sure that the SQL Server configuration has been changed to allow network connections (both TCP and named pipes). I have disable windows firewall on both machines. I confirmed that I can connect from the remote machined to the server by network browsing. Both machines are running XP Proff. There is no other security software running on either machine.
More Info. when attempting to log on I am using the server authntication, I use "sa" as the user id plus my password.
Goal. The front end of database program connects to the server remotely using a program called Hamachi over the internet. This works without a problem on MSDE. But for now I am simply try to connect using the managment program which lets you browse for other serves. When I do this it shows the remote computer, but not the name of the computer but not the SQL server which I type in like the following: "INTELsql1"
What I have not Done: I have not changed any permissions or added any users to the server, since this does not seem necessary. As stated the user of remote machine can connect to the server and change files.
Would appreciate any suggestions or tips. Thanks.
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Jul 2, 2007
hi
i added 2 databases to my SQL server on a machine next door using Microsoft SQL server management studio express... I made sure that the server allows remote connection
then from this computer i pass a connection string to my SQLCLient in VB2005 that looks a bit like this
Code: ( text )
ConnString = "Server=USER-PTDH8Z5ESHSQLEXPRESS;Database=FSS.MDB;Trusted_Con nection=True;User Instance=True"
for which it gives me this error when i open the connection
SQLConnecton.Open()
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: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)
at System.Data.SqlClient.SqlInternalConnection.OnErro r(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndW arning(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.Att emptOneLogin(ServerInfo serverInfo, String newPassword, Boolean ignoreSniOpenTimeout, Int64 timerExpire, SqlConnection owningObject)
at System.Data.SqlClient.SqlInternalConnectionTds.Log inNoFailover(String host, String newPassword, Boolean redirectedUserInstance, SqlConnection owningObject, SqlConnectionString connectionOptions, Int64 timerStart)
at System.Data.SqlClient.SqlInternalConnectionTds.Ope nLoginEnlist(SqlConnection owningObject, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance)
at System.Data.SqlClient.SqlInternalConnectionTds..ct or(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance)
at System.Data.SqlClient.SqlConnectionFactory.CreateC onnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection)
at System.Data.ProviderBase.DbConnectionFactory.Creat ePooledConnection(DbConnection owningConnection, DbConnectionPool pool, DbConnectionOptions options)
at System.Data.ProviderBase.DbConnectionPool.CreateOb ject(DbConnection owningObject)
at System.Data.ProviderBase.DbConnectionPool.UserCrea teRequest(DbConnection owningObject)
at System.Data.ProviderBase.DbConnectionPool.GetConne ction(DbConnection owningObject)
at System.Data.ProviderBase.DbConnectionFactory.GetCo nnection(DbConnection owningConnection)
at System.Data.ProviderBase.DbConnectionClosed.OpenCo nnection(DbConnection outerConnection, DbConnectionFactory connectionFactory)
at System.Data.SqlClient.SqlConnection.Open()
at Flying_School_Scheduler.DBEngine.StartConnection() in
whats the big idea?
i'm in a bit of a tight schedule here... can anyone help me here? ??
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Sep 27, 2007
This has to be an easy question.
WORK2 - My workstation (xp pro)
WORK3 - Location of SQL Express 2005
WORK3COMPANY
sa,password
WORK3 is a XPPro, both WORK2 and 3 have full admin rights to their machines and the network, I am using SQL Authentication (sa, password)
I have used the SQL Server Config app to enable the 4 Protocols, then restarted service. I can connect locally to my database via "SQL Server Management Studio Express", and through my VB application. I have checked "allow remote connections" in the database properties.
I do not know what i am missing? any thoughts?
Thanks in Advance
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Dec 10, 2007
I get the following error and have been trying to figure out why I keep getting it. Initially, I had placed my project under wwwroot folder and ran it under IIS and it gave this error. Then I moved it to my local C drive and same thing. I am sharing this project with two other co-workers and all our config files and code files are same...they don't get this error but I do. I checked that SQL Server Client Network Utility has TCP/IP and the 'Named Pipes' enabled. I thought maybe I have setting in the Visual Studio 2005 that I'm not aware of that's causing this problem...it can't be the server since my co-workers aren't having this error and can't be anything in the code since all of us are sharing this project through vss. I dont' think using different version of .net framework can create this error. I changed the version from 2.0 to use 1.1x and it gave same error... Any help would be greatly appreciated. Thanks in advance.
Server Error in '/RBOdev' Application.
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: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: 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: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. Stack Trace:
[SqlException (0x80131904): 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: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)]
System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +739123
System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) +188
System.Data.SqlClient.TdsParser.Connect(ServerInfo serverInfo, SqlInternalConnectionTds connHandler, Boolean ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity, SqlConnection owningObject) +685966
System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, Boolean ignoreSniOpenTimeout, Int64 timerExpire, SqlConnection owningObject) +109
System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(String host, String newPassword, Boolean redirectedUserInstance, SqlConnection owningObject, SqlConnectionString connectionOptions, Int64 timerStart) +383
System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance) +181
System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance) +170
System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection) +130
System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnection owningConnection, DbConnectionPool pool, DbConnectionOptions options) +28
System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject) +424
System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject) +66
System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject) +496
System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) +82
System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) +105
System.Data.SqlClient.SqlConnection.Open() +111
System.Web.DataAccess.SqlConnectionHolder.Open(HttpContext context, Boolean revertImpersonate) +84
System.Web.DataAccess.SqlConnectionHelper.GetConnection(String connectionString, Boolean revertImpersonation) +197
System.Web.UI.WebControls.WebParts.SqlPersonalizationProvider.GetConnectionHolder() +16
System.Web.UI.WebControls.WebParts.SqlPersonalizationProvider.LoadPersonalizationBlobs(WebPartManager webPartManager, String path, String userName, Byte[]& sharedDataBlob, Byte[]& userDataBlob) +195
System.Web.UI.WebControls.WebParts.PersonalizationProvider.LoadPersonalizationState(WebPartManager webPartManager, Boolean ignoreCurrentUser) +95
System.Web.UI.WebControls.WebParts.WebPartPersonalization.Load() +105
System.Web.UI.WebControls.WebParts.WebPartManager.OnInit(EventArgs e) +497
System.Web.UI.Control.InitRecursive(Control namingContainer) +321
System.Web.UI.Control.InitRecursive(Control namingContainer) +198
System.Web.UI.Control.InitRecursive(Control namingContainer) +198
System.Web.UI.Control.InitRecursive(Control namingContainer) +198
System.Web.UI.Control.InitRecursive(Control namingContainer) +198
System.Web.UI.Control.InitRecursive(Control namingContainer) +198
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +692
Version Information: Microsoft .NET Framework Version:2.0.50727.832; ASP.NET Version:2.0.50727.832
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Aug 22, 2007
Hi all,
I have SQL Server Express and VB 2005 Express installed in a Microsoft Windows XP Pro PC that is a terminal PC in our office Network. My Network Administrator has granted my terminal PC for Administrator Use. I tried to do the ADO.NET 2.0-VB 2005 programming in my terminal PC and I could not get a remote connection in the Window Form Application via Window Authorization. I do not know how to make this kind of remote connection in my Network. Please help and advise.
Thanks in advance,
Scott Chang
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Mar 1, 2008
Hi,
We are running a software which has a sql database and it runs a data cycle everyday in which it gets data from several other sql servers on our network.
Recently we have starting receiving the following errors during this run;
Network Error IOException: Connection Timed Out: Connect
It finishes most of the queries in the script, but on some (and not always the same tables) it gives the time out error. I am not quit sure where or how to research this problem.
Any ideas are welcome!
Thanks,
Michiel
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Nov 26, 2006
We have a SQL 2005
clustered server (Microsoft Cluster Services) that is queried from 4 IIS6
Windows Server 2003 frontends. Each frontend runs both classic ASP apps
connection with SQL Server ODBC and .NET2 apps connecting with
System.Data.SqlClient. Ocassionaly we get a string of errors/timeouts opening a
connection lasting maybe 2 minutes.
One the classic ASP
apps we log one of these two errors:
Microsoft OLE DB Provider for ODBC
Drivers (0x80004005)
[Microsoft][ODBC SQL Server
Driver][DBNETLIB]General network error. Check your network
documentation
or
Microsoft OLE DB Provider for
ODBC Drivers (0x80004005)
[Microsoft][ODBC SQL Server
Driver]Timeout expired
on the
ADODB.Connection.Open
On the .NET2 apps we
log
Message Timeout expired. The timeout
period elapsed prior to completion of the operation or the server is not
responding.
StackTrace 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
System.Web.SessionState.SqlSessionStateStore.SqlStateConnection..ctor(SqlPartitionInfo
sqlPartitionInfo)
Source .Net SqlClient Data Provider
Any ideas for further debugging?
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Apr 9, 2008
hi
i am working with Asp.net2.0,Sqlserver2000.
i uploaded my developed application to the webserver.
all webpages are opening..bt when i try to interact with database it is raising error as following..
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: SQL Network Interfaces, error: 25 - Connection string is not valid) at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
i set Enamble to namedPipes,Tcp/IP
i set Remote connection to enable
my web.config looks like this..
<?xml version="1.0"?>
<configuration> <appSettings>
<add key="cn" value="User ID=redot;Password=redot;Data Source=216.185.43.148:1423;Initial Catalog=redot" /> <!--<remove key="LocalSqlServer"/> ;ProviderName=System.Data.SqlClient-->
</appSettings> <connectionStrings> <!--<remove name="LocalSqlServer"/>-->
<add name="redotConnectionString" connectionString="Data Source=216.185.43.148:1423;Initial Catalog=redot;User ID=redot;Password=redot" providerName="System.Data.SqlClient" /> <add name="redotConnectionString1" connectionString="Data Source=216.185.43.148:1423;Initial Catalog=redot;User ID=redot;Password=redot" providerName="System.Data.SqlClient" /> <add name="redotConnectionString2" connectionString="Data Source=216.185.43.148:1423;Initial Catalog=redot;User ID=redot;Password=redot" providerName="System.Data.SqlClient" /> <add name="redotConnectionString3" connectionString="Data Source=216.185.43.148:1423;Initial Catalog=redot;User ID=redot;Password=redot" providerName="System.Data.SqlClient" /> <add name="redotConnectionString4" connectionString="Data Source=216.185.43.148:1423;Initial Catalog=redot;User ID=redot;Password=redot" providerName="System.Data.SqlClient" /> <add name="redotConnectionString5" connectionString="Data Source=216.185.43.148:1423;Initial Catalog=redot;User ID=redot;Password=redot" providerName="System.Data.SqlClient" /> <add name="redotConnectionString6" connectionString="Data Source=216.185.43.148:1423;Initial Catalog=redot;User ID=redot;Password=redot" providerName="System.Data.SqlClient" /> <add name="redotConnectionString7" connectionString="Data Source=216.185.43.148:1423;Initial Catalog=redot;User ID=redot;Password=redot" providerName="System.Data.SqlClient" /> <add name="redotConnectionString8" connectionString="Data Source=216.185.43.148:1423;Initial Catalog=redot;User ID=redot;Password=redot" providerName="System.Data.SqlClient" /> <add name="redotConnectionString9" connectionString="Data Source=216.185.43.148:1423;Initial Catalog=redot;User ID=redot;Password=redot" providerName="System.Data.SqlClient" /> <add name="redotConnectionString10" connectionString="Data Source=216.185.43.148:1423;Initial Catalog=redot;User ID=redot;Password=redot" providerName="System.Data.SqlClient" /> </connectionStrings> <system.web>
<sessionState mode="InProc" stateConnectionString="tcpip=127.0.0.1:42424" sqlConnectionString="data source=216.185.43.148:1423;User ID=redot;Password=redot;Trusted_Connection=True" cookieless="false" timeout="60" />
<compilation debug="true" /> <!-- The <authentication> section enables configuration of the security authentication mode used by ASP.NET to identify an incoming user. -->
<customErrors mode="Off"> <error statusCode="404" redirect="filenotfound.htm" /> </customErrors>
</system.web> <system.net>
<mailSettings>
<smtp> <network host="216.185.54.55" port="25" /> </smtp> </mailSettings>
</system.net></configuration>
i will be very thankful ,if anyone help me to resolve this problem..
pls..its urgent for me
Thanks& Regards
Shobha
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Nov 13, 2001
I am connecting a access database to SQL Server and lately I have been getting this error every once in a while. Any idea why?
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Nov 5, 2006
Hy everyone,
I have a problem at pulling data on PDA using Sql Mobile 5 from Sql Server 2000.
It work s for most tables, except for two . Every table of those two has about 1000 records and every record about 150 bytes, so all data is about 150 kbytes.
When I connect to the Sql Server 2000 through LAN, no problem. But when I connect through GPRS - VPN, the error occurs. But, the PDA- phone connection is via Bluetooth and at ping no TimeOut appears, the replies are about 600-700 ms. When connecting with a desktop computer through GPRS no such problem occurs.
So , I don't know what could be the cause: the connection or the Sql Mobile which doesn't retry enough in case of error to transfer all data .
A specialist from the GPRS provider told me to use 3G phone , but , because the GPRS phones have already been bought, this would be a too big investment. So, I don't think this is a good idea in this moment .
I found similar problem on the net and a solution was to use Pooling = False. But , in Sql Mobile there is no pulling parameter available when making the connection string .
Any help is very precious to me ,
Mihai .
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Jun 24, 2006
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: SQL Network Interfaces, error: 26 - Error
Locating Server/Instance Specified)
I have enabled the remote connection in the surface area configuration, and i've also enabled my sql browser.
This error raised when i'm testing my just installed WSRFdotnet using
NUnit testing, however, when I tested my remote connection using SQL
Server Management Studio Express CTP, it worked. btw, I'm using SQL
Express
any solutions?
thx
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Sep 18, 2006
hi communitythe error something like this " error 40, could not open connection to sql server" . For community information i try to transfer my membership table from sql express 2005 to sql server 2000. my application something like email where user need to create their account first before they can log in. I use membership default in mssql express . and my datacenter do not support sql express ( like all we know most of them). I already surf some tips from the internet how we can transfer our membership from sql exppress to sql server but i get this error . i already try to change the setting from sql server surface area configuration but it still not working.. i hope someone ( the jedi ) can help me .. ThankMay The Force Be With U
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Oct 6, 2007
hello allmy web page occur this errorAn 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: Named Pipes Provider, error: 40 - Could not
open a connection to SQL Server) what is this, my site does not contain the remote connection i m using sql server 7.0so please help me Ashwani Kumar
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Dec 3, 2007
when connecting to database it give me the error like this
Message "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: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)" string
can you have any idea to solve it..
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Jun 2, 2007
Hi.Its really become a nightmare solving remote SQL Server connection. I thought it was going to be easy. Anyway im using win xp sp2 and sql 2k5 express as testing environment. I followed trouble shooting
tips:
http://blogs.msdn.com/sql_protocols/archive/2006/09/30/SQL-Server-2005-Remote-Connectivity-Issue-TroubleShooting.aspx
and secured all requirements to met one by one.
I created a test script (ASP) running on the same box where the SQL Server was installed and its running perfectly (eg http://127.0.0.1/sql.asp OR http://localip/sql.asp) either using one of the following connection string
cn.Open "Driver={SQL Server};" & _
"Server=live-static -ip;" & _
"Address=local-ip,1433;" & _
"Network=DBMSSOCN;" & _
"Database=xxx;" & _
"Uid=xx;" & _
"Pwd=xxx;"
OR
cn.Open "Provider=sqloledb;Network Library=DBMSSOCN;" & _
"Data Source=local-ip,1433;" & _
"Initial Catalog=testdb;" & _
"User ID=xx;Password=xx;"
now i upload the page to our domain host and try to access but its sending an error:
################ ERROR MESSAGE
Microsoft OLE DB Provider for ODBC Drivers error '80004005'
[Microsoft][ODBC SQL Server Driver][TCP/IP Sockets]SQL Server does not exist or access denied.
/sql.asp, line 6
########################################
sql browser is also running, and remote connections allowed, port exemption and firewall is turn off but im receiving the same error.
where im getting wrong.
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Dec 4, 2007
Through the SMS tool, the following error is being received:
===================================
Cannot connect to MyServerMyInstance.
===================================
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: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified) (.Net SqlClient Data Provider)
Note: obviously the server/instance of MyServerMyInstance is fake :).
The setup is the developers receiving this error are connecting to the domain remotely through a VPN connection (so they are on a different, non trusted domain). Also, the IP address our server is on uses an internal range that the remote developers already have in use for something else on their network. So we gave them a bogus IP to use where we then perform a 1-to-1 NAT translation on our end to the correct IP. This all appears to work but the developers still receive this error.
We do have remote connections enabled for both TCP/IP and NetBIOS and everyone at our office can connect just fine. With this in mind, what could be some other issues that can cause this? The only other thing I can think of is somewhere (there are 2 firewalls involved - ours and theirs) is that the UDP packets are not being received by the client.
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Mar 30, 2008
I am getting this error
"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:Named Pipes Provider,error:40-Could not open a connection to SQL Server)(Microsoft SQL Server,Error:2)"
in SQL EXPRESS 2005"
1.Just changing the service config settings that is TCP/IP to enable will it work?i changed i run my application but it didn't work they have written the code to the server(connection string to their server- if it was to common how to write the code ?) & is there any other changes ?
2.I have developed a VB.NET EXE file -In that application(inside the code) i am using run time connection string queries to connect to the database & created run time tables.?
Suppose if i want to install the application to all clients/users how to Configure that application - self configuration/self installer to the installing machine SQL SERVER.
How can i do this ?
3.Is there any way i can write config file for sql server along with exe application code ? How can i do this ?
Pls answer with details/screenshots or diagramatical (if possible)
pls reply asap
Dotnetnewbiw
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Jun 2, 2007
Its been almost 2 months i start running a test script page to check if i made the remote connection until now its getting worst.
I did follow every bit of the instruction and pre-evaluation in fact the script is working locally with this string:
cn.Open "Driver={SQL Server};" & _
"Server=global-static-ip;" & _
"Address=local ip,1433;" & _
"Network=DBMSSOCN;" & _
"Database=testdb;" & _
"Uid=xx;" & _
"Pwd=xx;"
i also review the ff post for client and server trouble shooting tips:
http://blogs.msdn.com/sql_protocols/archive/2006/09/30/SQL-Server-2005-Remote-Connectivity-Issue-TroubleShooting.aspx
surface configuration, sql browser, firewall exemption...
and nothing seems change when i access the uploaded script.
is there anything i am missing?
by the way the script is uploaded by company.
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Aug 21, 2006
I am trying to connect to an instance of SQL Express through a vpn, simply using the SQL Management Studio, providing the server ip address x.x.x.xMSSQLSERVER, and using SQL authentication login. I receive the following message:
Cannot connect to <server>, etc., etc.
error 25: - Connection string is not valid
Does anyone understand this? I am trying to connect through the SQL Server Management interface, not with a client program that would utilize a connection string. Is there something which prevents Management Studio from working over a vpn?
To connect, I am using SQL authentication, and have verified the login and password locally on the target pc. The SQL browser service is running on the target pc, and I can telnet to the port which it is monitoring, through the same vpn connection. Remote connections are enabled for TCP/IP in the Surface Area configuration on the target pc.
Any help appreciated.
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Nov 19, 2007
Overview. I am converting over from MSDE to SQL Express. My front end program is unable to connect to the database. To troubleshoot, from the remote computer I tried connecting with the management program and I get the Error 26 unable to connect.
(The connection string worked previously (yesterday) when using MSDE as the server. When I installed SQL Express I named it the same instance as the server name under MSDE. I also use server authtication on both with same user name and password. As stated below I cannot connect using the managment console.)
Here is what I have done: I made sure that the SQL Server configuration has been changed to allow network connections (both TCP and named pipes). I have disable windows firewall on both machines. I confirmed that I can connect from the remote machined to the server by network browsing. Both machines are running XP Proff. There is no other security software running on either machine.
More Info. when attempting to log on I am using the server authntication, I use "sa" as the user id plus my password.
Goal. The front end of database program connects to the server remotely using a program called Hamachi over the internet. This works without a problem on MSDE. But for now I am simply try to connect using the managment program which lets you browse for other serves. When I do this it shows the remote computer, but not the name of the computer but not the SQL server which I type in like the following: "INTELsql1"
What I have not Done: I have not changed any permissions or added any users to the server, since this does not seem necessary. As stated the user of remote machine can connect to the server and change files.
Would appreciate any suggestions or tips. Thanks.
I HAVE READ THE POST FROM MAY 13, 2007 AND TAKEN ALL STEPS SUGGESTED EXCEPT MAKING SURE THE BROWSERS SERVICE IS RUNNING ON SERVER WHICH I WILL DO NOW.
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Aug 16, 2005
Hi,I am getting the following error (When i am trying to update the column thru windows service) Please let me know the solution for the following.The following error is comming only when i set CommandTimeout to infinity (Commandtimeout=0).General network error. Check your network documentation. Number 11 Procedure ConnectionRead (recv()). Class 20 State 0 Source .Net SqlClient Data Provider Server Line number 0 Thanks and Best RegardsNagaraju A
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Sep 13, 2007
Hey all.
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: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)
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Mar 12, 2007
I have a visual basic 2005 application where I am storing some data in a Sequel Server Database. It's my first attempt using SQL Server. It was developed on my machine and the database is on my local hard drive.
It was put onto an industrial PC and shipped last December (the vb app is an HMI).
Our service guy is installing the machine and asked for some changes to the VB screens. I ran my app (on my computer) and it crashed when I selected the screen where I use the db.
So I decided to look at the database using Visual Basic and I get the following error:
Microsoft Visual Basic 2005 Express Edition
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: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)
I then tried to create a new database via Visual Basic and get the same error. My boss has it installed on his machine. Same error there. These are both machines that had no problem back in December!
I also have a industrial PC on my desk to test my app and it STILL WORKS there. That one though is not connected to the internet and hasn't gotten any updates or changes or whatever since I last had it on in December. I don't know if it was a windows update or a network change? But as I said, I'm not connecting remotely - SQL Server and the db are on our local machines.
Interesting enough, if I go to the control panel | Administrative Tools | Services, SQL Server (SQLEXPRESS) is set to automatic and is NOT started. I attempt to start it and get an error
Services
Windows could not start the SQL Server (SQLEXPRESS) on Local Computer. For more information, review the System Event Log. If this is a non-Microsoft service, contact the service vendor, and refer to service-specific error code 3417.
I am lost.
Thanks in advance for any help!
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Jun 18, 2007
On my computer (WinXP En Prof SP2) I have installed SQL Express 2005 with instance name "SQL2005". Mixed Mode.
I allowed Remote connection to this DB server, enabling TCP/IP protocol on port 1433.
Also SQL Browser is set to autostart.
My firewall is off.
When I try to connect to this server through the CMDline, I use:
sqlcmd -S testpcsql2005 -U sa -P test
I only get: "Sqlcmd: Error: Microsoft SQL Native Client: Client unable to establish connection due to prelogin failure"
If I use:
sqlcmd -S testpcsql2005 -U sa -P asdfghjkl (or any password)
the result will be the same.
If I try to connect to the server through the Management Studio, I just get:
"A connection was succesfully established with the server, but then an error occurred during the login process. (provider: TCP Provider, error:0 - An existing connection was forcibly closed by the remote host.)(Microsoft SQL Server, Error: 10054)"
or
"A connection was succesfully established with the server, but then an error occurred during the login process. (provider: TCP Provider, error:0 - An established connection was aborted byt the software in your machine.)(Microsoft SQL Server, Error: 10053)"
Next I have installed the new DB on new computer (WinXP En Prof SP2) with the same options (using unattended installation in CMD line) and on this computer it works. It means, that I can establish remote connections to that server with any problems.
I have search on internet to solve this problem bud a I didn't find the solution. I found, that this error relates to winsock layer - WSAECONNABORTED(10053) and WSAECONNRESET(10054) error codes.
But I still don't know, how to solve this and remotely connect to my DB Server...
Thanks for your answers.
Edit 1:
I have tried to uninstall MS Net Framework 2.0, Microsoft SQL Native Client, Microsoft Support Files.
When I try localy connect - it doesn't work, of course.
When I try remotely connect:
"sqlcmd -L" shows, that exists "testpcsql2005"
"sqlcmd -S testpcsql2005 -U sa -P asdfghjkl" (or any password) generate the same Error as before - nothing changed
Is it problem of MS SQL Server or MS Windows? How to solve this?
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Jan 11, 2008
Help! My web-application worked fine last week. I have made some enhancements and it still works fine when I test in locally in VS 2005 and from IIS when I allow unauthenticated users (by commenting out "<deny users="?"/>" in my web.config. However, with not allowing unauthenticated users, I get redirected to a login application (which also worked last week), where I supply one of several user names and passwords and it is supposed to redirect me back to my default.aspx page. Only, now it is taking the authentication parameters from the login screen but is not redirecting me back to my app's page and instead is putting up this Error 26 that states SQL Server 2005 does not allow remote connections.
The included stack trace has no information about what server it seems to be trying to connect with, but the strangest thing about it is I/we are not using SQL Server 2005 yet (still a future upgrade not too far off). The application database, the authentication aspnetdb database, and the Session aspstate database are all on the same SQL Server 2000 managed server. And, these were all working last week (and are all accessible). I have not changed any connection strings and as I said, it works fine without the loging in part both locally and from IIS. It is only when using the Login in application, which is working with other apps and the developer insists the problem has to in my application (after all the first line of the error message states: Server Error in '/deployment1' Application, which is my app!)
I am lost in finding the culprit, can someone please give me some ideas?
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Feb 15, 2008
Hi,
I have a problem when updating tables in a SQL Server 2000. I am able to make a select form tables but I can't insert data. I got this error :
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: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
SQLExpress database file auto-creation error:
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Jun 3, 2008
plz help me...
when establishing a connection to the server. when connecting to server 2005, this failure may be caused by the fact that under the default setting SQL Server does not allow remote connections.(provider: Named pipes provider, error:40 - could not open a connection to sqlserver)
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Jul 22, 2005
I am getting this error in Enterprise Manager:
TCP Provider: An existing connection was forcibly closed by the remote host.
But, my web app can still connect just fine to the db, so it's still in
the same place with the same login/password. And my registration
in EM was working just fine (for years) until yesterday I got this
error. I've tried deleting the registration and re-creating it
but the same thing. What could have gone wrong to cause this to
happen?
Thanks for any pointers, I have no idea where to start looking on this one, the host says they haven't changed anything...
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Jan 2, 2007
OS: Win 2003 Service Pack I on 2 boxes
SQL: SQL Server 2005 Clustered System
Situation: I have created a maintenance plan to backup my transaction log every hour. This runs fine for some time and then later that day it stops working. This could happen at any anytime, and I end up having to manually kick it off again. I read the SQL error logs and this is what it points to:
[298] SQLServer Error: 2, Named Pipes Provider: Could not open a connection to SQL Server [2]. [SQLSTATE 08001]
[165] ODBC Error: 0, Login timeout expired [SQLSTATE HYT00]
[298] SQLServer Error: 2, 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. [SQLSTATE 08001]
[382] Logon to server 'JAXNVSQL1CLS' failed (ConnAttemptCachableOp)
[177] Job MaintenancePlan Insight Transaction Logs has been requested to run by Schedule 10 (Insight Transaction Log Backup)
[165] ODBC Error: 0, Login timeout expired [SQLSTATE HYT00]
I have already used SAC to confirm that remote connections is enabled using TCP/IP and Named Pipes. I have used the server configuration tool as well to check this. I have used the Studio Management and checked on the remote connections as well.
I know these protocols are enabled and working because I have used the Studio Management to check on the activity connections type and seen both are working. Plus the fact this maintenance plan does work, it just so happens something causes it later to fail. When this does fail, I log onto the server but can not login using the Studio Management , I get [298] errors. I can login using the Studio Management on my laptop remotely but can not manually kick off the maintenance plan. I end up having to log on to the server and restart the MSSQL Server service and manually kick off my plans. (By the way these services do not show shutting down in the Windows event viewer). After restarting the MSSQL Server service and manually executing the maintenance plan everything is fine until the next time it hits a glitch.
I do have SQL Browser up and running, all of the MSSQL services running, I need some help as to what may be causing this problem!!!!!!!!! HELP!!!!! I am losing my mind!!!!
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Apr 29, 2006
We are getting a problem when the below error Log
Server: SQL Server 2005 and SP1.
Then, All the Web Servers will drop all connections and stop the network service. Later, the network service will start up automatically but all the before service is dropped.
We would like to know the error coming from?
Error Log
================
TCP Provider, error: 0 - An existing connection was forcibly closed by the remote host
Event Type: Warning
Event Source: ASP.NET 2.0.50727.0
Event Category: Web Event
Event ID: 1309
Date: 4/29/2006
Time: 10:48:47 AM
User: N/A
Computer: 88DBWEB0
Description:
Event code: 3005
Event message: An unhandled exception has occurred.
Event time: 4/29/2006 10:48:47 AM
Event time (UTC): 4/29/2006 2:48:47 AM
Event ID: 77910e6688484582bb1c29808feef883
Event sequence: 128
Event occurrence: 13
Event detail code: 0
Application information:
Application domain: /LM/W3SVC/24978983/Root/ph-3-127907437121075328
Trust level: Full
Application Virtual Path: /ph
Application Path: D:DB88ph
Machine name: 88DBWEB0
Process information:
Process ID: 1568
Process name: w3wp.exe
Account name: NT AUTHORITYNETWORK SERVICE
Exception information:
Exception type: SqlException
Exception message: A transport-level error has occurred when sending the request to the server. (provider: TCP Provider, error: 0 - An existing connection was forcibly closed by the remote host.)
Request information:
Request URL: http://88db.jobsdb.com/ph/Views/MediaUpload.aspx?PostID=50202&Type=I&panelid=postimagediv
Request path: /ph/Views/MediaUpload.aspx
User host address: 192.168.10.10
User: 50077
Is authenticated: True
Authentication Type: Forms
Thread account name: NT AUTHORITYNETWORK SERVICE
Thread information:
Thread ID: 15
Thread account name: NT AUTHORITYNETWORK SERVICE
Is impersonating: False
Stack trace: at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj)
at System.Data.SqlClient.TdsParserStateObject.WriteSni()
at System.Data.SqlClient.TdsParserStateObject.ExecuteFlush()
at System.Data.SqlClient.TdsParser.TdsExecuteRPC(_SqlRPC[] rpcArray, Int32 timeout, Boolean inSchema, SqlNotificationRequest notificationRequest, TdsParserStateObject stateObj)
at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method)
at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method)
at System.Data.SqlClient.SqlCommand.ExecuteReader()
at System.Web.SessionState.SqlSessionStateStore.DoGet(HttpContext context, String id, Boolean getExclusive, Boolean& locked, TimeSpan& lockAge, Object& lockId, SessionStateActions& actionFlags)
Custom event details:
For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
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Sep 30, 2004
Hello all,
We have a Windows 2003 Web Edition server serving a site through IIS. It connects to a Windows 2003 Standard Edition server running SQL 2000 SP3a.
This site receives the following error as seen in the topic:
[DBNETLIB][ConnectionRead (recv()).]General network error. Check your network documentation.
We've configured the server network utility to only allow TCP/IP connections. The connection string for the site is as follows:
<%
' FileName="Connection_ado_conn_string.htm"
' Type="ADO"
' HTTP="false"
' Catalog=""
' Schema=""
MM_connSpankMSSQL_STRING = "Provider=sqloledb;Data Source=SERVER_IP,1433;Network Library=DBMSSOCN;Initial Catalog=ourmaindb_1;User ID=ourmaindb_1;Password=hotcookies;"
%>
Any ideas or tips on solving this issue? We've noticed it is due to larger queries as smaller ones do work with no problems.
The servers are behind a BSD box running iptables, has 1433,1434 along with standard web ports wide open. Anything outbound is allowed.
Some further testing via ODBC on the IIS server improved things. No more connection pooling for the SQL Server driver allows for 1/3 of the query to run. Still 2/3s of it doesn't show up, and that general network error message appears.
Should have 330 rows if it works right.
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May 19, 2004
Hi
While running a DTS, many times the error message: "[DBNETLIB][ConnetionWrite (WrapperWrite()).]General network error. Check your network documentation." appears.
Does somebody knows why?
I am running the DTS from a computer (not the server where the DTS is stored) and it is connected without any problem when this happens.
Thanks!!
Regards
Lautaro - Argentina.
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Oct 4, 2007
Hi Every one,
I am using .Net 1.1 for my web application.
And my database server is SQL Server 2005.
My application is running fine, as i can login to it and also able to view pages. But when i open Order management(having 3K records) its give me error,
General Network Error. Check your network documentation
I have also searched many articles and tried following solutions but nothing working
- connectiontimeout = 0, max pool size = 7500/100, pooling = false
- SSL disabling enforce security false as mentioned in microsoft kb article.
And there's nothing any issue with hardware/firewall as my application's login and other forms are working fine(which use same database with same connection string)
Can any one please help me to solve this error?
With Regards,
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