error:26 when connecting to sql server express...

I've got an ASP.net 2.0 application that I published and moved to a publicly available server. From my machine it works fine, but not from the production machine.

I'm attempting to connect to a machine that has sql server express installed.

The message in the browser:

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)

So, I went by the kb article and made sure tcpip is enabled. This uses port 3288. server browser is enabled and the machine accepts remote connections.My connection string is (minus the ip & user/pwd):

<add name="IRRMAConnectionString" connectionString="Data Source=<ip_address>\SQLEXPRESS,3288;Initial Catalog=IRRMA;User ID=<user>;password=<pwd>" providerName="System.Data.SqlClient"/>

I can ping the db server from my app server. On my dev machine it connects. Windows firewall is turned off on the db server.

This seems to be an issue with a firewall, I think?

Any direction would be appreciated.

Thanks,

Scott Jones

Scott@.fourindianajones.com

You should check this out and go from there.

http://blogs.msdn.com/sql_protocols/archive/2007/05/13/sql-network-interfaces-error-26-error-locating-server-instance-specified.aspx

I would say it has to do with the UDP 1434 or the sqlbrowser.exe in the exceptions. But once you follow all the steps you should get closer to the resolution.

error:26 when connecting to sql server express...

I've got an ASP.net 2.0 application that I published and moved to a publicly available server. From my machine it works fine, but not from the production machine.

I'm attempting to connect to a machine that has sql server express installed.

The message in the browser:

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)

So, I went by the kb article and made sure tcpip is enabled. This uses port 3288. server browser is enabled and the machine accepts remote connections.My connection string is (minus the ip & user/pwd):

<add name="IRRMAConnectionString" connectionString="Data Source=<ip_address>\SQLEXPRESS,3288;Initial Catalog=IRRMA;User ID=<user>;password=<pwd>" providerName="System.Data.SqlClient"/>

I can ping the db server from my app server. On my dev machine it connects. Windows firewall is turned off on the db server.

This seems to be an issue with a firewall, I think?

Any direction would be appreciated.

Thanks,

Scott Jones

Scott@.fourindianajones.com

You should check this out and go from there.

http://blogs.msdn.com/sql_protocols/archive/2007/05/13/sql-network-interfaces-error-26-error-locating-server-instance-specified.aspx

I would say it has to do with the UDP 1434 or the sqlbrowser.exe in the exceptions. But once you follow all the steps you should get closer to the resolution.

error:26 Error Locating Server/Instance Specified

I am having trouble connecting to Sql Server 2005 Express from asp.net
2.0 app on Windows Server 2003. I am using Sql Server Authentication,
and I tried the below article's suggestions a number of times. When I
login to to the machine, and login, I am able to get authenticated.
However, when I debug my application, I get the error below. Do I have
to give the sql server authenticaed account I created certain
permissions? Whould I set a port, and use the ipaddress rather than
the server name? Any suggestions would be greatly appreciated.
http://support.microsoft.com/kb/914277
My 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)
My Connection String:
<add key="ConnectionString"
value="server=MyServerName;uid=MyUserName;pwd=MyPasswd;database=MyDB"/>On Feb 1, 5:20=A0pm, carlos <carlosubu...@.gmail.com> wrote:
> I am having trouble connecting to Sql Server 2005 Express from asp.net
> 2.0 app on Windows Server 2003. I am using Sql Server Authentication,
> and I tried the below article's suggestions a number of times. When I
> login to to the machine, and login, I am able to get authenticated.
> However, when I debug my application, I get the error below. Do I have
> to give the sql server authenticaed account I created certain
> permissions? Whould I set a port, and use the ipaddress rather than
> the server name? Any suggestions would be greatly appreciated.
> http://support.microsoft.com/kb/914277
> My 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)
> My Connection String:
> =A0<add key=3D"ConnectionString"
> value=3D"server=3DMyServerName;uid=3DMyUserName;pwd=3DMyPasswd;database=3D=MyDB"/>
Update:
I changed the connection string to use the ipaddress, and a port that
I set in the TCPIP settings, and now i'm getting the below 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: TCP Provider, error: 0 - No connection could
be made because the target machine actively refused it.)
I'm thinking this may be a permission problem'|||Hi Carlos,
By default, SQL Server 2005 Express, Evaluation, and Developer editions
allow local client connections only. Enterprise, Standard, and Workgroup
editions also listen for remote client connections over TCP/IP.
you ned to enable Remote Connections option using
Surface Area Configuration for Services and Connections (Remote Connections)
- Database Engine
You must restart the Database Engine instance's service to apply changes.
Regards,
Amol R. Lembhe
"carlos" wrote:
> On Feb 1, 5:20 pm, carlos <carlosubu...@.gmail.com> wrote:
> > I am having trouble connecting to Sql Server 2005 Express from asp.net
> > 2.0 app on Windows Server 2003. I am using Sql Server Authentication,
> > and I tried the below article's suggestions a number of times. When I
> > login to to the machine, and login, I am able to get authenticated.
> > However, when I debug my application, I get the error below. Do I have
> > to give the sql server authenticaed account I created certain
> > permissions? Whould I set a port, and use the ipaddress rather than
> > the server name? Any suggestions would be greatly appreciated.
> >
> > http://support.microsoft.com/kb/914277
> >
> > My 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)
> >
> > My Connection String:
> > <add key="ConnectionString"
> > value="server=MyServerName;uid=MyUserName;pwd=MyPasswd;database=MyDB"/>
> Update:
> I changed the connection string to use the ipaddress, and a port that
> I set in the TCPIP settings, and now i'm getting the below 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: TCP Provider, error: 0 - No connection could
> be made because the target machine actively refused it.)
> I'm thinking this may be a permission problem'
>