I have a web-application which is reciving the following while trying to connect to a database hosted on another server.
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: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)
Now, there problem here is that the connection strings, and the server paths area all perfect.
The site run correctly when run via cassini, on my local machine. (Connections strings are correct.)
Other sites hosted on the same server are able to access the databse. (Server paths ara all active.)
While the error says it's been unable to connect, Activity Monitor is aware of the query, and the Server Logs show no error. (Just odd.)
Google & Bing have massively failed with this, so I guess it's time to hit the Stack!
Open the Sql Server Conifguration Manager, expand Sql Server 2005 Network Configuration, click Protocols for <Yourserverinstance>, then check TCP/IP is enabled.
Related
I'm trying to use POCO to connect to my database.
Whenever I try to connect, I get this error:
Failed to load provider "System.Data.SqlClient".
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: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)
NOTE: it's a local database, and remote access is enabled, TCP/IP is enabled, and the SQL Server service is running.
I'm using .NET Core 7
Can anyone tell me how to solve this?
Thank you all
I'm trying to connect to an SQL database hosted on Azure from a function app I'm building in Visual Studio but I'm getting the following error:
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 - An attempt was made to access a socket in a way
forbidden by its access permissions.)
I can connect from the same PC using SSMS without a problem. I've tried connecting to the database using data connections in server explorer in VS but I'm getting the same error. If I connect to Azure with my account in server explorer it shows me a selection of services including SQL databases but there are none listed underneath although my account does have access to the database.
Are there any hidden gotchas I'm missing or settings within VS? I've also tried adding my client IP in the firewall settings but that didn't make a difference either.
After doing some more testing it turned out to be the client firewall that was blocking VS and VS Code from connecting to Azure SQL. It seems there was already an exception for SSMS.
The error message states "Verify that the instance name is correct"
It could be that the SSMS is automatically creating a fully qualified name once you say that it is an azure database.
If you use the short name from Visual Studio, then you cannot connect to the SQL server.
For example "myserver.database.windows.net" versus "myserver".
Anyone have an idea how to solve this problem?
A network-related or instance-specific error occured while establishing a connection to SQL Server. The server was not found or was not accessible.
Verify taht the instance name is correct and that SQL Server is configured to allow remote connection. (provider: SQL Network Interfaces, error: 26 - Error locating Server/Instance specified)
Thanks in advance!
Make sure the instance of the server is started. Do this from Start Menu-> Microsoft SQL Server... ->Configuration Tools->SQL Server Configuration Manager->SQL Server Services
If it is not on your local machine, i.e. on a remote server, then your account needs a login on the SQL Server that is granted access to the DB you are trying to connect to.
Usually the local server instance by default is installed with access for yourself. But it doesn't hurt to check.
Also if it is remote, can others connect successfully? If not, then you may also need remote connections enabled on SQL Server.
Making sure you have the name of the instance correct is important. Slashes should be back slashes, not forward slashes. What are you using for the instance name?
I am working with Microsoft Visual studio Test, I do not know how to deal with the following error
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: SQL Network Interfaces, error: 26 – Error Locating Server/Instance Specified)
Make sure your database engine is configured to accept remote connections
Start > All Programs > SQL Server 2005 > Configuration Tools > SQL Server Surface Area Configuration
Click on Surface Area Configuration for Services and Connections
Select the instance that is having a problem > Database Engine > Remote Connections
Enable local and remote connections
Restart instance
Check the SQL Server service account
If you are not using a domain account as a service account (for example if you are using NETWORK SERVICE), you may want to switch this first before proceeding
If you are using a named SQL Server instance, make sure you are using that instance name in your connection strings in your ASweb P.NET application
Usually the format needed to specify the database server is machinename\instancename
Check your connection string as well
4.You may need to create an exception on the firewall for the SQL Server instance and port you are using
- Start > Run > Firewall.cpl
- Click on exceptions tab
- Add the sqlservr.exe (typically located in C:\Program Files (x86)\Microsoft SQL Server\MSSQL.x\MSSQL\Binn), and port (default is 1433)
- Check your connection string as well
If you are using a named SQL Server instance, make sure you are using that instance name in your connection strings
Check SQLBrowser; check that it is running. You may also need to create an exception in your firewall for SQLBrowser.
Check that you have connectivity to the SQL Server. Note what you are using to connect: machine name, domain name or IP address? Use this when checking connectivity. For example if you are using myserver
Start > Run > cmd
netstat -ano| findstr 1433
telnet myserver 1433
ping -a myserver
Check what ports are IP addresses are being returned.
Alternative:
If you still can’t get any connection, you may want to create a SQL account on the server, a corresponding SQL user on the database in question, and just use this username/password combo in your web application.
Credits for this answer goes to belle of sqlmusings.com
been trying to configure an ADO.NET connection for my Visual Studio application but I am running into issues and having no luck at all troubleshooting them. The major error that I run into is:
A network-related or instance-specific error occurred while establishing a connection to SQL server. The server was not found or not accessible. Verify the instance name is correct and that SQL server is configured to allow remote connections (Error 40: Could not open connection to the SQL server)
The steps I undertook to troubleshoot this are:
1. Open up Sql server configuration manager and under the SQL Server Network Configuration, Protocols for MSSQLSERVER,SQLExpress, SQL server 2008 connection string data source I enable each of the protocol names (Shared memory, Named pipes,TCP/IP,VIA)
As instructed I stop the SQL server services first under the SQL server services nodes.
Now I click start, MSSQL server service starts but both SQL Server 2008 and SQLEXPRESS agents do not. Stating the following:
The request failed or the service did not respond in a timely fashion. Consult the event log or other applicable error logs for details
This might just be the problem as when I attempt to create the connection string , the server name specified is MYWORLD/SQL SERVER 2008. Since the SQL server 2008 agent service refuses to start, the connection fails, leading to the first error message.
Does anybody have any leads on this and can let me know the necessary steps to mitigate this.
The SQL Browser service must be running to connect to a named instance.
Use SQL Servr Configuration Manager under Configuration Tools under Microsot SQL Server 2008 to assign the logon accounts for each service you want to run. Do NOT use any other method to assign user accounts because the correct rights will not be enabled.