I've searched to force the Encrypt connection from client SSMS to AWS RDS SQL Server since yesterday, but I nerver found what I'd like to achieve : launch ssms with Encrypt connection box checked.
The command line ssms.exe dose not contain this option and the CONFIG File Ssms.exe.config seems not having an connection element neither.
Anyone has some idea?
Thank you for helping
While trying to connect to SQLAnywhere (Sybase) database (C# code) from Azure ServiceFabric:
await using var connection = new SAConnection(connectionString);
await connection.OpenAsync();
receive iAnywhere.Data.SQLAnywhere.SAException
Connection error: Connection was dropped (may not be a SQL Anywhere server)
Error code is Error 832. This is generic connection error: An error occurred while attempting to establish a connection with the database server, but before attempting to connect to a database. Failure to initialize a communication link during the connection attempt is an example of this error. Creating a debug log file using the LogFile connection parameter may provide more information.
Locally it works, but does not work from Service Fabric.
Fix ideas tried:
Missing driver? Looks like no, Sybase (now SAP) SQLAnywhere requires special driver or client - but locally also works without this driver, just with iAnywhere.Data.SQLAnywhere.NETCore nupackage installed
Network connection/ firewall problems? Looks like no, database server can be pinged from Service Fabric node
It was another traffic protection tool. Although it was possible to telnet the port, still traffic from app was blocked by another tool.
Had a similar issue - turned out that whilst standard incoming traffic from the Sybase Server had been whitelisted in our Firewall, encrypted traffic from this had not been.
This meant I could ping and connect with Telnet, but got the same error when trying to log-in with my credentials
Connection error: Connection was dropped (may not be a SQL Anywhere server)
Our comms team solved the issue by whitelisted encrypted traffic from the server address as well. They also mentioned it possibly could have been solved we shared a valid security certificate for the encrypted data with their team, but were happy with the first course of action.
I am using SQL managment studio 2008 running on an Amazon EC2 machine. I am unable to connect to the database in my asp.net application. The EC2 instance has been set to accept connections over the SQL port. I am also able to remote the machine as well as view websites hosted on the server. Listed below is part of the connection string relating to this instance. When the program is ran and this connection string is called, it returns tcp error 0 - no return response. it just times out.
<add name="ProjectServer" connectionString="Data Source=*IP ADDRESS HERE*,1433;Initial Catalog=*Catalog Name*;User ID=IP-0A6ED514\Administrator;"/>
I removed the ip and the catalog name for the example, but I am sure they are correct.
The only thing that I could think may cause an error, is the differences in names between the user id and the server name - the server name is ip-0A6ED514\sharepoint but the user name is ip-0A6ED514\administrator when I log into the sql server manager on the EC2 instance. A password is not used. Not sure if I would need to leave in a blank string for password - also not sure if the difference between server name and user id to log in makes a difference. Any help is appreciated. Thank you.
update - when this connection string is used with out the port, i get tcp provider error 40 - when the port is in there, i get error 0
edit- the sql server is using windows authentication - does this make a difference? Usually I always use SQL server authentication
edit 2- now running sql express at same location, would i need a \SQLEXPRESS tag? I feel like after looking around and what could be the error, it is that I am reaching the machine ok, but its not pointing me to the DB, any suggestions?
I try to connect to remote SQL Server 2008 Express database from my ASP.NET web application but error throws:
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)
How to resolve that problem. Thanks!
Here's the first thing to check. By default Express only has the shared memory protocol enabled. You'll need to enable TCP/IP protocol for the service (SQLEXPRESS). You do this through the SQL Server Configuration Manager.
Also since Express is a named instance, you'll need to ensure that the SQL Server Browser service is started.
Make sure your connection string is correct. When you are hitting a named instance (SQLEXPRESS in this case) you need to have the data source as yourServer\sqlexpress.
And not to mention, make sure you can ping the box that houses the instance.
Check those things out and let me know if that still doesn't fix it.
i thing your connection string is not correct. Also check a named instance you try to data source as IPaddress\sqlexpress. Like 000.000.000.000\SqlExpress
What is the problem below?
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)
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: 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)
How can this be solved?
All Programs >> Microsoft SQL Server 2008 >> Configuration Tools >> SQL Server Configuration Manager >> SQL Server Services, and check if SQL Server service status is “Running”.
Seeing as this result is second in Google when searching for:
Server is not found or not accessible
I'll add to this post. Colleague of mine has search for an entire day on this problem, checking his connection string and double checking his code. He could connect to the server using SQL but his application wouldn't connect.
Turns out he was running his application from a network share. Network shares only have partial trust and will produce this misleading exception as a result.
Move the project to your local drive and try again. Hope this helps someone!
We were getting this intermittently on our .NET website which accesses an SQL Server database on another server. I tried several things, including making sure I was closing all SQLConnections and recycling applications pools more frequently. These helped some but the problem still occurred from time to time. What it turned out to be was a DNS issue.
I resolved it by changing the connection string Data Source value from a domain name to an IP address, e.g from:
Data Source=My-SQL-Server;Initial Catalog=database-name;Integrated Security=true
to
Data Source=10.1.2.237;Initial Catalog=database-name;Integrated Security=true
This means pretty much exactly what it says. For some reason the computer the code was running on could not communicate with the SQL Server. This could be caused by a lot of things: Firewall issues, DNS/Name resolution, SQL Configuration (not configured to accept TCP/IP connection). Just to name a few.
You need to restart the MS SQL service. Please follow these steps:
1- Press window sign + R to open Run Window.
2- Type services.msc and press Enter.
3- Look for SQLSERVER(MSSQLSERVER) in the services list.
4- Right click on that service and choose REFRESH or START.
Hopefully it works.
Just go through following steps:
All Programs
Microsoft SQL Server 2008 R2
Configuration Tool
SQL Server Configuration Manager
A pop up will open click on yes.
Select Sql Server Services (At left side) and Make sure status is running for all services (At right Side)
One thing you can try is to open server explorer in Visual Studio.
Click Connect to database.
The datasource will be Microsoft SQL Server Database file. Click ok
Type in the Database file name or click Browse...
Click Test Connection and make sure it works.
If it does...click on the Advanced.. button.
Copy the Data Source text at the botton of the screen.
Almost everytime I see this error I was trying to use an instance name something like "long_pc_name/MSSQLExpress" (this is what shows up in MSSMS)
And every time it just needs to be "(LocalDB)\MSSQLLocalDB".
If your connection string is pointing to a local db...
connectionString="Data Source=(localdb)\
Server=localhost\SQLEXPRESS;Database=
Another cause of this error is: you might not have Sql Server installed in your system.
Download Sql Server Express here:
https://www.microsoft.com/en-us/download/details.aspx?id=55994
Install it and try again.
You can use this connection string to connect to it:
Server=localhost\SQLEXPRESS;Database=master;Trusted_Connection=True;
Your local server name is localhost\SQLEXPRESS.
Replace database with your database name.
Refer to this post if you still have trouble connecting:
Why am I getting "Cannot Connect to Server - A network-related or instance-specific error"?
I was trying to run the MVC Movie tutorial but I had the error in question. So I created a new MVC project and copied its connection string and used that to replace the one in the tutorial. Basically, replace this:
Data Source=(LocalDB)\v11.0
With this:
Data Source=(LocalDb)\MSSQLLocalDB
For all connectionString properties.
Go to SSMS and check if the SQL server is accessible there.
Try to replace domain name by IP address. Check if you have sufficient authorization,and other requirements fulfilled.
Try to check LAN connection and VPN connection, if required.