I'm trying to connect to a remote SQL Server 2005 db from a .NET Windows service running in Vista Home Premium x64. I can access the remote db from a console app with no problem. I can connect to a local db from the Windows service with no problem. I was able to connect from a service from XP with no problem. There's no firewall or anti-virus running. How do I configure this service to be able to connect to the remote db?
I've tried to connect by running the Windows service as a local admin account, LocalSystem, LocalService, and NetworkService.
The connection string:
Data source=SERVER_NAME;Initial Catalog=DB_NAME;Integrated Security=True;
The 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: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)
MORE INFO:
I have also tried to connect using SQL Server authentication with no success:
Data Source=SERVER_NAME;User ID=USER_ID;Password=PWD;Initial Catalog=DB_NAME
This connection string works from the console app too.
MORE INFO:
I ran Process Monitor for the Windows Service and the console app. The Windows service showed \SERVER_NAME\pipe\sql\query was ACCESS DENIED but the console app showed SUCCESS when reading/writing files to \SERVER_NAME\pipe\sql\query.
Good Lord! Why all the gibberish and complex responses on this site. Create a User Account
Either local or Domain and set the service to use that account. Then go into your SQL Server and Add you new account to the Database and set permissions. Voila!
Oh yeah, dont plague yourself with SQL Authentication. Integrated Security is much easier to maintain and without a password in your web.config your much safer.
1) open a command prompt. Type "ping SERVER_NAME". Does it respond? You may have a DNS or connectivity issue if this doesn't work.
2) "telnet SERVER_NAME 1443". Do you see anything or does it refuse your connection? This will definitively tell you whether or not someone is listening on the other end.
3) Go into SQL Server Management Studio. Right click Properties of your server. Select "Connections" from the left side. Is "Allow Remote Connections" checked?
4) Since you're running using network service/system, you will need to make sure you have a login configured on your server for the machine account DOMAIN\CLIENTSYSTEMNAME$. Note the $ sign. This is your machine account, and this will be the user that SQL Server will see.
Related
I have two Win 7 64 bit machines.
On the first one I have installed SQL Server 2008 R2 Express and have no trouble connecting via Management Studio with Windows Auth and also via SQL Auth with a user I set up on the database.
On the second machine I am trying to connect to the database on machine 1 using Management Studio. I'm trying SQL Auth. I therefore obviously also can't connect to it via connection string in my .NET Code
I can ping the first machine from the second.
Things I have tried include the following:
On the machine the database is installed make sure the firewall is allowing connection on Port 1433
Made sure SQL Server service is running
Made sure SQL Server Browser service is running
Created an exception for sqlbrowser.exe in the firewall
Enabled TCP/IP Protocol through SQL Configuration manager
Allowed Remote connections in SQL Server Management Studio
The error I get is:
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
This is the connection string I use in code
Data Source=xxx.xxx.xxx.xxx\sqlexpress;Initial Catalog=dbName;User Id=myUser;Password=myPassword;
This can be caused by a number of reasons but I'm glad my suggestion about checking firewall ports (rather than just allowing a one-way exception for SQL Browser) led you to the answer: the firewall wasn't allowing the correct port # through.
If i remember correctly SQL Server disables remote connections by default.
Please check whether remote connections are enabled and enable them if not:
RMB on Server in Management Studio Object Explorer -> Properties -> Connections -> Allow remote connections...
Windows application is set to connect to the SQL Server using SQL Server authentication.
When I RDP to the box where the application resides and start the application, it successfully connects to the SQL Server.
When a customer runs the application on his desktop (he is on the network with the application box) and starts the application, connection fails (error. Server does not exist or access denied).
The customer can ping the SQL Server IP in his command prompt.
Yet, when I look at the error log on the SQL server I don't see the logs of his failure to connect.
What could be blocking his access to the SQL Server?
You may have to enable the TCP/IP protocol in SQL Server Configuration Manager - it's disabled by default.
I am unable to connect to my SQL Azure database instance remotely using SQL Management Studio 2012. Firewall exception is in there for my local IP. I can connect successfully and admin the database using the browser based management link in my Azure account.
I just can't seem to connect to the database via SSMS or anything else like VS2012.
Here is the format I'm for my connection in SSMS:
Server Name: myservername.database.windows.net
Authentication: SQL Server Authentication
Login: myusername#myservername
Password: my-password
Connect to: (i've tried) "master", mydatabasename, <default>
Encryption: TRUE
Once again, I DO have the firewall rule active for my local IP address on the server instance of my Azure account.
When I attempt to connect, I receive this error:
A connection was successfully established with the server, but then an
error occurred during the pre-login handshake. (provider: SSL
Provider, error: 0 - the wait operation timed out.) (Microsoft SQL
Server, Error: 258)
When searching for that 258 error, I do not get many results related to SQL Azure. I appreciate any help.
Error 258 is generated due to some of the configuration within your machine if a secure network could be established between two endpoints and if one machine initiate secure channel. This problem could be very much machine specific and not SQL specific that why you did not find any resources on this regard.
Can you try using SQLCMD as described in the following troubleshooting guide and see if that works to isolate SSMS specific issues on the same machine:
http://social.technet.microsoft.com/wiki/contents/articles/1719.windows-azure-sql-database-connectivity-troubleshooting-guide.aspx
IF you capture and analyze network packets traffic you might be able to determine the root cause of connectivity error.
I might be the million'th person posting about this, but others' solutions haven't helped me. I have a database on Microsoft SQL Azure. I an trying to connect to it using the Visual Studio 2010's "Connect to Database" Tool.
From my Windows 7 machine, I can connect to it very easily. But from my Windows Server 2008R2 machine i am getting the classic 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: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)
All the posts around the web seem to be focussing on the problems on the server side, no one cares if the client goes rogue. :(
Thanks for the replies.
I have seen similar problems with VS2010 DB Tool and Windows Server so I would not suggest try using SSMS 2008 R2 (must be R2). Once you have download SSMS 2008 R2 and configured properly to work on Windows Server it sure will work. In most of the case you really need to open SSMS settings to get it workon on Windows Server.
Next a few points to check:
Verify that the telnet is working from your Windows Server Machine:
c:>telnet _your_sqlazure_database_name.database.windows.net 1433
Disable your real time security and the try again
Finally following the link to keep applying settings in your Windows Server and SSMS which are applicable and I am sure it will work:
http://www.mssqltips.com/sqlservertip/2340/resolving-could-not-open-a-connection-to-sql-server-errors/
One issue is that you need to connect via tcp, not named pipes (per your error message).
Are both servers behind the same firewall (e.g. the same external IP address)? The SQL Azure firewall needs to be configured to allow access from remote IP addresses.
I have installed SQL Server 2008 R2 Express on a Windows Server 2008 R2 machine, and now when I want to open that database using SQL Server Management Studio on the client machine it fails to open.
But the database opens normally on the server.
The owner of the database is sa and on client I am logged in with windows authentication.
How to resolve this error??
the server priciple smtech/prabhu is not able to access the database
the user is of client under the server domain
I suggest making sure that the account you are trying to connect with actually has access.
Log onto the server, open up management studio, look in object explorer. There should be a Security folder icon in the treeview, Expand that and the Logins folder.
If the user you are trying to connect with isnt present you may need to add it.
Other than this instead of connecting with windows authentication maybe try connect with SQL Server Authentication as the SA user?
Is both Client and DB sever are on SAME domain ?? If not, then I think Windows Authentication will not work for you.
(As already suggested in above answer) create a SQL Login try with to connect DB from Client using that Login.
If both machine are on same domain and still you are not able to connect server, then few things you can check,
Can your client actually "see" this server over network ??
Most common reason is firewall. By default SQL Server communicates from port 1433 and 1434. Try to see if this MSDN link helps
Make sure that your SQL Server instance is configured to communicate using TCP/IP. This can be configured from SQL Server Configuration Manager.