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I use cyberduck for SFTP my website files to the server. Dreamhost is the server.
In setting up a new bookmark in cyberduck I received this error "Connection failed - EOF while reading packet." [end of file]
The website is up and working fine, http://ce-t.org
Initially I thought this error had to do with the connection opening with cyberduck. So I setup a different bookmark to test and was able to do without a problem.
I have also deleted my first attempt to setup and reset up. This did not alter anything.
Now after doing more reading, may be in one of the website files?
As you can see i am a novice.
Help appreciated.
Usually when I run into this issue, its because my pw has expired.
Try SSHing into the server and change/update your pw. After I change it, I can FTP in.
This is 3 years too late for the OP. But I had this error when trying to make an SFTP connection to hosting on a Plesk server and the solution was to:
Enable the 'Access to the server over SSH' setting for the ftp user via the Plesk Control panel.
Of course you might need to contact your hosting service to get this done if you are not managing your own server.
In my case the same error occurred due to a syntax error in the .bashrc file on the remote server.
Also note that the default account setting for an FTP user at Dreamhost might specify an FTP connection. If so, trying to use Cyberduck to connect via SFTP will generate this error message. You can use the Dreamhost control panel to edit the user's record to specify SFTP.
In my case I have used dropbear ssh server.
I replace this server with openssh server, and now i can open the sftp connection without any issues.
I was developing, and recompiled started my website with ctrl+F5 and got 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)
How can this even happen?
I didn't changed anything.
I started empty MVC application and start it with CTRL+F5 and it works. I restart my main app, and still doesn't work. Damn.
Problem is, that I didn't change any connection string, anything in mssql server, didn't restart anything. I just compiled application like usual, and it said something about Antlr3 first, then couldn't connect to server anymore.. Changed the port for sql express and it started to work for a 20 minutes, and stopped working again.. don't understand.
this error threw for two type of problem .
1) Check your connection string for correct server Name and database Name ,etc..
Examble : Setting up connection string in ASP.NET to SQL SERVER
2) Check your sqlserver for open , if your sql server is there is any another system , please check your local network and another system network .
Please see this solution
Connect your SQL server from Visual studio > View > server Explorer,test and copy the connection string from there.It will work...My guess is you have a wrong connection string with wrong instance..
Is your database can be accessed outside the network. I think you need to add SQL server to firefall application to access it outside.
To add the sqlservr.exe to windows firefall
1. Go to Control Panel\System and Security\Windows Firewall\Allowed Programs.
2. Click Allow another Program.
3. Add SQL Server
Go to Control Panel -> Administrative Tools -> Services -> SQLServer . Check SQLServer to make sure it is started.
I forgot to put [InitializeMembership] attribute in my HomeController.cs, and it was looping forever because I was using RolesMembership ;)
I have a connection string in my web.config that is a normal one, as the connection strings that we have for sql database but this one is for oracle database that is found on a server on our network.
I think i am filling some fields wrong, like the port(i dunno what it is), sid (same issue).
I am getting this error:
listener refused the connection with the following error ora-12505
Any help is appreciated.
The SID is the name of the database instance. The error message indicates you've got it wrong.
Edit the default value for the port is 1521, for the SID is ORCL. Both parameters are configured in the tnsnames.ora file on the database server.
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.
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)
Hello I am new on developing on SQL Server 2005. I've worked for several years with SQL Server 2000, but after doing the usual stuff I do to connect to the server I get this exception on the web server.
There are several links on google that point me to possible solutions, but none of them have solved my problem. I've made changes on a "Surface Area whatever..." dialog (What the hell is that??? Why does SQL Server has changed so much??? It seems so complicated now).
I have ensured that SQL Server 2005 is configured properly to allow incoming connections on the instance of database server. I also have selected Automatic as the Startup type to start SQL Server Browser service automatically every time system starts. And no, there is no firewall running.
I've tried changing the connection string to connect using a port, to connect using the IP, to connect using the instance name...
Nothing seems to work, I'm still getting the same error. Any hint?
Answering the questions that people have made:
Yes, I can connect using management studio from a different computer.
Yes, I'm sure it's configured to accept local and remote TCP/IP and named pipes.
Yes, I restarted the server.
I am using Mixed mode security, which I already enabled. I already enabled the sa user.
I am able to connect to the database using a .udl file, and I've checked that my connection string is OK. I can connect to the database using DBArtisan and SQL Server client tools. I can do that both on the server and on a different machine. Even with all that...
The website is still unable to connect.
New update...
I've been struggling all day with this problem, and still haven't found out the cause. It seems that the error message I posted is a generic error that .net gives when it's not able to connect. I placed trash on the connection string (typing servers that don't exist) and I still get the same error.
These are some of the connection strings I've used on the server:
connectionString="Integrated Security=SSPI; Data Source=SERVER; Initial Catalog=db; Network Library=DBMSSOCN;"
connectionString="Data Source=SERVER; Initial Catalog=db; User ID=sa; Password=xxxxx;"
connectionString="Data Source=SERVER\MSSQLSERVER; Initial Catalog=db; User ID=sa; Password=xxxxx;"
I tried to register the sql server instance using some strange command, I found that here:
http://kb.discountasp.net/article.aspx?id=1041
To do that I used the aspnet_regsql.exe tool. It's still not working...
I also know that the server has the latest version of MDAC installed on it. The only thing that I'm suspicious on is that the server has two Database engines: SERVER and server\sqlexpress
Does that has something to do with the problem?
The only thing that I'm suspicious on is that the server has two Database engines: SERVER and server\sqlexpress
I think this is the source of the problem. Which one do you intend to connect to? You need to specify the "instance" you are connecting to.
Assuming you intend to connect to the SERVER instance, you connection string should then look like this (assuming the default instance name):
Data Source=YOURSERVER\MSSQLSERVER; Initial Catalog=db; User ID=sa; Password=xxxxx;
Or for sql express the connection string looks like this:
Data Source=YOURSERVER\sqlexpress; Initial Catalog=db; User ID=sa; Password=xxxxx;
Can you connect to the SQL Server via Management Studio from a different machine? This might help you narrow down whether it is the SQL Server configuration or you connection string configuration.
Recheck the surface area configuration, and make sure TCP/IP connections are allowed.
This could be many things. The first thing I would check is to make sure you can connect to the server using SQL Server Management Studio. Second, check your connection string to make sure it is correct. Surface area configuration should not apply for local connections.
Try re-installing the latest MDAC on the server. I once had a similar problem and this solved it.
[http://www.microsoft.com/downloads/details.aspx?familyid=6c050fe3-c795-4b7d-b037-185d0506396c&displaylang=en][1]
Based on the error looks like the code is attempting to connect using named pipes, rather than TCPIP. You may actually need to specifically indicate in your connection string that the sql provider should connect using tcpip, so your connection string would look like the below.
Using Integrated Authentication (windows):
Integrated Security=SSPI; Data Source=SERVERNAME; Initial Catalog=DATABASENAME; Network Library=DBMSSOCN;
Using SQL Authentication:
UID=USERNAME; PWD=PASSWORD; Data Source=SERVERNAME; Initial Catalog=DATABASENAME; Network Library=DBMSSOCN;
I've seen something akin to this happen before, where for some reason "named pipes" is used by default as the transport/connection layer, especially since both the web application and sql server are running on the same machine. I generally always use tcpip as the transport, or network library.
Another troubleshooting technique is to use a UDL (or data link file) to troubleshoot the connection. This allows you to switch between connection providers (ODBC, OLEDB, etc) and to set other connection options.
On the desk top of the machine right click and choose new -> text document.
Rename the *.txt file to TestConnect.udl (name doesn't matter just needs to be .udl extension). You should see the icon change from a text file icon to an icon that shows a computer on top of a data grid, or something like that (in other words windows should have an icon for it.).
Now double click the file and you will see a "Data Link Properties" applet appear.
Click the Provider tab, and you will see a list of different connection providers. I'd start by just choosing "Microsoft OLE DB Provider for SQL Server". We can use this to confirm that OLE DB can connect or not.
Click next, and enter the servername or ip address. Select Windows NT Integrated security. (You can always come back and change it to use a sql login.) At this point you can click "Test Connection". If the connection succeeds, then select a database name from the drop down list.
Lastly, if the connection fails, select the "All" tab, and then look for "Network Library" and edit its value, setting it to "DBMSSOCN".
Go back to the connection tab and click "test connection" again.
Repeat steps 4 and 5 this time with the "SQL Native Client" selected.
Hope this helps.
At the prompt does:
osql -E -S
... get you a > prompt ?
Did you try specifying the instance name in the connection string? Apparently sql server express, in particular, is finicky about having the instance name.
I've also started to poke around with the SQL Server Configuration Manager. So did you click into "SQL Server 2005 Network Configuration" and then look at "Protocols for InstanceName"? And you enabled TCP/IP and Named Pipes?
Did you also look at the "SQL Native Client Configuration" --> "Client Protocols", and you see that TCP/IP and Named Pipes is enabled there as well?
Using the SQL Server 2005 Surface Area Configuration tool, click the "Surface Area Configuration for Services and Connections", then under "Database Engine" --> "Remote Connections" what is selected? Since it appears that you are attempting to connect using Named Pipes you will need to make sure that "Local and remote connections" and "using both tcp/ip and named pipes" is selected.
As you probably know, once any changes are made, you have to stop and restart the sql server instance via Management Studio (you don't need to reboot the entire machine, although rebooting the entire machine will get you there).
And my last piece of advice. Step away from this for a while, and get your mind off of it for a few minutes. When you dive back in, you may find something you missed or overlooked before.
I fixed the issue that I had with the connection. The problem was on my application. The cause of the issue was that a connection string to the development (instead of the production) database, was hardcoded by one of the dialogs that generates the datasets. This dialog placed the connection string both on the web.config, and on a hidden sourcecode file called "Settings.settings.cs". The problem was solved by fixing the connection string to the correct location.
The error message was totally misleading, but I was able to find that by following all the methods presented on the stack trace.
So if you ever find this error message, there are tons of possible causes. Your first bet is to follow the usual steps for this error, which are checking that the server allows remote and local connections, and restarting the browser service.
If that doesn't work, check the stack trace, look for code that is in your application, put a break point there and explore all the properties on the connection string. At least that's how I solved it.