I want to ask you about a problem.
I have developed a windows application that uses a SQL Server database with SQL Server authentication (with a username and password) to log in.
The database is located on a local server which uses the same network as my company computers.
Now I have published the application and installed it on my computer (where I developed it and in which I also have the SQL server installed).
I also installed the application on the computers of some colleagues who do not have any program installed (they do not have Visual Studio or SQL Server installed).
When I try to log in to the application from my computer everything works fine.
(I can enter in application and database communication works very well).
But when I try to log in to the application from other computers (with the same user which I used on my computer before), it does not work.
I get this error:
Named pipes provider error 40 could not open a connection to SQL Server
I did these steps on the server where the application is located as:
Enable TCP / IP in SQL Server Configuration
Open Port in Windows Firewall 1433
Allow remote connections to this server
Can you help me with any suggestions?
I would try creating a ODBC connection to your machine from the client as a quick test - using the ODBC control panel. If that works, then check your connection string in the app. Maybe it's configured as a local connection? (The connection string would be my first guess.)
There are so many things that can be wrong that it a guessing game. This link might help.
https://learn.microsoft.com/en-us/sql/database-engine/configure-windows/troubleshoot-connecting-to-the-sql-server-database-engine?view=sql-server-ver15
I'll preface my question with: I am an absolute beginner with respects to the nature of MS SQL Server and have a layman's understanding of networking and 'computers' in general...
So, I'm trying to replicate an environment where:
There is an 'application server' which hosts HPE's ALM
This communicates with a database server with a Microsoft SQL Server DB
I currently have Microsoft SQL 2012 Server with a sample DB uploaded onto it on one laptop (Laptop 1) and the ALM software on the other laptop (Laptop 2). Both are connected to the same WiFi network.
Laptop 2 is asking me for Database parameters such as:
DB Host Name
DB Port Number (1433 by default)
OR Connection String
I have little idea of what I'm doing - I'd have thought it might be possible to connect to the DB through some sort of variant of the IP address of Laptop 1... but I'm unsure.
How can I connect to a MS SQL 2012 DB from one laptop to another? I realise this is probably a loaded question - I'd be happy if someone can point me in the right direction rather than an exact answer!
Thanks guys,
ST
I see two potential issues:
A corporate laptop might have firewall restrictions. So, you have to
open port 1433 for SQL Server.
Possibly you are playing with SQL Express, which by default, does not
have TCP/IP connection enabled. To enable it run "SQL Server
configuration manager", go to Network
configuration->Protocols->TCP/IP->Enable->restart SQL Server. Also check other properties. If static port 1433 is not set - set it.
Two types of adjustments must be set before connecting to the remote SQL Server. These settings are necessary because without them the connection to the remote SQL Server will not be able to be successfully created
Configuration settings:
-The SQL Server instance to allow the protocol being requested
-Allow access through the Window Firewall
1- Enabling TCP/IP protocol
2- Configuring Windows Firewall
For More details see the link :
https://www.sqlshack.com/how-to-connect-to-a-remote-sql-server/
I get the Exception: "General network error. Check your network documentation." when connecting to our new SQL Server 2008 R2 server. Nothing more that that I can tell about the exception.
In windows CE5 or CE6 (depending if using Motorola MC3090 or MC3190), Microsoft SQL Client 2.0 is installed (package sql.wce5.armv4i.CAB get deployed when running the application from Visual Studio 2008). I’m not able to connect to that DB on both version of the gun… I’m only able to connect with our Windows applications (x32 and x64). The connection string I use is the following: "Data Source=ip_address;Database=dbname;User ID=username;Password=password"
I successfully connected to a dev database in our LAN. The dev database server is also 2008 R2 SP1 but there are no port block (wide open). Apparently, nothing is blocked according to the sys admins. The new DB server is now virtual and remote.
Is it possible there is some kind of options to prevent connections from some sources? Is there any diagnostics tools I can use?
Any ideas beside that?
Thanks
That was finally my fault. When testing I left the gun on the cradle and connection failed that way... I needed to test with the gun not on the cradle using its wireless connection and it worked!
Windows 7, IIS 7.5, SQL Server 2008 R2, ASP classic (website I want to upgrade, but need to make it works).
connection string:
Provider=SQLNCLI10; Data Source=.\SQLExpress; Initial Catalog=shoshvi_sql-db;Integrated Security=SSPI;Connect Timeout =1
I am getting this annoying error:
Microsoft SQL Server Native Client 10.0 '80004005'
Named Pipes Provider: Could not open a connection to SQL Server [53].
filename.asp, line 15
What I tried, as I remember:
Test connection using SSMS (works, to localhost and to other server in LAN)
Test connection using SQLCMD (works, to localhost and to other server in LAN)
Tried many datasources/servers ( name\SQLExpress, .\SQLExpress, .\SQLEXPRESS)
Tried to change settings in Start Menu\Programs\Microsoft SQL Server 2008\Configuration Tools, enable TCP/IP, Named Pipes, look all sub items and find wrong configuration.
after any change, I was restarted service.
Tried to enable SQL Server Browser.
Tried to connect to other SQL Server in the same network, using SA and SA password (in the other "server" I could use IIS/ASP/MSSQL and works fine).
Tried to disable Windows Firewall
Tried to enable remote connections to SQL Server Express
Tried Integrated Security=SSPI
Tried Windows Administrator password
Tried change to TCP/IP (and get other error, same reason)
Tried to search google, and stackOverflow and other for an idea.
Tried similar questions here.
What more?
Thanks !
Try this. And make sure you have TCP/IP enabled under 'SQL Native Client Configuration' on SQL Configuration Manager.
PROVIDER=SQLNCLI;DRIVER={SQL server};SERVER=127.0.0.1;DATABASE=shoshvi_sql-db;UID=username;PWD=password;
Double-check that any ALIAS you're using is created properly.
I was encountering exactly the same error and it turned out to be that I hadn't created the alias used in a script when trying to run it on a new machine.
I’m trying to access the SQL Server instance on my VPS from SQL Server Management Studio on my local machine. It’s not working (the error I’m getting 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.
I think this is because I need to configure the database engine to allow remote connections (correct me if I’m wrong!). So I’ve found this step-by-step guide to help me do that: http://www.linglom.com/2009/03/28/enable-remote-connection-on-sql-server-2008-express/ I’ve got to point 10 in the guide and I am now stuck! I don’t have SQL Server Management Studio installed on my VPS. Anyway, this has left me with two options:
Install SSMS
Find another way to do point 10 onwards in the guide without having SSMS installed
I tried installing SSMS on my VPS using the Web Platform Installer but it keeps failing. I don’t know why it’s failing because it doesn’t seem to give a reason why. Does anyone know how I could allow remote connections a different way?
The version of SQL Server installed on my VPS is SQL Server 2008 R2 Express.
Update:
I have tried to disable the firewall on both my laptop and VPS to see if it is a firewall issue. This made no difference to the error message.
Another Update:
Having now been able to install SSMS (I installed directly from the website rather than using the WPI), I have been able to check that the server is configured to allow remote connections (I went to SSMS, connected to the SQL Server instance, right-clicked on the connection, clicked Properties, went to the Connections tab. "Allow remote connections to this server" is already ticked).
SOLUTION
Thanks to everyone for helping me get to this solution! I've finally managed to get it to work! I followed Filip De Vos's advice and opened the ports in the Firewall on my VPS and then I received a different error message. This led me to investigate further and I found that I was using the wrong credentials to login! So I've set a password for the sa user and I've managed to login using that! Thanks again!
To enable mixed authentication you can change the following registry key:
HKLM\Software\Microsoft\Microsoft SQL Server\MSSQL.1\MSSQLServer\LoginMode
Update the value to 2 and restart the Sql Server service to allow mixed authentication. Note that MSSQL.1 might need to be updated to reflect the number of the SQL Server Instance you are attempting to change.
A reason for connection errors can be a virus scanner installed on the server which blocks sqlserver.exe.
Another reason can be that the SQL Server Browser service is not running. When this service is not running you cannot connect on named instances (when they are using dynamic ports).
It is also possible that Sql Server is not setup to listen to TCP connections and only allows named pipes.
In the Start Menu, open Programs > Microsoft SQL Server 2008 >
Configuration Tools > SQL Server Surface Area Configuration
In the Surface Area Configuration utility, click the link "SQL Server
Configuration Manager"
Expand "SQL Server Network Configuration" and
select Protocols.
Enable TCP/IP. If you need Named Pipes, then you can
enable them here as well.
Last but not least, the Windows firewall needs to allow connections to SQL Server
Add an exception for sqlserver.exe when you use the "Dynamic Port" system.
Otherwise you can put exceptions for the SQL Server ports (default port 1433)
Also add an exception for the SQL Server Browser. (udp port 1434)
More information:
How to: Configure a Windows Firewall for Database Engine Access
Server Connectivity How-to Topics (Database Engine)
As a last note, SqlLocalDB only supports named pipes, so you can not connect to it over the network.
In addition to configuring the SQL Server Browser service in Services.msc to Automatic, and starting the service, I had to enable TCP/IP in: SQL Server Configuration Manager | SQL Server Network Configuration | Protocols for [INSTANCE NAME] | TCP/IP
Launch SQL Server Configuration Manager on your VPS.
Take a look at the SQL Server Network Configuration. Make sure that TCP/IP is enabled.
Next look at SQL Server Services. Make sure that SQL Server Browser is running.
Restart the service for your instance of SQL Server.
Open the SQL Server Configuration Manager....
2.Check wheather TCP and UDP are running or not....
3.If not running , Please enable them and also check the SQL Server Browser is running or not.If not running turn it on.....
Next you have to check which ports TCP and UDP is using. You have to open those ports from your windows firewall.....
5.Click here to see the steps to open a specific port in windows firewall....
Now SQL Server is ready to access over LAN.......
If you wan to access it remotely (over internet) , you have to do another job that is 'Port Forwarding'. You have open the ports TCP and UDP is using in SQL Server on your router. Now the configuration of routers are different. If you give me the details of your router (i. e name of the company and version ) , I can show you the steps how to forward a specific port.
I had the same issue where my firewall was configured properly, TCP/IP was enabled in SQL Server Configuration Manager but I still could not access my SQL database from outside the computer hosting it. I found the solution was SQL Server Browser was disabled by default in Services (and no option was available to enable it in SQL Server Configuration Manager).
I enabled it by Control Panel > Administrative Tools > Services then double click on SQL Server Browser. In the General tab set the startup type to Automatic using the drop down list. Then go back into SQL Server Configuration Manager and check that the SQL Server Browser is enabled. Hope this helps.
Disable the firewall and try to connect.
If that works, then enable the firewall and
Windows Defender Firewall -> Advanced Settings -> Inbound Rules(Right Click) -> New Rules -> Port -> Allow Port 1433 (Public and Private) -> Add
Do the same for Outbound Rules.
Then Try again.
I recently upgraded from SQL 2008 R2 to SQL 2012 and had a similar issue. The problem was the firewall, but more specifically the firewall rule for SQL SERVER. The custom rule was pointed to the prior version of SQL Server. Try this, open Windows Firewall>Advanced setting. Find the SQL Server Rule (it may have a custom name). Right-Click and go to properties, then Programs and Services Tab. If Programs-This program is selected, you should browse for the proper version of sqlserver.exe.
If you have more than one Instances... Then make sure the PORT Numbers of all Instances are Unique and no one's PORT Number is 1433 except Default One...
Open SQL Server Configuration Manager.
Click SQL Server Services, on the right side choose the server you've created during installation (by default its state is stopped), click once on it and a play button should appear on the toolbar. Click on this play button, wait til its state turns to "Running". Now you're good.
Open SQL Server Management Studio; switch the "Server Type" to "Database Engine" and "Authentication" to "SQL Server Authentication". The default login is "sa", and the password is the password that you chose on creating the server. Now you're good to work.
In my case the problem was caused by the inconsistency between computer names. In system settings my computer was named with some long name, but apparently the name used for some certain communications was trimmed.
I changed the name in the settings to a shorter one and it worked.
I had built both a console app and a UWP app and my console connected fine, but not my UWP. After hours of banging my head against the desk - if it's a intranet server hosting the SQL database you must enable "Private Networks (Client & Server)". It's under Package.appxmanifest and the Capabilities tab.Screenshot
Before download the last version and update your sql server to fix errors of TLS 1.2 on Sql Server 2012. For more information, check here.