I am trying to set up a linked server and running into an issue.
On the target server I have configured a user, let's say Q. I have set the source server to connect with Q's login credentials no matter what user is logged in at Source Server.
However when I try to connect, I get the error
"Named pipes provider : could not open a connection to SQL Server
[1231]."
I have tried enabling and disabling named pipes in the server configuration manager, to no avail.
Also I have seen some things saying it is a security problem. The thing is, I am able to connect from Target to Source using Q's credentials in SQL management studio just fine.
Is there something stupid I'm missing here?
is the firewall at the linked server on?
check if the firewall is blocking the named pipes port, which usually is 445
try telnet to the linked server via port 445
Open Server Objects\Linked Servers, then Properties on your linked server. What did you enter here - maybe you are mapping some existing credentials to target credentials?
You should only check the option "Be made using this security context" and then enter Q and it's login. Also, check the "Server Type" to match the destination (Sql server)
On a side note, if the error were due to not supporting of named pipes, I thing you would get a different error, like "error 28 Server doesn't support requested protocol"..
Related
i'm a new to stackoverflow but maybe i may also ask a question. I also hope i can help others to find solutions regarding their issues.
So, here we go. I moved a database from an old SQL server to a new one. While trying to configure the application to use the new location of that database shows up an error message like this:
Cannot connect to \MSSQLSERVER.
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: 25 - Connection string is not valid) (Microsoft SQL Server, Error: 87)
The parameter is incorrect
So i started an analysis to solve this issue. And i checked those things:
DNS resolution -> check
ping to the new SQL Server -> check
Firewall disabled -> check
Remote connections on SQL Server enabled -> check
Still receiving this error message. I configured the SSMS on the application server and ran that as SQL server service user without any success.
SQL Server browser is running
TCP/IP is enabled using the default port 1433
I am not sure regarding the SQL server instance name. IMHO it is shown in the service name and the default instance name is MSSQLSERVER. The error message mentions that the connection string is not valid.
So, at this point i don't have any further ideas.
Greetings,
Chris
[EDIT] I don't use any specific connection string because i connect using SSMS.
enter image description here
[EDIT2]
I was able to connect locally using the hostname (not localhost).
All tests below do not use an instance name
Test Result
-----------------------------------------------------
Locally, hostname, AD Auth Success
Remote, hostname, AD Auth The target principal name is incorrect. Cannot generate SSPI context
Remote, FQDN, SQL Auth Connection string is not valid
Step 1: Login Authentication Windows or SQL Server
Check your login Authentication whether its Windows or SQL Server.
Step 2: Use (.) (dot) instead of complete server name
If you are using local MS sql database then you can use (.) (dot) instead of complete server name.
Step 3: Enter Correct Host Name
Enter your correct host name: (hostname\SQLEXPRESS) my_hostname\SQLEXPRESS (in case of SQL Server Express) or (my_hostname\mssqlserver).
Step 4: Try localhost slash () then host name
You can also try localhost slash () then host name, here is sample as (localhost\SQLEXPRESS) or (localhost\mssqlserver).
I tried to login to a remote server and I saw the error given at the link -
http://www.microsoft.com/products/ee/transform.aspx?ProdName=Microsoft+SQL+Server&EvtSrc=MSSQLServer&EvtID=2
Message says -
Message: An error has occurred while establishing a connection to the server. When connecting to SQL Server, 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) (.Net SqlClient Data Provider)
Which is followed by -
Explanation
SQL Server did not respond to the client request because the server is probably not started.
Arent the message and explanation contradicting each other ? Which one is the correct reason for the problem ? How do i find out the REAL source of the problem ?
They don't contradict each other. They just give different possible reasons:
SQL Server doesn't allow remote connections
SQL Server is not started
To fix it, make sure that SQL Server allows remote connections and is started.
Allowing remote connections can be done in the "SQL Server Configuration Manager":
Start that program on the server on which SQL server is installed.
Navigate to "SQL Server Network Configuration" -> "Protocols for "
Double click on the connection type - e.g. Named Pipes - and set "Enabled" to "Yes".
If you are enabling TCP/IP, make sure to also enable each individual IP address on the second tab.
See this blog post for more info.
Thee program you are using is unable to find SQL server on the port/address it expects to.
This is likely either because it is misconfigured, or because SQL server is stopped.
I suggest you open a desktop login to the machine in question, and see if SQL server is running.
There are other potential causes for this problem, as well: network problems, for example.
I have migrated a classic ASP site to a new server and am getting the following error, message.
I have tried different connection strings but none of them work.
I am not even sure if the connection string is the problem
The new server is a Windows 2012 Server, SQL Server 2008 R2 Express machine.
Microsoft OLE DB Provider for SQL Server error '80004005'
[DBNETLIB][ConnectionOpen (Connect()).]SQL Server does not exist or access denied.
/scripts/dbcode.asp, line 31
Application("C2M_ConnectionString") = "Provider=SQLNCLI10;Server=(local);Database=mysite_live;Uid=mysitec_Live;Pwd=mypass;"
If it is an Express instance, it is most likely not a default instance, but rather a named instance. So you probably meant:
... "Provider=SQLNCLI10;Server=.\SQLEXPRESS; ...
--- instead of just (local) ---^^^^^^^^^^^^
Otherwise you'll need to show us the server properties in SQL Server Configuration Manager on that machine in order for us to be able to tell you how to correct your connection string.
As Aaron Bertrand mentioned it would be interesting to have a look at your connection properties (In Sql Server configuration check if the following are enabled Name Pipes and TCP/Ip).
Since you're able to connect from SSMS i would ask to check if the Remote connection is allowed on that server Also can you tell is the Sql browser service is running?
here is a link that i keep close to me as a reminder or check list on probable connection issues on SQL Server.
Sql Connection Issues
And lastly can you try as provider "SQLNCLI" instead of "SQLNCLI10"
Step-1: Enabling TCP/IP Protocol
Start >> All Programs >> Microsoft SQL Server >> Configuration Tools >> SQL Server Configuration Manager >> SQL Server Network Configuration >> Protocols for MSSQLSERVER >> right click “TCP/IP” and select “Enable”.
Step-2: change specific machine name in Data Source attributes'value to (local) will resovle the problem ni SQL SERVER 2012.
Try pinging the server in your connection string. The server your application resides on should be able to communicate on the port you specify by credentials. If you are developing locally try specifying "localhost". If the server is clustered or you installed as an instance then you need to specify that instance. Also make sure the server is configured for mixed-mode authentication if using sql credentials.
OR Try
Data Source=localhost;Initial Catalog=DBNAME;Persist Security Info=True;User ID=MyUserName; Password=MyPassword;
It can be a permission issue , Please check is that server is connecting with same configuration detail from SQL management.
other is username / password is wrong.
Here is what I would do:
EDIT: Note that this SO post, a few down, has an interesting method for creating the correct connection string to use.
Open SSMS (Sql Server Management Studio) and copy/paste the
username/password. Don't type them, copy/paste. Verify there isn't
an issue.
Fire up the code (this is next for me b/c this would be the next
easiest thing to do in my case) and step to line 31 to verify that
everything is setup properly. Here is some info on how to do
this. I understand that this may be impossible for you with this
being on production so you might skip this step. If at all possible
though, I'd set this up on my local machine and verify that there is
no issue connecting locally. If I get this error locally, then I
have a better chance at fixing it.
Verify that Provider=SQLNCLI10 is installed on the production
server. I would follow this SO post, probably the answer posted
by gbn.
You have other working websites? Are any of them classic asp? Even
if not, I'd compare the connection string in another site to the one
that you are using here. Make sure there are no obvious differences.
Fire up SQL Server Profiler and start tracing. Connect to the site
and cause the error then go to profiler and see if it gives you an
additional error information.
If all of that fails, I would start going through this.
Sorry I can't just point to something and say, there's the problem!
Good luck!
Have you ever tried SQL Server OLE DB driver connection string:
"Provider=sqloledb;Data Source=(local);Initial Catalog=mysite_live;User Id=mysitec_Live;Password=mypass;"
or ODBC driver:
"Driver={SQL Server};Server=SERVERNAME;Trusted_Connection=no;Database=mysite_live;Uid=mysitec_Live;Pwd=mypass;"
At least this is what I would do if nothing helps. Maybe you will be able to get more useful error information.
Could this be a x86/x64 thing?
The following thread seems to indicate that the (local) alias is a 32-bit alias which fails on 64-bit server:
http://social.msdn.microsoft.com/Forums/en-US/sqldataaccess/thread/c701d510-90e5-4dd0-b14f-ca1d694d6615
(note that the error is exacly what you had)
When you were testing the .udl on the server did you test both x86 and x64?
Following the advice from this blogpost (http://blogs.msdn.com/b/farukcelik/archive/2007/12/31/udl-test-on-a-64-bit-machine.aspx) you could test your
local udl :
in 64-bit by just double clicking it (acts the same as running "C:\Program Files\Common Files\System\Ole DB\oledb32.dll",OpenDSLFile C:\\test.udl
in 32-bit by double running C:\Windows\syswow64\rundll32.exe "C:\Program Files (x86)\Common Files\System\Ole DB\oledb32.dll",OpenDSLFile C:\\test.udl
If you can confirm it's a problem with the alias I'd suggest you create a new one by following the guidelines found here:
http://msdn.microsoft.com/en-us/library/ms190445(v=sql.105).aspx
Have you tried to use the server IP address instead of the "(local)"?
Something like "Server=192.168.1.1;" (clearly you need to use the real IP address of your server)
In case you try to use the server IP address, check in the "SQL-Server configurator" that SQL Server is listening on the IP address you use in your connection. (SQL Server Configurator screenshot)
Other useful thing to check / try:
And check also if the DB is in the default SQL Server instance, or if it is in a named instance.
Do you have checked if the firewall have the TCP/IP rule for opening the port of you SQL Server?
Have you tried to connect to SQL Server using other software that use the TCP/IP connection?
The SQL Server Browser service is disabled by default on installation. I'd recommend that you enable and start it. For more information, see this link and the section titled "Using SQL Server Browser" for an explanation of why this might be your problem.
If you don't wish to enable the service, you can enable TCP/IP protocol (it's disabled by default), specify a static port number, and use 127.0.01,<port number> to identify the server.
In line 31:
cmd.ActiveConnection = Application("C2M_ConnectionString")
How are you instantiating cmd?
Rather than the ConnectionString being wrong, maybe cmd is acting differently in the new environment.
Edited to add:
I see that you've gone from IIS 7 to IIS 8. To run Classic ASP sites on IIS 7 required manual changes to server defaults, such as "allow parent paths." Is it possible that some of the needed tweaks didn't get migrated over?
If you're not running with Option Strict On, you should try that - it often reveals the source of subtle problems like this. (Of course, first you'll be forced to declare all your variables, which is very tedious with finished code.)
I am at an loose end with one particular box that is running SQL Server 2008 R2 Express.
Windows Firewall is configured to allow inbound TCP & UDP 1433, 1434.
Windows Firewall is configured to allow outbound TCP & UDP on any port.
No other software AV/FW is currently running.
When I try to connect to xxx.xxx.xxx.xxx\sqlexpress, it times out with the following error:
TITLE: Connect to Server
Cannot connect to xxx.xxx.xxx.xxx\SQLEXPRESS.
ADDITIONAL INFORMATION:
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) (Microsoft SQL Server, Error: -1)
I have checked that remote connections are allowed on the server.
I have confirmed TCP/IP is enabled and configured in SQL Server Configuration to allow connections on the external IP to 1433.
I have also used Wireshark from my local machine and I can see requests for 1433 UDP going to the remote server.
But using Wireshark on the remote server shows no inbound connection requests for 1433 UDP or anything from my external IP (with filtering to remote RDP from results).
This makes me think it is a firewall issue.
The server is hosted by an external company who have control over the PIX in front of our server.
I need to troubleshoot this as much as possible myself as the hosting company have no clue what they are doing.
I had a similar problem which was solved by going to the "SQL Server Configuration Manager" and making sure that the "SQL Server Browser" was configured to start automatically and was started.
I came across this solution in the answer of this forum post:
http://social.msdn.microsoft.com/Forums/en-US/sqlexpress/thread/8cdc71eb-6929-4ae8-a5a8-c1f461bd61b4/
I hope this helps somebody out there.
press windows+R open RUN Window
services.msc
find SQL Server(SQLEXPRESS) right click on that and start the service
then check
Go to SQL Server Configuration Manager > SQL Server Services > In Right Side window show all the servers which may stop. If you are using "SQLEXPRESS" then ,
Right click on SQL Server(SQLEXPRESS) and start. After try to connect server... I had same problem but I resolved by these steps.
Here is a simple method to troubleshoot connection issues:
Create an empty file called test.udl using a text editor
Double click the file test.udl, then specify your connection properties
Hit the "Test Connection" button.
I recently encountered the same issue however I am using Windows 10 Technical Preview Build 10041 and SQL Server 2014 (Advanced).
Follow the same advice from above:
In particular, my problem was that I did not enable the TCP/IP in Sql
Server Configuration Manager->SQL Server Network
Configuration->Protocols for SQLEXPRESS.
Once you open it, you have to go to the IP Addresses tab and for me,
changing IPAll to TCP port 1433 and deleting the TCP Dynamic Ports
value worked.
Follow the other steps to make sure 1433 is listening (Use netstat -an
to make sure 0.0.0.0:1433 is LISTENING.), and that you can telnet to
the port from the client machine.
Finally, I second the suggestion to remove the \SQLEXPRESS from the
connection.
AND ----> That last line is important! It looks like to be Windows 10 specific; remove \SQLEXPRESS from your connection string. What was frusting was that SQL Management Studio connects just fine using either connection string (full or short), however Visual Studio only accepted the connection string without the \SQLEXPRESS.
The active firewall on the server might be causing this. You can try to (temporarily) turn it off and see if it resolves the issue.
If it is indeed caused by the firewall, you should allegedly be able to resolve it by adding an inbound rule for TCP port 1433 set to allowed, but I personally haven't been able to connect this way.
I had a Same Problem but i solved by Restarting the browser service in SQL CONFIGURATION MANAGER and removing \SQLEXPRESS from the instance name in the connection window.
It's security all about. Make sure you have double check your firewall (windows and anti virus) in some cases when you disabled av firewall and restart your computer, automatically windows firewall is active and it's still block your application. Hope this is helpful ..
Could you post the connection string you're using that's giving you trouble?
You might need to add the port number to the Data Source value, as omitting it can also produce SQL Error 26.
E.g.: Data Source=ServerHostName\SQLServerInstanceName,1433
If you have done anything but in spite of all couldn't connecting?!!
In my case i have changed connection part splitting port "," instead of this ":"
The corresponding TCP port or pipe name is not specified in the connection string (such as Srv1\SQL2008, 1433).
This issue also confused me a few days, after the IT guy changed some security settings on the SQL Server.
I have an EntityFramework for the Web application and for a desktop application.
After I changed some settings on the SQL Server, the Web application comeback to work, but the desktop still facing issue. But I used the same connection string for both applications, it make no sense one is working but the other doesn't.
Then I searched a lot until I found someone saying here it is needed to add port number 1433 after the $ServerName\$DatabaseInstanceName,1433.
After I added it, the exception became:
System.Data.SqlClient.SqlException: Login failed for user
'domain\name-PC$'
Then I found this link. It says to add Trusted_Connection=False;.
The whole connection string should be like:
data source=XXXXX\SQLSERVER,1433;initial catalog=XXXDB;user id=UserID;password=PWD;Trusted_Connection=False;MultipleActiveResultSets=True;
Hope this answer will help the ones out off Generic exception:
Error: 26-Error Locating Server/Instance Specified
Have you Disabled the VIA setting in the SQL configuration manager? If not, do disable it first (if VIA is enabled, you cannot get connected) and yes TCP must be enabled. Give it a try and it should be working fine.
Make the changes only for that's particular instance name.
Cheers!
I found this url to be very useful:
https://social.msdn.microsoft.com/Forums/sqlserver/en-US/2cdcab2e-ea49-4fd5-b2b8-13824ab4619b/help-server-not-listening-on-1433
In particular, my problem was that I did not enable the TCP/IP in Sql Server Configuration Manager->SQL Server Network Configuration->Protocols for SQLEXPRESS.
Once you open it, you have to go to the IP Addresses tab and for me, changing IPAll to TCP port 1433 and deleting the TCP Dynamic Ports value worked.
Follow the other steps to make sure 1433 is listening (Use netstat -an to make sure 0.0.0.0:1433 is LISTENING.), and that you can telnet to the port from the client machine.
Finally, I second the suggestion to remove the \SQLEXPRESS from the connection.
EDIT: I should note I am using SQL Server 2014 Express.
This really Works .. i had verified lot of sites and finally got the answer
This may occurs when the master.mdf or the mastlog.ldf gets corrupt . In order to solve the issue goto the following path
C:\Program Files\Microsoft SQL Server\MSSQL10_50.MSSQLSERVER\MSSQL , there you will find a folder ” Template Data ” , copy the master.mdf and mastlog.ldf and replace it in
C:\Program Files\Microsoft SQL Server\MSSQL10_50.MSSQLSERVER\MSSQL\DATA folder .
Thats it . Now start the MS SQL service and you are done .
While there can be many reasons for this error - In my case it was pretty simple which I overlooked for a while. I was using server IP address along with instance name for Server as -
<add name="MyDBConnection"
connectionString="Persist Security Info=False;User ID=sa;Password=xxx;Database=MyDB;Server=nn.nn.n.nn\SQLInstance01; Connection Timeout=180" providerName="System.Data.SqlClient"/>
Correct connection string will look something like this (note this one doesn't have SQL Server instance name)
<add name="MyDBConnection"
connectionString="Persist Security Info=False;User ID=sa;Password=xxx;Database=MyDB;Server=nn.nn.n.nn; Connection Timeout=180" providerName="System.Data.SqlClient"/>
HTH.
In my case, I Installed SQL Express 2012 and the problem raise after I reboot my PC. I solved so:
I go to Services -> SQL Server (SQLEXPRESS) and I see that was stopped. I started and It's say an login error.
In properties, Tab Log On, I change it to Local System account , then I can start the SQL service.
Then to test it, I go to SQL Server Management Studio and I connect to .\SQLEXPRESS and it works!
I had a similar problem which was solved by going to the "SQL Server Configuration Manager" and making sure that the "SQL Server Browser" was configured to start automatically and was started.
it works for me
I got a similar problem with sql server , I have tried every thing but does not connect to database engine & it shows error:26.
First check if the database engine is running or not. by going into
configuration manager. start > sql server >sql server configuration
manager. On the right pane you should see the sql server (mss .. )
should be running state with a green indication.
IF the database engine is not running, simply uninstall sql
server / format your system if possible and then download sql
server 2012 and management studio. from
https://www.microsoft.com/en-ca/download/details.aspx?id=29062
Install server first, make sure to add server on installation phase
by clicking add server and then install management studio.
All you need to do is to go to the control panel > Computer Management > Services
and manually start the SQL express or SQL server.
It worked for me.
Good luck.
I keep getting the following error when I try to register a db server:
TITLE: Connect to Server
Cannot connect to p3swhsql-v14.shr.phx3.secureserver.net.
ADDITIONAL INFORMATION:
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) (Microsoft SQL Server, Error: 3)
For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&EvtSrc=MSSQLServer&EvtID=3&LinkId=20476
BUTTONS:
OK
I googled, but most of the solutions are related to checking stuff on the sql server. It
s a shared server and I don't have access to the machine. I tried to register another db server and I get the same error. I know the connection properties are correct. I am not sure what else I can do. Btw, the windows firewall on my local machine is disabled.
There is a similar thread with some suggestions at: Getting a sql connection error when trying to login.
Other possible issues could be a firewall on the server side that is only allowing connections from a certain IP range. Even if your own firewall is off, that doesn't mean the server's firewall is letting your machine through. Did the server admin open up a hole for your home machine?
If the server isn't set up to receive remote connections and you can't edit the server, I'm not sure that there's much you can do. You can't connect to a remote database if it doesn't want you to, and for good reason.
Many times, you can also be limited to just one IP or range of IPs, so it won't work from multiple locations. Again, this is something to set on the server, so you'd need to check with your provider.
This error was due to the office firewall. If I connect to another VPN, everything works fine. Whilst doing research on google, I came across something perhaps it could be useful to somebody else.Go to the registry editor:
HKEY_Local_Machine > software > Microsoft > MSSQLServer > Client > SuperSocketNetLib . The protocolOrder in my instance was set to start with np tcp and so on. You can modify the order so that tcp :: port 1433 is used before trying to connect via named pipes.'
Check out this link.
It was very helpfull. Just follow few steps and u will get to know the solution
http://techpint.com/programming/error-26-%E2%80%93-error-locating-serverinstance-specified-sql-server