I am having an issue connecting to my SQL Server Database remotely from another computer.
I am trying to connect to the database using a VB.Net application that is suppose to be able to interact with it. I'd say my connection string may be the issue, but I have no problem connecting on the machine the database is on using the connection string.
This is what the connection string looks like though:
"Data Source=[IP_ADDRESS],[PORT];Network Library=DBMSSOCN;Initial Catalog=SQL_Database;Persist Security Info=True;User ID=[USER];Password=[PASS]"
The error I am getting right now is:
Database 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: TCP Provider. error: 0 - The wait operation timed out.).
This is what I have done so far to try to get this to work:
I have made sure that the files being run are on not a network/shared drive.
I've added an exception for TCP Port 1433 and UDP Port 1434 as Incoming Rules to the Firewall.
I've tried disabling the firewall.
I have gone into SQL Server Configuration Manager to ensured that the TCP settings are setup properly.
One thing I am not sure about, is that in the Configuration Manager, I have both the SQL Server and SQL Server Browser running, but the SQL Server Agent is unable to start. Would this cause me my problem?
If not, what else could be my issue? I need to be able to access this database remotely, but the connection string seems to only work locally.
So the issue was literally my company's installed network Firewall. Apparently when I asked if the firewall had been put down for me to test this, "Yes" really meant "No". Once I got the firewall temporarily disabled I was able to connect to everything perfectly fine.
Related
I'm attempting to connect to a test Database on a Parallels VM on Mac using Azure Data Studio, but I'm getting the standard, generic connection error:
System.Data.SqlClient.SqlException (0x80131904): 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: TCP Provider, error: 40 - Could
not open a connection to SQL Server)
Steps I've taken so far to open the connection include:
Opening port 1433 through windows firewall
Ensuring remote connections are allowed on the SQL instance
Setting the TCP/IP Protocol to 5171 for IPAll
Running SQL Server and SQL Browser Instances
Adding a rule to windows firewall for sqlservr.exe to allow all connections
Enabling the SA account and adding a password (password is correct - I've double checked in SSMS on the VM)
I'm able to connect from the windows VM but not the Mac.
My connection string is below (IP is correct, again I've double checked):
Is there a step I've missed or some extra config that I need to do on the VM itself maybe? Or maybe the connection string isn't quite right? I've also tried using the Machine Alias to connect to the instance (SQLEXPRESS) - but still no joy. Anyone know what the problem might be because it's driving me crazy and I can see that other devs have made it work, so I know it's possible. My version of Parallels is Desktop 15, I don't know if that makes a difference or not?
Ok so turns out I needed to open the IPAll port I had set for the TCP/IP Config which in my case was 5171 as well as adding a rule to allow SQL Server Browser to connect to the internet.
For those of whom the above method doesn't work, try Bridged Network instead of Shared Networking in the Network settings and replace the old IP address with the new one.
I am able to connect to Microsoft SQL Server (in Parallels Desktop 16) using Visual Studio Code in macOS Big Sur.
I forwarded port 1433 to 9082 on my server, at firewall set to allow for inbound and outbound, at SQL Server Allow Remote is ON.
But, I can't connect to my SQL Server from client.
I installed SQL Server 2012.
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)
Solution to problems connecting to MS SQL server with Microsoft SQL Server Management Studio if your port is forwarded
I had problem with this as well. It's been bugging me for days now. Finally I stumbled on solution on this page so I'll exclude it as screenshot:
It's not : like in all other systems, you have to put ,
First off check in the ERRORLOG the port used by SQL Server (there is no guarantee it will always listen on 1433, or if TCP is enabled at all).
In the ERRORLOG, at startup, you will find a line like this one:
In my case the port is indeed 1433 but yours may be different. If needed, you can change it using the SQL Server Configuration Manager.
Secondly, if you are forwarding a port to a different one (like your example from 1433 to 9082) you are in fact disabling the SQL Server Browser. This happens because SQL Server Browser does not know of your port forward so it will tell the clients to connect to 1433 (supposing you are allowing UDP 1434 otherwise you won't be able to reach SQL Server Browser at all).
You can connect to a SQL Instance without using the SQL Server Browser though, all you need is to specify the port in the connection string (without the instance name, if any).
For example, if your instance is called MYSERVER/INST your connection string will be something like:
User ID=*****;Password=*****;server=tcp:MYSERVER,9082
Also make sure to configure your SPNs manually otherwise Kerberos won't work.
You can find more details on how to compose the right connection string here: SqlConnection.ConnectionString Property.
try config your router first. after all connect. Btw, already enable TCP/IP #sql yet or not?make sure open port for sql.
check on sql configuration enable or not for open connection
check firewall open or not
check router open or not
check connection lag or not(if network). local no need
make sure sql browser and agent run(for xp if not xp just enable sql browser)
if not all there maybe you wrong installation. if for network work install local/system. not network(this for attach #server cluster)
I have a problem trying to connect to a SQL Server.
I tried using IP address or name of the server on my connection string but I still get an "Error Locating Server".
I enabled TCP/IP on the server and restart it, but no good results.
My actual connection string is : Server=POSTESERVEUR-PC\SQLEXPRESS;Integrated Security=false;Database=****;User ID=****;Password=****;
The error 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.
(provider:SQL Network Interfaces, error:26 - Error Locating Server/Instance Specified)
I have always read a lot of answers to similar problems, but I still don't get what I'm doing wrong.
The SQL Service is running, TCP/IP is listening, and I can ping the server via CMD, the user ID works too, so what is wrong ?
All ideas are welcome. Thanks.
You need to check some steps.
Make sure your server name is correct, e.g., no typo on the name.
Make sure your instance name is correct and there is actually such an instance on your target machine. [Update: Some application converts \ to . If you are not sure about your application, please try both ServerInstance and Server\Instance in your connection string]
Make sure the server machine is reachable, e.g, DNS can be resolve correctly, you are able to ping the server (not always true).
Make sure SQL Browser service is running on the server.
If firewall is enabled on the server, you need to put sqlbrowser.exe and/or UDP port 1434 into exception.
Make sure the Remote Connections enabled on SQL Server – Ensure SQL Server is allowed for remote connections(Server properties/connection/allow remote connection to this server)
I'm having all kinds of trouble getting IBM WebSphere 8.5 to connect to my SQL Server 2012 data source. I have the URL of jdbc:sqlserver://localhost;userName=user;password=password. See the following error (I know it's kind of long):
The test connection operation failed for data source reachingrecovery on server server1
at node MWEISS7X16Node01 with the following exception: java.sql.SQLException: The TCP/IP
connection to the host localhost, port 1433 has failed. Error: "Connection refused:
connect. Verify the connection properties. Make sure that an instance of SQL Server is
running on the host and accepting TCP/IP connections at the port. Make sure that TCP
connections to the port are not blocked by a firewall."
Now, the SQL server and WebSphere are running on the same machine, so I don't think it's a firewall issue. I've checked the SQL server properties under "Connections", and it indicates that everything is fine ("Allow remote connections to the server" is checked.)
I'm at a loss to understand why this is happening. Any suggestions? Thx Mimi
I found out what the problem was. I was using SQL Server Management Studio to check on whether it could make TCP/IP connections or not. What I should have been using was SQL Server Configuration Manager. It had a thing on the left called "SQL Server Network Configuration". I clicked on that, and it brought up "Protocols for server instance name". It had a thing on the right (TCP/IP), which indicated it was disabled. I enabled that, restarted the SQL server, and it worked.
I'm new to SQL related matters so please bare with my lack of knowledge and asking a question which has been asked countless times before.
I have to connect to a SQL database server which is located at a remote location at xxx.xx.xxx.xx:3306, but every time I try to connect I get the same 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: TCP Provider, error: 0 - No connection could be made because the target machine actively refused it.)"
I get this same error whether I try to connect using SQL Server Management Studio or in a C# program via:
SqlConnection myConnection = new SqlConnection(...)
myConnection.Open();
I've tried it on two different computers, both on the same home network. I've had a look at the SQL server configuration manager on the computer which I installed SQL Server on, enabling TCP/IP and fiddling with the port values settings, but I'm guessing this is just for configuring an SQL server on my computer and irrelevant to connecting to a remote one. I shouldn't even need to install SQL server to do queries on a remote server anyway, right?
I've turned off my Windows firewall and my router firewall, though ShieldsUP still says
Port: 3306
Status: Stealth
Your system has achieved a perfect "TruStealth" rating. Not a single packet — solicited or otherwise — was received from your system as a result of our security probing tests. Your system ignored and refused to reply to repeated Pings (ICMP Echo Requests). From the standpoint of the passing probes of any hacker, this machine does not exist on the Internet. Some questionable personal security systems expose their users by attempting to "counter-probe the prober", thus revealing themselves. But your system wisely remained silent in every way. Very nice.
I read that this is irrelevant as well, since I'm not the one hosting the server, but when I was given the address, I was given the port as well, so I must have to do something with it. I'm just not sure what. My understanding of ports really is quite shaky.
I've been trying this for over a day now, and I can't think of anything more I can do.
EDIT: I fixed the problem. I had to use MySQL, not MSSQL. Doh. Sorry guys.
If you are sure the remote SQL Server is running on port 3306 (otherwise I'm not sure why you talked in the question about that port specifically), try the following connection string:
user id=username; password=password;
data source=123.45.678.90,3306;
initial catalog=dbname;
Network Library=dbmssocn;
I think without the port you'll have trouble if the other end has disabled the SQL Browser service. You should also make sure it isn't a named instance, in which case you may need:
user id=username; password=password;
data source=123.45.678.90\InstaneName,3306;
initial catalog=dbname;
Network Library=dbmssocn;
First of all the database is local or distant ?
The you have to ensure that your connection string is well written.
Here's an example of a valid connection string :
Data Source=myServerAddress;Initial Catalog=myDataBase;User Id=myUsername;Password=myPassword;
More about connection strings :
Connection Strings
Now if everything is set up correctly you have to enable remote connections to SQL Server on the host. To do so please refer to this article :
Enable SQL Server Remote Connections
Just go to ypur serveices and check whether your SQL Server (MSSQLSERVER) is running.Most of the time this error happens when SQL Server (MSSQLSERVER) is stopped.
Then select it right click and click start.problem solved !!!