I am trying to allow remote connections for SQL Server Express. When I connect from machine A to connect to SQL Server on machine B using Visual Studio, I get an 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
I followed the following steps below which did not help.
Enable remote connections on the instance of SQL Server that you want to connect to from a remote computer. Turn on the SQL Server Browser service. Configure the firewall to allow network traffic that is related to SQL Server and to the SQL Server Browser service.
In fact I tried by turning off firewalls entirely but no luck. Any suggestions ?
You need to open the SQL Server Configuration Manager and enable TCP/IP. This is not enabled by default. Port 1433 will need to be open for remote connections.
SQL Server Configuration Manager
SQL Server Network Configuration
Protocols for $InstanceName
Right hand pane select TCP/IP and enable
Related
When I try to connect to SQL database from another computer using SQL Server Management Studio with Server Name [ my_ip_address,1433\MyServerName ] and SQL authentication, I get this error:
Cannot connect to XX.XXX.XXX.XXX,1433\MyServerName.
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: TCP Provider, error: 0 - The wait operation timed out.) (Microsoft SQL Server, Error: 258)
The wait operation timed out
I have done all of the needed steps:
Allowed remote connection in Server Properties window in SQL Management Studio
Enabled TCP/IP in SQL Configuration Manager (in SQL Server Network Configuration)
Set Inbound/Outbound enable connection (Domain, public, private) rules in Windows Firewall for ports
TCP 1433
This tuto solved the problem for me:
Allow SQL Server through Windows Firewall (
https://www.youtube.com/watch?v=3jVTUll4PXs)
I had to add the paths of the sql server and sql server browser services to the allowed apps by the firewall.
I can't connect to a remote SQL Server.
I get this 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)
On the remote machine, the SQL Server is running and port 1433 is open.
In my Visual Studio Server Explorer, the data connection to the remote database shows a little red cross. The state is closed. - I can't see the remote pc in the server name select field. But I can successfully ping the remote computer.
How to connect to the server?
EDIT:
My connection string: {Data Source=wsbd0311\SQLEXPRESS;Initial Catalog=rms;User ID=sa;Password=mypassword} (I can login with this Id and password.)
I allready set "Allow remote connctions to this server" on the remote SQL Server.
EDIT No.2:
Do I need to have an open port 1434 on the remote SQL Server?
Make sure the server is running on the remote pc. Connect to the remote pc and check whether the SQL server instance is running on it by All Programs -> SQL Server -> SQL Server Configuration Manager -> Under SQL Server Services check whether the SQL Server service is on running state. If not try starting the service and connecting.
Furthermore Enable TCP/IP under the Protocols for MS SQL Server which comes under SQL Server Network Configuration.
You may be able to ping the server if the machine is turned on, but in order to connect to the SQL server instance, you should make sure that the SQL server is up and running on the server machine. Check this link for more details
How to Start, stop or restart SQL Server Instance
I have a VPS, installed SQL Server and everything but the problem is that I can't access the database from outside my VPS.
I tried the following:
Enable port 1433 in firewall
Enable windows and server authentication in SQL Server
Enable TCP/IP
Make sure that SQL Browser is Running
When I connect using SQL Server authentication inside my VPS, it works fine, but from my PC I get this 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) (Microsoft SQL Server, Error: -1)
Now what should I do?
Most probably, your MS SQL server is not configured for Remote Access. Try following:
1) Open SQL Server Configuration Manager.
2) Click on Protocols for SQLEXPRESS from left hand side pane, from right hand side pane, double click on TCP/IP.This will open TCP/IP properties.
3) Under TCP/IP properties page, enter public IP address of SQL server under IP address field. Enter port number 1433 under port TCP port field.
4) Click on Apply and OK.
5) Restart the MS SQL Service.
6) Connect to MS SQL Server through SQL Server Management Studio as follows:
My response might be old though. Say you are still experiencing the same issue,
Ensure that Protocol is set to Yes
Then restart SQL Server and you
should be fine.
I am trying to connect to MS SQL Server 2008 R2 Express Edition through a Remote computer.
I am getting this 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)
On running SELECT CONVERT(char(20), SERVERPROPERTY('InstanceName')) instancenameting
I get NULL as the instance name. I have started SQL Browser service, checked TCP/IP are enabled.
What else can be done?
Use
Data Source=IP-0A6E3175;Network=DBMSSOCN;...
Or
Data Source=<<ip address>>;Network=DBMSSOCN;...
You'll also need to make sure that TCP/IP is enabled on the host using SQL Server Configuration Manager, that you aren't blocked by a firewall, etc.
And just for kicks, also please try:
Data Source=<<ip address>>\SQLEXPRESS;Network=DBMSSOCN;...
In addition to Aaron's suggestion to ensure your connection string uses tcp, run SQL Server Configuration manager and check the following:
do you have more than one instance?
tcp/ip enabled?
if the instance you are targeting is not the default instance, it will not be on port 1433 but rather some dynamic port. The Microsoft libraries figure out which port using SQL Server Browser on port 1434. Your firewall needs to allow that also (UDP).
if your Express instance is the only instance, you can change to use port 1433. Then you don't need SQL Server Browser.
Error while connecting to external SQL Server IP using SQL Management Studio 2005 address
TITLE: Connect to Server
Cannot connect to 1.2.3.4\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)
For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&EvtSrc=MSSQLServer&EvtID=-1&LinkId=20476
By default, SQL Server 2005 doesn’t allow remote connection so you have to enable it manually. So if #abatishchev's solution doesn't get you going; it may be you haven't set the permissions to connect.
Run the Surface Area Configuration Manager (it should be in the SQL Server folder in My Programs under Configuration Tools).
Choose Surface Area Configuration for Services and Connections
Select your server expand database engine and then remote connections and enable TCP/IP and / or tcp/ip and named pipes. Click Apply.
Whilst you are here check the SQL Server Browser is set to run. Expand it out and choose the service; change the startup type to be Automatic.
Try again in management studio express to connect to the machine.
Make sure that remote server allows connection to port 1433/tcp, e.g.:
using telnet client (in Windows 7 isn't installed by default, to install use Turn Windows features):
telnet 1.2.3.4 1433
or using nmap (port scanner)
nmap -sT -r -n -vv -p1433 1.2.3.4
If doesn't allow - check inbound firewall rules.