I am having an issue connecting to a SQL server instance with management studio over VPN. I can connect to the default instance (i.e. SERVERNAME) over the VPN connection but I cannot connect to another instance on the same server (i.e SERVERNAME\INSTANCE) over the same VPN connection. All of the settings are the same in SQL Configuration manager.
Additionally, I can connect to the named instance just fine from any box "inside" the network. The error I am receiving is a general, "A network-related or instance-specific error occurred... Error 26."
Thanks
EDIT: I should also point out that I can use IPADDRESS to connect, but IPADDRESS\INSTANCE does not work.
To (partially) resolve the situation you need to choose from one of these workarounds when connecting over VPN:
Enable and use SQL Server Authentication instead of Windows Authentication and a static port for the SQL Server instance (always specifying the port value in the connection string);
Use a static port for the SQL Server instance (always specifying the port value in the connection string), enable that TCP port in your server firewalls, and specify the public server name or its external IP address (provided that it is exposed outside the local network);
Enable trust between your source and destination domains (not applicable for connections “on the fly”).
Personally I decided to use the first workaround as it was the easier to implement and the most secure however If the problem persists, verify the server doesn't have an IPSEC policy that restricts access to the SQL Server port via IP address. That also could result in you being blocked.
Related
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)
Unable to connect to SQL Server remotely
I have installed SQL Server 2014 Express on Windows 10. I can connect to server locally by entering: computername\SQLEXPRESS or 192.168.0.xxx\SQLEXPRESS
When I try to connect to the server using public ipadress
122.xxx.xxx.xxx\SQLSERVER
I get an error:
Error: 26 - Error Locating Server/Instance Specified) (.Net SqlClient
Data Provider)
I also have host name from dlinkddns, tried connecting with host name with same error.
Steps which I have tried:
Enabled remote connections.
Configured 1433 TCP port to be allowed in firewall. Disabled antivirus program. I tried disabling firewall with no success.
Enabled all protocols "TCP/IP', 'Named Pipes', 'Shared memory'
Under TCP/IP properties, changed 'IP All' 'TCP Port' to 1433. I tried enabling IP1 to public ipadress with port 1433 with no success.
I have dlink DIR 816 router, i dont see anything called port forwarding instead it has 'port triggering', i configured to allow port 1433 TCP and 1434 UDP.
I can ping both ipadress and hostname with success but the server would not connect.
I have tried everything to the best of my knowledge but nothing works, any inputs to setup my connection remotely will be of great help!
The error is pretty specific here.
error: 26 - Error Locating Server/Instance Specified (.Net SqlClient Data Provider)
You must understand one thing. Your local IP (192.168.0.xxx) is not visible from WWW. Only your Public IP or Global IP is. Once someone comes inside your network they will be able to ping your IP (192.168.0.xxx).
To make it work, you must have the SQL Server installed in a computer whose local IP is accessible from the internet. That means, it should be hosted in a Domain.
Connecting to SQL Server over the Internet
We can connect to SQL Server remotely over the internet if the Server has a static public IP address and port forwarding is configured on the router to allow remote connection requests through the router firewall.
In the router firewall settings, there is normally a games and application section, in there add SQL application and give the port range (1433 normally) and then direct the incoming connection by selecting the SQL Server device name on the network.
I fixed the issue by adding local ip into DMZ on my router. Everything works like a charm now.
I have a website hosted on a shared server, and I have setup on server to allow remote connection, and also turned on to allow remote connections.
Also I have turned the firewall off.
I am able to log in to my SQL Server via our static ip and port from a different computer not on our network from SQL Server Management Studio, and also when I run my website on my local host,
But when I publish our website to our hosted server it will not connect to our database and return an error :
[Win32Exception (0x80004005): An attempt was made to access a socket in a way forbidden by its access permissions][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: 0 - An attempt was made to access a socket in a way forbidden by its access permissions.)]
This is our connection string
Data Source=000.000.00.00,12341;Integrated Security=False;
User ID=myUserNmae;password=myPassword;Initial Catalog=dBaseName;
What else could be wrong here?
you may have to open the program, not (simply) the port
http://technet.microsoft.com/en-us/library/cc646023.aspx
To add a program exception to the firewall using the Windows Firewall item in Control Panel.
On the Exceptions tab of the Windows Firewall item in Control Panel, click Add a program.
Browse to the location of the instance of SQL Server that you want to allow through the firewall, for example C:\Program Files\Microsoft SQL Server\MSSQL11.<instance_name>\MSSQL\Binn, select sqlservr.exe, and then click Open.
Click OK.
You'll want to read especially about "Dynamic Ports"
http://technet.microsoft.com/en-us/library/cc646023.aspx#BKMK_dynamic_ports
Can you try:
Data Source=127.0.0.1,12341;Integrated Security=False;
User ID=myUserNmae;password=myPassword;Initial Catalog=dBaseName;
Does the machine have an internal and external IP ? Aka, you may have to use the internal-IP (a real one, not just 127.0.0.1) for the IP address in the connection string.
to update you all if this issue might happen to you as well .
my website is hosted as shared hosting by hostgator and they claim that for security they will only allow traffic for sql to be done only via port 1433, which is the default port for sql...
hope this helps someone in the future
I have opened up port 1433 on my firewall, but every time I try and connect to my remote SQL Database with SQL Server Management Console I receive (Microsoft SQL Server, Error: 53)
https://social.technet.microsoft.com/wiki/contents/articles/2102.how-to-troubleshoot-connecting-to-the-sql-server-database-engine.aspx
http://blog.sqlauthority.com/2009/05/21/sql-server-fix-error-provider-named-pipes-provider-error-40-could-not-open-a-connection-to-sql-server-microsoft-sql-server-error/
http://blogs.msdn.com/b/walzenbach/archive/2010/04/14/how-to-enable-remote-connections-in-sql-server-2008.aspx
Enable remote connections for SQL Server Express 2012
Short Answer
Check Firewall
Check Service is Running
Check TCP/IP is Enabled
Check SQL Server Properties "Allow Remote Connections"
Check if the SQL Server is on a restricted subnet
Then Run these if Those Do not Resolve
Right-click on TCP/IP and select Properties.
Verify that, under IP2, the IP Address is set to the computer's IP address on the local subnet.
Scroll down to IPAll.
Make sure that TCP Dynamic Ports is blank.
Make sure that TCP Port is set to 1433.
If you have a named instance then you must have the SQL Server Browser Service enabled
The browser service runs on port UDP 1434 and this must be allowed through your firewall
Hail Mary Pass if this is Still not Resolved
Go to the client machine, and run cliconfg.exe If named pipes is listed first, demote it, and promote TCP/IP.
check if the firewall is blocking the named pipes port, which usually is 445
What you need to do is go into SQL Server Configuration Manager where SQL Server is installed.
In the Start Menu, under the Microsoft SQL Server folder, open the Configuration Tools folder and select SQL Server Configuration Manager.
In the Config Manager, click the arrow next to SQL Server Network Configuration, then click on "Protocols for {Instance}". {Instance} will be your install, if it's the default instance it will be MSSQLSERVER.
On the right side, make sure that TCP/IP is "Enabled". Double click TCP/IP, in the window that opens, change the drop down to "Yes".
Here is the how to fix it and gain your connectivity back:
Click WindowsKey + R and enter services.msc
Once Services opens scroll down and locate service SQL Server
Highlight the service and click START
Wait for the service to start and retry to connect to your MSSQL instance
It should now work again and you will be able to connect to your MSSQL instance and run queries.
I have solved this problem. Please refer to this thread: http://social.technet.microsoft.com/Forums/forefront/en-US/d2624655-e6ff-4947-b1a8-a2edcffd8a21/denied-connection-netbios-session-protocol#68321990-4ac4-46fa-b7f8-9e0ded3234bb
In detail: I was receiving the following error from ISA when trying to connect from my SBS 2003 Server to my offsite MSSQL Database Provider via SQL Server Management Studio:
Denied Connection
Log type: Firewall service
Status: A packet generated on the local host was rejected because its source IP address is assigned to one network adapter and its destination IP address is reachable through another network adapter.
Rule:
Source: Local Host ( 192.168.1.1:29859)
Destination: External (...:139)
Protocol: NetBios Session
I have figured this out. I had to add "Local Host" as one of the sources for the ISA Rule that I had initially created to allow SQL Server Management Console connections in the first place. That rule was allowing "Internal" sources but not the Local Host (127.0.01), which is needed for this scenario.
in SSMS while opening give the server name as your_Hostname\your_sqlservername (give both the names as applicable instead of local or just only servername) it works fine.
I could ping my Virtual Machine SQL server but couldn't connect to it.
I disabled my wired and wireless NICs and then it connected !
I'm running SQL Server 2008 Express on Windows XP on a VirtualPC instance inside a Windows XP host. I want to be able to connect to databases on the guest instance using SSMS on the host. When I go to connect from SSMS on the host, and browse for servers, I see the instance of SQL Server on the guest. Yet when I try to connect, using a SQL authentication login, I get the following connection 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: 28 - Server doesn't support requested protocol) (Microsoft SQL Server, Error: -1)
I have:
* tried connecting with both Name Pipes and TCP/IP
* ensured that the SQL Browser service is up
* ensured that the firewall on the guest is open
* the server is configured to allow remote connections (according to the database engine properties within SSMS on the guest)
What am I missing?
EDIT: I figured this out. My resolution is below.
SELF-ACCEPTED ANSWER
Thanks for the ideas. After much fiddling I got things working. It turned out that I had not gone into the Sql Server Configuration Manager and enabled TCP/IP and Named Pipes as network protocols. So even though SSMS said remote connections were enabled, there was no protocol to allow for them other than shared memory. After I did this I restarted the SQL Server service, but things still didn't seem to work properly. Yet once I had rebooted both the guest and host, everything was working as expected.
How are your IP settings? Are you sharing the same IP address between the two machines? If so, then perhaps when your clients attempt to connect to 10.1.1.10, it is hitting the IP of the machine hosting the VPC instance, and that machine is not running the SQL Server instance. If possible, have VPC get its own IP and try that.
Mostly double check what you have already said,
turn off the guest firewall to make sure it isn't that.
Make sure your virtual machine networking is set to bridged and not NAT.
Try connecting to the IP address of the guest instead of its name.
Make sure the remote connections are allowed by SQL server and that both client and server are using tcp/ip (or named pipes if you prefer).
I don't know if enabling remote connections requires a restart of SQL server.
Try using SQL authentication to eliminate an authentication issue. Are you running on a domain?
To add some steps that are not explicitly called out above, what worked in my experience was to set up the Virtual PC's Networking to my physical network adapter.
Then disabled Windows Firewall for the Public Profile.
Hopefully could actually lock that down to port 1433.
Also, on the guest OS, if SQL Server is installed with only Windows Auth, you later add SQL auth, note that by default 'sa' is disabled for login access. Either 'enable' Login for 'sa' or (better idea) create Logins with appropriate permissions as needed.