Mar 28, 2009 · 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.

Jun 27, 2023 · This article provides resolutions for the problem where users are not able to connect remotely to SQL Server using TCP/IP protocol.

May 5, 2023 · SQL Server and SQL Server Browser services are Running But it doesn't allow Local / Remote Telnet or Remote connection to the instance with the usual error: Network related / instance specific (Below screenshot)

Oct 31, 2023 · 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)

Feb 26, 2021 · If it is not there, you can copy one from another machine, or re-install SQL Server. Please refer to SQL Network Configuration 64bit is missing in SSCM which might help. If the solution above does not work, please take a look at this article which might help.

Aug 20, 2012 · For remote connection, NP and/or TCP protocols must be enabled. Once you enabled protocols in SCM, please make sure restart the SQL Server. You can open errorlog file to see if the server is successfully listening on any of the protocol.

Nov 3, 2017 · 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)

Check if your server allows connections via "Allow remote connections to this server" in the database properties page -> Connections. Make sure you can ping the server from the machine you are trying to connect from to ensure the SQL Server is reachable.

Oct 30, 2024 · Remote connections attempt TCP first, then named pipes. If both fail, only Named Pipes show up in the error. You are unable to connect to you SQL Server instance because of a networking issue. Assuming your SQL Server installation is using the default port configuration, you can run Test-NetConnection in powershell.

Mar 23, 2019 · Basically, when you failed to connect to your SQL Server, the issue could be: 1) Network issue, 2) SQL Server configuration issue. 3) Firewall issue, 4) Client driver issue, 5) Application configuration issue. 6) Authentication and logon issue.