Cannot Connect To Sql Server Instance Error 26
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Cannot Connect To Sql Server Instance Remotely
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Sql Server Error 26 Client Unable To Establish Connection
error: 26 - Error Locating Server/Instance Specified up vote 15 down vote favorite 3 Well i have a big problem that i'm trying for days to solve but i could not do it, so i need your help. I have a web application in asp.net 4.0 where i implemented custom membership and role providers. When i open the app homepage in it connects to the
Error 26 Sql Server 2008 Management Studio
database and retrieves some information. There is also a login form and when i login it validates the user through the database and redirects me to the reserved pages but than this error appears: 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) Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Data.SqlClient.SqlException: 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) Source Error: An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exc
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Error 26 In Sql Server 2014
about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack error 26 in sql server 2008 Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping http://stackoverflow.com/questions/13754563/sql-network-interfaces-error-26-error-locating-server-instance-specified each other. Join them; it only takes a minute: Sign up Unable to connect to SQL Express "Error: 26-Error Locating Server/Instance Specified) up vote 11 down vote favorite 5 I am at an loose end with one particular box that is running SQL Express 2008 R2. Windows Firewall is configured to allow inbound TCP & UDP 1433, 1434. http://stackoverflow.com/questions/6466974/unable-to-connect-to-sql-express-error-26-error-locating-server-instance-speci 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) For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&EvtSrc=MSSQLServer&EvtID=-1&LinkId=20476 BUTTONS: OK 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 req
log in tour help Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might http://dba.stackexchange.com/questions/105693/how-do-i-troubleshoot-error-26-error-locating-server-instance-specified have Meta Discuss the workings and policies of this site About https://sqlbak.com/blog/sql-network-interfaces-error-26-error-locating-serverinstance-specified/ Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Database Administrators Questions Tags Users Badges Unanswered Ask Question _ Database Administrators Stack Exchange is a question and answer site for database professionals who wish sql server to improve their database skills and learn from others in the community. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top How do I troubleshoot error 26: “Error Locating Server/Instance Specified” up vote cannot connect to 4 down vote favorite I'm trying to configure TCP access to my SQL Server named instance (named SQL2012). I use management studio to connect to the database engine. I type in the server name: "tcp:localhost\SQL2012" and I receive this error message: (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified) This post by the SQL Server team seems to be really useful, in it they suggest testing out the SqlBrowser service using PortQry. When I do, I get this info: Querying target system called: localhost Attempting to resolve name to IP address... Name resolved to 127.0.0.1 querying... UDP port 1434 (ms-sql-m service): LISTENING or FILTERED Sending SQL Server query to UDP port 1434... Server's response: ServerName MSWART7 InstanceName SQL2012 IsClustered No Version 11.0.5058.0 tcp 52329 ♥K K P☺K 5 - 2 1 qK 1 4 rK 8 7 0☺ 1 qK ==== End of SQL Server query response ==== And sure enough, I'm able to connect to the database when I specify the
10 Average: 2.6/5] Sometimes you may see "SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified" error message when connecting to a SQL Server and don't know where to start. In most forums people say this is because remote connection is not enabled on the server. This is not exactly correct. Actually, this error message gives customers a very specific information and the solution is quite simple. First of all, you get this error message only if you are trying to connect to a SQL Server named instance. For a default instance you never see this. Why? Because even if we have failed at this stage (i.e. error locating server/instance specified), we will continue to try connect using default values, e.g default TCP port 1433, default pipe name for Named Pipes. You may see others error messages due to failure later, but not this error message. Every time client makes a connection to SQL Server named instance, we will send a SSRP UDP packet to the server machine UDP port 1434. We need this step to know configuration information of the SQL instance, e.g., protocols enabled, TCP port, pipe name etc. Without this information, a client does know how to connect to the server and it fails with this specific error message. In other wors, the reason that we get this error message is the client stack could not receive SSRP response UDP packet from SQL Browser. It's easy to resolve the issue. Here are the 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. (Try to use a connection string like .