Cannot Connect To Mssql Server 2008 Error 26
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Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up SQL Network cannot connect to sql server 2008 r2 express remotely Interfaces, 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 cannot connect to local sql server 2008 to the 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
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4.7 million programmers, just like you, helping 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 http://stackoverflow.com/questions/13754563/sql-network-interfaces-error-26-error-locating-server-instance-specified 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. 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: http://stackoverflow.com/questions/6466974/unable-to-connect-to-sql-express-error-26-error-locating-server-instance-speci 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 requests for 1433 UDP or anything from my external IP (with filtering to remote RDP from results). This makes me think it is a firewall issue. The server is hosted by an external company who have control over the PIX in front of our server. I need to troubleshoot this as much as possible myself as the hosting company have no clue what they are doing. sql sql-server sql-server-2008 sql-server-express-2008 share|improve this question edited Jun 7 '15 at 15:58 Mark Amery 23.5k12118148 asked Jun 24 '11 at 11:16 0x
log in tour help Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring http://dba.stackexchange.com/questions/105693/how-do-i-troubleshoot-error-26-error-locating-server-instance-specified developers or posting ads with us Database Administrators Questions Tags Users Badges Unanswered Ask Question http://www.isunshare.com/sql-server/solve-sql-server-connection-error-26.html _ Database Administrators Stack Exchange is a question and answer site for database professionals who wish 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 cannot connect error 26: “Error Locating Server/Instance Specified” up vote 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 cannot connect to 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 server name "tcp:localhost,52329" I'm not sure what I'm missing. SQL Browser seems to be functioning and ports and firewalls seem to be open or irrelevant (I'm trying to connect to localhost). Where do I look next? sql-server sql-server-2012 connectivity share|improve this question edited Jul 26 '15 at 15:50 Aaron Bertrand♦ 113k14195333 asked Jul 1 '15 at 16:46 Michael J Swart 88321123 If you use (local) or 127.0.0.1 or MSWART7 or the actual IP address instead of localhost, does anything change? What network protocols are enabled in Configuration Manager? (I don't know that you can specify tcp: successfully when using a named instance name, which implies Shared Memory. I can't connect on any of mine that way - I either need to use tcp: with a port, or no tcp: with a name.) –Aaron Bertrand♦ Jul 1 '15 at 18:39 T
PowerPoint Password Genius Access Password Genius Outlook Password Genius SQL Password Genius Data Tools Data Genius Card Data Genius Photo Data Genius iOS Data Genius Product Key Tools Product Key Finder Boot Tools iOSBoot Genius Utilities CocoGenius Downloads Store Support Resources Home > Resources > Password > Solve SQL Server Connection Error 26 Solve SQL Server Connection Error 26 - Error Locating Server/Instance Specified While SQL Server client unable to establish connection to server, or SQL network interfaces error 26 occurs, you cannot locate server or instance specified, how to resolve it? In following article, solutions will be provided to fix SQL Server connection error 26 occurring in SQL Server 2005/2008. Part 1: Resolve SQL Server 2005 Connection Error 26 Part 2: Solutions to Error Locating Server/Instance Specified in SQL Server 2008 Part 1: Resolve SQL Server 2005 Connection Error 26 If it is just because of failed remote connection, try this way to open SQL Server 2005 remote connection. Open Remote Connection in SQL Server Surface Area Configuration. 1. Open SQL Server Surface Area Configuration in Start > All Programs > Microsoft SQL Server 2005 > Configuration Tools > SQL Server Surface Area Configuration. 2. Navigate to Surface Area Configuration for Services and Connections > Database Engine > Remote Connections. Choose Local and remote connections and click Apply and OK to confirm these changes. 3. Restart SQL Server Services and connect SQL Server to server or instance specified. If for wrong server name or instance, please add instance name after server name "\". Or remove "\" and instance after it, or directly type "." after server name. Part 2: Solutions to Error Locating Server/Instance Specified in SQL Server 2008 After installing SQL Server 2008 on computer, if directly connect to server or instance specified, probably you would encounter such a problem. Provider: SQL Network Interfaces, error: 26 - Error Locati