How To Solve Error 26 In Sql Server 2008
★★★★★★★★★★★★★★★ SQL Server ConnectivityMay 13, 2007286 0 0 0 Users often see this error message when connection to a SQL Server and don't know where to start to solve the problem. In most forums, people says this is because remote connection is not enabled on the server. This is not exactly correct. Actually, this error message give customers 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 default instance, you never see this. Why? Because even if we failed at this stage (i.e. error locating server/instance specified), we will continue to try connect using default values, e.g defaul TCP port 1433, default pipe name for Named Pipes. You may see other error message 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 these information, client does know how to connect the server and it fails with this specified error message. In a word, 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 isolate the issue. Here are the steps:1) Make sure your server name is correct, e.g., no typo on the name. 2) Make sure your instance name is correct and there is actually such an instance on your target machine. [Update: Some application converts \ to . If you are not sure about your application, please try both ServerInstance and Server\Instance in your connection string]3) Make sure the server machineis reachable, e.g, DNS can be resolve correctly, you are able to ping the server (not always true). 4) Make sure SQL Browser service is running on the server.5) If firewall is enabled on the server, you need to put sqlbrowser.exe and/or UDP port 1434 into exception. Once you are done th
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 developers or posting ads with us Stack 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 https://blogs.msdn.microsoft.com/sql_protocols/2007/05/13/sql-network-interfaces-error-26-error-locating-serverinstance-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 12 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 requests
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ASP.NET Community Standup Forums Help Home/ASP.NET Forums/Community/Tips & Tricks/error: 26 - Error Locating Server/Instance Specified error: 26 - Error Locating Server/Instance Specified RSS 5 replies Last post Apr 25, 2016 10:05 AM by JohnsonWelch ‹ Previous Thread|Next Thread › Print Share Twitter Facebook Email Shortcuts Active Threads Unanswered Threads Unresolved Threads Support Options Advanced Search Reply kutting Member 33 Points 49 Posts error: 26 - Error Locating Server/Instance Specified Dec 02, 2009 12:21 AM|kutting|LINK Hi Guys, If you are facing problem with connecting to SQL Server through ur application. And getting following error "An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)" Step 1. Check if you can login to your SQL Server Managed Studio using ur user Name and pwd. Example using ur sa account which is ur default account If not the then follow following steps Change the authentication mode to mixed from Windows, Following are the steps to be followed. In SQL Server Management Studio Object Explorer, right-click the server, and then click Properties. On the Security page, under Server authentication, select the new server authentication mode "SQL Server and Windows Authentication mode", and then click OK. In the SQL Server Management Studio dialog box, click OK to acknowledge the requirement to restart SQL Server To Enable the sa login. In Object Explorer, expand Security, expand Logins, right-click sa, and then click Properties. On the General page,