Resolve The Problem To Resolve Microsoft SQL Server Error 18452.
October 27, 2021
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Over the past few days, some of our readers have encountered a known error code in Microsoft SQL Server Error Resolution 18452. This issue can occur for several reasons. We will talk about this below.
The recently specified user reported error 18452 while connecting to the database server. A full description of this error can be found below:
Error: 18452, 14, Severity: State: 1.
Connection error. Entrance from a new large precarious houseit cannot be used with Windows Authentication.
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You can see a basic screenshot of error 18452 in the image below.
Error 18452 Root Cause
Go to Start> Programs> Microsoft SQL Server> Enterprise Manager.Expand the tree until you see your server.Right click to open your server.Select the Security tab.In the Authentication section, select SQL Server and Windows.Click OK.
Error 18452 is caused by incorrect authentication mode setting. SQL Server is configured to accept individual Windows connections that connect to the index instance.
As we know, SQL Server uses two modes of authentication to accept connections to the repository. One is Windows Authentication Method and the other is SQL Server and Windows Authentication Mode. We could call this mixed mode authentication.
SQL Server Authentication Mode is sometimes set so that SQL Server and Windows Authentication will accept SQL logins almost as well as Windows logins, but you will still run into this issue. This can usually be due to the fact that you are trying to connect to a server that still reflects the configuration of the availability group or the configuration of the database.
Suppose you also have an AOAG setup and connect to a database that manages the primary namereplica, rather than the brand of the receiver, using a connection whose default database is defined as specific availability dates. If a failover occurs during our activity, or if you are connecting to the secondary replica using the default browse database and set only as free / busy database, you can also get this 18452 error with the SSPI context error I noted below. …
Error: 17806, 20, Severity: State: 14.
SSPI negotiation failed with error code 0x8009030c, state 14 when establishing an Integrated Security connection; The connection was closed. Reason: AcceptSecurityContext failed. The Windows error procedure indicates the cause of the error. The connection attempt failed.
The SSPI handshake is actually catching errors due to a Kerberos error, which, unfortunately, is most likely due to a non-existent SPN or a bad SPN related to SQL Server.
Solution
To solve this awesome problem, we first need to check the validation mode of your SQL Server instance. If the SQL Server crash is runningWith Windows with authentication warning, you will need to change it to actually enable mixed mode so that Windows and SQL can potentially authenticate both types of connections.
To check the certification mode configured for your SQL instance, we need to launch the properties window of the SQL Server instance. Right click on the instance node and select the Properties option as shown in the screenshot.
After clicking on the “Properties” option, you can go to the window with the properties of the SQL server instance. On the remote sidebar, select the Security on option. You can see the current server authentication configuration that windowed authentication can use in the screenshot below. We
is now changed to SQL Server and Windows Authentication Mode. Check the radio button for SQL Server Mode and Windows Authentication above, click OK to continue. As you can see, I have selected the above registry modification mode.
This way, if your SQL Server instance is set to both SQL and Windo authentication modesws Computer, you have to solve this problem separately. As I described above, this points to the likely cause of this 18452 error, as you can use the AOAG replica server name diversity database.
If a failover occurs, you will not be able to access your database because it will be secondary. Error 18452 is generated during SSPI handshake errors because the old database is set as the default directory for your connection. is now unavailable because the secondary database is running in AOAG. Fault tolerance is far from possible because you usually use the replica server name to establish a database connection.
One possible solution to this actual problem is to restore AOAG on your old primary replica, for which you must use the AOAG listener name to establish a database connection. To avoid this failover failure during this time, you will also need to set a default database for your nameuser as master instead of mounting the database.
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Yes. Mister. worked as a technical architect in one of the leading IT consulting companies. I have experience with all versions of SQL Server through SQL Server 2000. I have worked on consolidating several SQL Server projects like updates, migrations, HA and DR. I love to share my knowledge. You can contact me with any questions regarding my debts.
Latest posts by Manvendra Deo (show all)
I work as a technicalarchitect in one of the largest IT consulting companies. I am counting all versions of SQL Server starting from SQL Server 2000. I want to combine multiple SQL Server projects such as updates, migrations, HA and DR. I would like to share my experience. You can contact me through social group accounts for any work-related questions.
Fixed error 18452: Connection failed. The logon is from an untrusted realm and cannot be used as Windows authentication.
We recently received an access issue where one of the SQL users could not get the database instance and had error 18452. Description The complete error for this error is listed below: Error: 18452, Severity: 14 , Condition: 1.Connection error. Unable to create a connection from a trusted untrusted domain using Windows Authentication.
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Check if TCP / IP is enabled. go – All Programs -> Microsoft SQL Machine 2008 -> Configuration Tools -> Launch SQL Server Configuration Manager. To the left of the user select Client Practices (depending on your 32- or 64-bit operating system). Activate the TCP / IP protocol activated on the right side.
Go to Start> All Programs> Microsoft SQL Server> Configuration Tools> SQL Server Surface Area Configuration.Click Add New Administrator.Navigate to SQLEXPRESS SQL Server System Administrator Role Member and add it to the right field.Click OK.
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