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BI SQL # 132 : SQL Server DBA Scripts : Report Login Failures

Hi Folks,

In this article we are going to cover How to Report Login Failures.

In this post we are going to discuss following points:

  • Problem Statement of SQL Script:
  • Description of SQL Script:
  • Input Parameter of SQL Script
  • SQL Script Code
  • User Level to execute

Problem Statement of SQL Script:

Find the failed login attempts if any in given range of time?

Description of SQL Script:

To report the failed login attempts if any in given

Range of time.

Input Parameter of SQL Script

Specify the time limit parameter in minutes for the SP. Default is 15 mins.

Exec ReportLoginFailure 600

SQL Script Code

CREATE PROC ReportLoginFailure (@TimeinMin INT = 15)
AS
DECLARE @Count INT

CREATE TABLE #ErrorLog (
    ErrorLoggedDate DATETIME
    ,ProcessInfo NVARCHAR(50)
    ,ErrorText NVARCHAR(1000)
    )

INSERT INTO #ErrorLog
EXEC sp_readerrorlog

SELECT @Count = Count(*)
FROM #ErrorLog
WHERE ErrorText LIKE 'Login failed for user%'
    AND datediff(Minute, ErrorLoggedDate, getdate()) <= @TimeinMin

IF @Count > 0
BEGIN
    SELECT Report = Cast(@Count AS VARCHAR) + 
        ' Login Failures Reported in past ' + Cast(@TimeinMin AS VARCHAR) + 
        ' Minutes.'

    SELECT *
    FROM #ErrorLog
    WHERE ErrorText LIKE 'Login failed for user%'
        AND datediff(Minute, ErrorLoggedDate, getdate()) <= @TimeinMin
END
ELSE
    SELECT Report = 
        'No Login Failures Reported in the Specified Time Frame.'

DROP TABLE #ErrorLog
GO

User Level to execute

300

Hope you will like How to Report Login Failures.

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