Question

I have an urgent situation

I write a logon trigger for disable to login from hacking programs but it blocked me to and none of the users cannot logon database my trigger is

  /****** Object:  DdlTrigger [connection_limit_trigger]    Script Date: 08/13/2011 08:43:04 ******/
SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO


ALTER TRIGGER [connection_limit_trigger]
ON ALL SERVER 
FOR LOGON
AS
BEGIN

   IF EXISTS (SELECT    row_count,* FROM sys.dm_exec_sessions  
   WHERE  1 = 1
        AND (program_name NOT IN ('myappname', 'Microsoft Office 2003','Microsoft Office 2007','Report Server','Microsoft SQL Server' ))        
        AND (program_name NOT LIKE '%Microsoft SQL Server Management Studio%') 
        OR host_name is not null


    )
    BEGIN
       ROLLBACK;
    END;
END;


--DROP TRIGGER connection_limit_trigger ON ALL SERVER

GO

SET ANSI_NULLS OFF
GO

SET QUOTED_IDENTIFIER OFF
GO

ENABLE TRIGGER [connection_limit_trigger] ON ALL SERVER
GO

now I cannot logon to database can I delete all triggers on sql ? is there any way to solve this problem.

Answer 1

If I’m understanding your question correctly, you are unable to logon due to a bug in the LOGON trigger you have created.

You can delete (DROP) the trigger under a Dedicated Administrator Connection (DAC).

sqlcmd -A -D master (as a sysadmin)

• Using a Dedicated Administrator Connection

• How to: Use the Dedicated Administrator Connection with SQL Server Management Studio