使用DDL觸發器限制訪問的來源

use master

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Create TRIGGER Login_Check_Trigger
ON ALL SERVER
FOR logon
AS
BEGIN
DECLARE @ClientHost nvarchar(max);
SELECT @ClientHost = EVENTDATA().value('(/EVENT_INSTANCE/ClientHost)[1]','nvarchar(max)');
IF (left(@ClientHost,10)<> '192.168.18' or @ClientHost<>'<local machine>')--指定網段或本機
BEGIN
ROLLBACK TRAN;
END
END

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