The invention discloses a method, system and device for detecting a communication service abnormal behavior. The method comprises the steps that a detection device is used for detecting flow of a rear-end exchanger of a node device; if the abnormal behavior is found, alarming information is sent to the node device; the node device controls abnormality according to the alarming information. By means of the method, resources of the node device are saved, and safety is improved due to the fact that the node device does not need to detect if a request message is normal and if the behavior of communication service is abnormal.

Method, system and device for detecting communication service abnormal behavior

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Method, system and device for detecting communication service abnormal behavior