| Summary: | Considering the characteristics of network traffic on the data link layer, such as massive high-speed data flow, information camouflaged easily, and the phenomenon that abnormal traffic is much smaller than the normal one, an intrusion detection system (IDS) based on the quantitative model of interaction mode between ports is proposed. The model gives the quantitative expression of Port Interaction Mode in Data Link Layer (PIMDL), focusing on improving the accuracy and efficiency of the intrusion detection by taking the arrival time distribution of traffic. The feasibility of the model proposed is proved by the phase space reconstruction and visualization method. According to the characteristics of long and short sessions, a neural network based on CNN and LSTM is designed to mine the differences between normal and abnormal models. On this basis, an improved Intrusion Detection algorithm based on a multi-model scoring mechanism is designed to classify sessions in model space. And the experiments show that the quantitative model and the improved algorithm proposed can not only effectively avoid camouflage identity information, but also improve computational efficiency, as well as increase the accuracy of small sample anomaly detection.
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