Feature Selection for Intrusion Detection using NSL-KDD

These days, network traffic is increasing due to the increasing use of smart devices and the Internet. Amount of the intrusion detection studies focused on feature selection or reduction because some of the features are irrelevant and redundant which results lengthy detection process and degrades the performance of an intrusion detection system (IDS). The purpose of this study is to identify important selected input features in building IDS that is computationally efficient and effective. For this we evaluate the performance of standard feature selection methods; CFS(Correlation-based Feature Selection), IG(Information Gain) and GR(Gain Ratio). In this paper, we propose a new feature selection method using feature average of total and each classes. We apply one of the efficient classifier decision tree algorithm for evaluating feature reduction method. We compare between proposed method and other methods. Key-Words: Data Mining, Preprocessing, Feature selection, Feature Reduction, Intrusion detection system, NSL-KDD