Improving Network Intrusion Detection Performance : An Empirical Evaluation Using Extreme Gradient Boosting (XGBoost) with Recursive Feature Elimination

In cybersecurity, Network Intrusion Detection Systems (NIDS) are essential for identifying and preventing malicious activity within computer networks. Machine learning algorithms have been widely applied to NIDS due to their ability to identify complex patterns and anomalies in network traffic. Improvements in the performance of an IDS can be measured by increasing the Matthew Correlation Coefficient (MCC), the reduction of False Alarm Rates (FARs), and the maintenance of up-to-date signatures of the latest attacks to maintain confidentiality, integrity, and availability of services. Integrating machine learning with feature selection for IDSs can help eliminate less important features until the optimal subset of features is achieved, thus improving the NIDS.In this research, we propose an approach for NIDS using XGBoost, a popular gradient boosting algorithm, with Recursive Feature Elimination (RFE) feature selection. We used the NSL-KDD dataset, a benchmark dataset for evaluating NIDS, for training and testing. Our empirical results show that XGBoost with RFE outperforms other popular machine learning algorithms for NIDS on this dataset, achieving the highest MCC for detecting NSL-KDD dataset attacks of type DoS, Probe, U2R, and R2L and very high classification time.