FIDS: Fuzzy Intrusion Detection System for simultaneous detection of DoS/DDoS attacks in Cloud computing

In recent times, I've encountered a principle known as cloud computing, a model that simplifies user access to data and computing power on a demand basis. The main objective of cloud computing is to accommodate users' growing needs by decreasing dependence on human resources, minimizing expenses, and enhancing the speed of data access. Nevertheless, preserving security and privacy in cloud computing systems pose notable challenges. This issue arises because these systems have a distributed structure, which is susceptible to unsanctioned access - a fundamental problem. In the context of cloud computing, the provision of services on demand makes them targets for common assaults like Denial of Service (DoS) attacks, which include Economic Denial of Sustainability (EDoS) and Distributed Denial of Service (DDoS). These onslaughts can be classified into three categories: bandwidth consumption attacks, specific application attacks, and connection layer attacks. Most of the studies conducted in this arena have concentrated on a singular type of attack, with the concurrent detection of multiple DoS attacks often overlooked. This article proposes a suitable method to identify four types of assaults: HTTP, Database, TCP SYN, and DNS Flood. The aim is to present a universal algorithm that performs effectively in detecting all four attacks instead of using separate algorithms for each one. In this technique, seventeen server parameters like memory usage, CPU usage, and input/output counts are extracted and monitored for changes, identifying the failure point using the CUSUM algorithm to calculate the likelihood of each attack. Subsequently, a fuzzy neural network is employed to determine the occurrence of an attack. When compared to the Snort software, the proposed method's results show a significant improvement in the average detection rate, jumping from 57% to 95%.