They consume the entire bandwidth of the network or attacked sites by sending false data requests. Volumetric attacks are the most common type of DDoS attack. The most common type of application-layer attack is the HTTP flood. As these attacks involve fewer machines to generate higher volumes of traffic, it becomes difficult to identify whether the traffic is coming from a legitimate source or not. They primarily target the web pages generated on the server in response to the user’s HTTP requests. The goal of application-layer attacks is to exhaust the target’s resources entirely and crash the web server. The application layer is the top layer of the Open Systems Interconnection (OSI) model. The Distributed Denial of Service (DDoS) attacks are divided into three main categories:
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Types of DDoS Attacksīefore knowing how to prevent a DDoS attack, it’s crucial to understand their different types. In one of the biggest DDoS attacks ever, the BBC website was knocked out with over 600Gbps traffic. It gains effectiveness when multiple bots start sending requests to the targeted server or network to the extent its capacity overflows, which in turn leads to a denial of service. The threat actor controls the infected systems remotely with and sends them updated instructions to target a particular address. In a DDoS attack, the threat actor infects several computer systems or IoT devices with malware and converts them into a bot (zombie). They flood the regular traffic of the targeted network/server with a massive amount of internet traffic. Moreover, the cloud hosting provider Linode also became a victim of a malicious DDoS attack.ĭDoS attacks are hazardous. Recent examples include the Estonia Cyberattack (2007), Operation Ababil (2012-2013), Mirai IoT Botnet (2016). A DDoS attack is one of the most common cyber threats affecting business productivity and connectivity across the globe. However, with increased exposure to the internet and cloud, organizations’ threat surface also increases significantly. Businesses are moving their entire infrastructure to the cloud due to its incredible virtual services, proactive support, and better scalability.