What is a DDoS Attack? DDoS stands for “Distributed Denial of Service.” A DDoS attack is a malicious attempt to make a server or a network resource unavailable to users, usually by temporarily interrupting or suspending the services of a host connected to the Internet. Unlike a Denial of Service (DoS) attack, in which one computer and one internet connection is used to flood targeted resource with packets, a DDoS attack uses many computers and many Internet connections. DDoS attacks can be broadly divided into three different types. The first, Application Layer DDoS Attacks include Slowloris, Zero-day DDoS attacks, DDoS attacks that target Apache, Windows or OpenBSD vulnerabilities and more. Comprised of seemingly legitimate and innocent requests, the goal of these attacks is to crash the web server, and the magnitude is measured in Requests per second. The second type of DDoS attack, Protocol DDoS Attacks, including SYN floods, fragmented packet attacks, Ping of Death, Smurf DDoS and more. This type of attack consumes actual server resources, or those of intermediate communication equipment, such as firewalls and load balancers, and is measured in Packets per second. The third type of DDoS attack is generally considered to most dangerous. Volume-based DDoS Attacks include UDP floods, ICMP floods, and other spoofed-packet floods. The volume-based attack’s goal is to saturate the bandwidth of the attacked site, and magnitude is measured in Bits per second. ©villu3
Posted on: Fri, 28 Nov 2014 06:07:54 +0000
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