Penetration Testing with Kali Linux - Ddos Attack

What is Distributed Denial of Service (DDoS)?

Most of you have already heard of the ddos attack,  the ultime method used by anonymous group. But some of you know nothing about the attack and  how to use it, and also the way he walks.

Today on K4linux, let's talk a little about this famous attack which made the anonymous group outstanding.

In computing, a denial-of-service (DoS) or distributed denial-of-service (DDoS) attack is an attempt to make a machine or network resource unavailable to its intended users. Although the means to carry out, motives for, and targets of a DoS attack may vary, it generally consists of efforts to temporarily or indefinitely interrupt or suspend services of a host connected to the Internet. As clarification, DDoS (Distributed Denial of Service) attacks are sent by two or more persons, or bots (see botnet). DoS (Denial of Service) attacks are sent by one person or system. As of 2014, the frequency of recognized DDoS attacks had reached an average rate of 28 per hour.

A denial-of-service attack is characterized by an explicit attempt by attackers to prevent legitimate users of a service from using that service. There are two general forms of DoS attacks: those that crash services and those that flood services.

DDoS attacks are quickly becoming the most prevalent types of attacks, growing rapidly in the past year in both number and volume, according to recent market research. The trend is towards shorter attack duration, but bigger packet-per-second attack volume, and the overall number of attacks reported has grown markedly, as well.

During the Q4-2011, one survey found 45% more DDoS attacks compared to the parallel period of 2010, and over double the number of attacks observed during Q3-2011. The average attack bandwidth observed during this period was 5.2G bps, which is 148% higher than the previous quarter.

Another survey of DDoS attacks found that more than 40% of respondents experienced attacks that exceeded 1Gbps in bandwidth in 2013, and 13% were targeted by at least one attack that exceeded 10G bps.

There are two types of DDoS attacks: a network-centric attack which overloads a service by using up bandwidth and an application-layer attack which overloads a service or database with application calls. The inundation of packets to the target causes a denial of service. While the media tends to focus on the target of a DDoS attack as the victim, in reality there are many victims in a DDoS attack -- the final target and as well the systems controlled by the intruder. Although the owners of co-opted computers are typically unaware that their computers have been compromised, they are nevertheless likely to suffer a degradation of service and not work well. 

A computer under the control of an intruder is known as a zombie or bot. A group of co-opted computers is known as a botnet or a zombie army. Both Kaspersky Labs and Symantec have identified botnets -- not spam, viruses, or worms -- as the biggest threat to Internet security.

On the next articles we will make tutorials on how to use the ddos attack on Kali Linux with different programs and methods explaining every detail  to get closer to this attack which all media are talking about.

And as you already know all our tutorials are strictly educational purpose and we are not responsible for your actions. 

We share with you the information to perform your skills on security in all these domains, and it is the purpose of the creation of k4linux.

Source : Penetration Testing With Kali Linux - Ddos Attack