DDoS attacks and methods to prevent it


Although DDoS has been used for several years, it still has a sophisticated structure and at the same time is the simplest type of attack. Systems that run the DDoS attack will end up with devastating consequences, which will further investigate the attack and its consequences. 

DDoS stands for Distributed Denial of Service; in this way, the attackers, having a chain of computers, send a large volume of requests to the destination servers, which ultimately occupy all the traffic to the desired servers, disrupting its service be.

DDoS is one of the most common attacks ever launched on the world-known technology web sites. The consequences of these attacks affect the company's millionth revenue and even its brand. Most attackers do not seek to steal personal information and account, some of these hackers are simply seeking to unlock important websites, in which case the company will suffer too much damage. These attacks are like street harassment, although they do not steal people's property, but they disturb the work and play! The DDoS attack also uses this idea, and it's based on the same disturbance on the street.

The goal of a hit attack is to disturb the normal performance of a particular website; performance-like visions are not accidental; the purpose of the viruses is not just for a user, but for all users, but the vista is scheduled to be set up solely for a specific purpose. In general, the goal is to reach out to a particular website for its users and its daily visitors.

What is "distributed" attack?

What is distributed attack is the team effort of distributed systems with a specific purpose to access the website; in fact, the idea of an attack between thousands and several computers has been distributed to launch the attack. When the attack is launched, users are not able to see the website. Even in the worst case, the website rejects users' service, which is causing financial loss and the loss of profitability; furthermore, the attack could be a loss to the website's permanent users.

The most common type of attack :

The most common way to execute a visage attack is to send the information request to the server in a flood. The goal is to create a huge wave of fake traffic (more than the amount of traffic the web server can handle and process) to prevent a typical user from accessing the website; thus, the service is stopped by the customers of this website.

For a better understanding of the subject, consider a store that is crowded with customers that cause congestion and disturbance for the purchase of real customers; unrealistic requests for a hit attack like these customers.

In Christmas 2014, a hit attack on the Xbox Live servers and the PlayStation Network. Thousands of gamblers were barred from playing and could not continue to play. The Lizard Squad team seized the attack and even claimed that six months ago, attacks on PlayStation servers and World of Warcraft and the League of Legends have been launched.

As one of the news sources reports, hackers are currently using strategies that have been tested until the entire website runs out; strategies that retest in the long run! The attack on Sony's servers not only spoiled information, but also created great troubles for Sony and its supporters. Sources of news have said that these types of attacks are expanding, and the statistics are being updated day by day. According to one of these statistics, the Vida's attack has tripled over the same period last year over the past three months.

According to security experts, these days, attacks targeting a selected weapon have become some of the hackers, due to the availability of up-to-date technologies. Today, hackers can easily rent a network of infected computers; this network called the bot is used to execute cybercrime attacks. (The computers of this network are called zombies). Hackers can even use regular users' computers as zombies to send unrealistic requests to the target website without the user knowing it. One way of penetrating ordinary users' computers is to download the infected file; to prevent this, it's suggested that you keep antivirus up to date and avoid downloading unknown files

Legal authorities have shown a lot of sensitivity to these types of attacks, as they are seriously following the attacks, and continue the process until they find the attacker. One way to find an attacker and a hacker is to track down the IP address, which, of course, is a timely and somewhat lucky one, although sometimes hackers leave some clues that can expedite them. For example, a computer engineering student from Florida hacked a website by uploading multiple files on it and then tweets related to the attack on Twitter. The mistake that the hacker committed was that he published tweets through his personal system, which prompted him to be identified quickly through IP; FBI could quickly locate his address and arrest him in his own house.

The same thing happened to a gamer, she had a Dadish attack on the Call of Duty site. As a result, he was able to win all the points in the game and prevent other gamers from playing. His cheat strategy was successful in the game; however, he had made a hack from his personal computer that was tracked, identified, and eventually arrested via the IP address.

Difference between DoS and DDoS

The DoS attack is different from a DDoS attack, and is different in zombies; the DoS uses a computer and an Internet connection for attack, while DDoS employs multiple computers and different resources. DDoS attacks are generally global and have distributed botnets in multiple locations.

Different types of DDoS attacks

There are several types of attacks, but there are generally two categories of common DDoS attacks:

Traffic attacks: In this type of DDoS attack, a huge amount of TCP, UDP, and ICPM requests are sent to the target system. Meanwhile, some requests are lost, while others are successfully exploited by malware.

Bandwidth attacks: In this type of attack, zombie systems send a large amount of unused information in order to occupy the bandwidth of the victim machine. As a result, the goal is completely out of reach and its access to all sources is cut off.

Preventing DDoS attacks

Vulnerabilities against these types of attacks are more likely to return to the server's security. To secure the server, there are various solutions to secure the server, which depends on the configuration of the sipanel and the direct admin, the following have a significant impact on server security:

  • Securing the operating system kernel
  • Securing php service
  • Securing the web server installed on nginx, apache, litespeed and lighthttpd
  • Secure server open ports
  • Securing perl scripts that are risk-free when open
  • Securing scripts under php
  • Securing the security of scripts under the python
  • Secure the server for not running common malware
  • Install and configure antivirus proxy for server auto-scan
  • Install and configure the Anti-Shell Professional to automatically scan the server to prevent shell and malware activity on the server.
  • Symlink immunity to prevent other hosts on the server
  • Close Access to Dangerous Operating Systems for More Security
  • Close ports and remove unnecessary server services

Keep in mind that even the world's largest technology companies are suffering several types of cybercrime attacks every day, so security is never 100% guaranteed. However, with the observance of the items mentioned and the daily monitoring of the security of the website and the web server, some of these attacks can be prevented.
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Comments 1

Kadheer Kadheer on Thursday, 07 June 2018 05:19

Great hammed this will be helfull and great to learn

Great hammed this will be helfull and great to learn
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Wednesday, 12 December 2018