Ddos attacks
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DDOs Attacks (Distributed Denial of Service Attacks DoS Basics What is Internet? What resources you access through Internet? Who uses those resources? Good vs Bad Users Denial-of-Service attack -DoS attack is a malicious attempt by a single person or a group of people to cause the victim, site, or node to deny service to its customers. -What is (DoS)Attack An attack that attempts to stop or prevent a legitimate user from accessing a service or system. The attacker will either directly attack the users network or system or the system or service that the users are attempting to access. -Distributed denial of service attack (DDoS) This type of attack is distributed among many different systems making it more powerful and harder to shutdown
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This is a presentation i made about Denial of Service or a Distributed Denial of Service (DoS / DDoS) and the latest methods used to crash anything online and the future of such attacks which can disrupt the whole internet . Such attacks which are in TB's and can be launched from just single computer. And, there is not much that can be done to prevent them.
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A DOS attack is designed to deny legitimate users access to a resource by overwhelming it with requests. There are two main types: a basic DOS attack from a single host, and a distributed DOS (DDOS) attack from multiple compromised machines targeting the same victim. To prevent DOS attacks, organizations can install security patches, use intrusion detection systems to identify illegal activities, configure firewalls to block traffic from attackers, and use access control lists on routers to limit network access and drop suspicious traffic.
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This document discusses denial of service (DoS) and distributed denial of service (DDoS) attacks. It defines DoS as an attack that seeks to oversaturate a targeted machine's capacity to disrupt authorized use, while a DDoS uses multiple compromised systems to flood the target. The document describes how DDoS attacks work by flooding the victim from many sources, making it hard to block. It lists common DoS attacks like buffer overflow and ICMP floods, and DDoS attack types like traffic floods and application attacks. The document also covers typical attacker motivations and recommendations to prevent attacks like buying more bandwidth and building redundancy.
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The document discusses denial of service (DoS) and distributed denial of service (DDoS) attacks. It defines DoS as an attack that renders a system unable to provide normal services by flooding it with traffic. DDoS uses multiple compromised systems to launch a coordinated DoS attack against one or more targets, multiplying the attack effectiveness. Attacks are classified by the system targeted (clients, routers, firewalls, servers), part of the system (hardware, OS, TCP/IP stack), and whether they exploit bugs or just overload resources. Common DDoS tools like Trinoo and TFN are mentioned. Protection from these large-scale attacks remains a challenge.
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A DOS attack is designed to deny legitimate users access to a resource by overwhelming it with requests. There are two main types: a basic DOS attack from a single host, and a distributed DOS (DDOS) attack from multiple compromised machines targeting the same victim. To prevent DOS attacks, organizations can install security patches, use intrusion detection systems to identify illegal activities, configure firewalls to block traffic from attackers, and use access control lists on routers to limit network access and drop suspicious traffic.
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This document discusses denial of service (DoS) and distributed denial of service (DDoS) attacks. It defines DoS as an attack that seeks to oversaturate a targeted machine's capacity to disrupt authorized use, while a DDoS uses multiple compromised systems to flood the target. The document describes how DDoS attacks work by flooding the victim from many sources, making it hard to block. It lists common DoS attacks like buffer overflow and ICMP floods, and DDoS attack types like traffic floods and application attacks. The document also covers typical attacker motivations and recommendations to prevent attacks like buying more bandwidth and building redundancy.
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DDoS attacks target companies and institutions that provide online services. They work by overloading servers with traffic from multiple compromised systems known as "bots" or "zombies". Common DDoS attack types include SMURF, TCP SYN/ACK, UDP flood, DNS amplification, and attacks using peer-to-peer networks. Defenses include configuring routers and firewalls to filter unauthorized traffic, limiting response messages, and tracking malicious activity on peer-to-peer networks. As attack methods evolve, continued development of detection and mitigation techniques is needed.
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This Presentation is useful to study about Denial of Service Attack or DoS Attack. This Presentation is also useful to make PPT on this topic.
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Materi yang diberikan sudah disusun oleh Pakar yang merupakan Trainer CEH dan memang berkompeten dibidang keamanan jaringan.
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Semoga bermanfaat sebagai acuan bagi kita untuk belajar tentang keamanan jaringan komputer.
Terimakasih
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This Presentation is useful to study about Denial of Service Attack or DoS Attack. This Presentation is also useful to make PPT on this topic.
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Slide berikut merupakan slide yang berisikan dasar-dasar bagi kita dalam memahami konsep keamanan jaringan komputer, baik dari sisi inftrastruktur, teknologi dan paradigma bagi pengguna.
Materi yang diberikan sudah disusun oleh Pakar yang merupakan Trainer CEH dan memang berkompeten dibidang keamanan jaringan.
Slide ini saya dapatkan dari beliau saat mengikut training Certified Computer Security Officer (CCSO) dan Certified Computer Security Analyst (CCSA) dari beliau.
Semoga bermanfaat sebagai acuan bagi kita untuk belajar tentang keamanan jaringan komputer.
Terimakasih
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This document discusses denial of service (DoS) attacks and distributed denial of service (DDoS) attacks. It defines DoS attacks as aiming to render a device unavailable by overwhelming it with requests. DoS attacks typically use a single computer, while DDoS attacks use many distributed sources. The document explains that DoS attacks work by buffer overflow or flooding the target with packets to oversaturate its capacity. It provides indicators that a computer may be experiencing a DoS attack and notes that the main difference between DoS and DDoS is that DDoS uses many infected sources in a botnet rather than a single source.
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Consider what you have learned so far about Denial of Service as you review the objectives and scenario below. Complete the lab that follows on EC-Council's website using the link below.
Objective
Denial of Service (DoS) is an attack on a computer or network that prevents legitimate use of its resources. In a DoS attack, attackers flood a victim’s system with illegitimate service requests or traffic to overload its resources and prevent it from performing intended tasks.
The objective of this lab is to help students learn to perform Denial of Service attacks and test a network for DoS flaws. In this lab, you will:
Perform a DoS attack by sending a large number of SYN packets continuously
Perform an HTTP flooding attack
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Scenario
In computing, a denial-of-service (DoS) attack is an attempt to make a machine or network resource unavailable to its intended users. Although the means, motives, and targets of a DoS attack may vary, it generally consists of the efforts of one or more people to temporarily or indefinitely interrupt or suspend services of a host connected to the Internet.
Perpetrators of DoS attacks typically target sites or services hosted on high-profile web servers such as banks, credit card payment gateways, and even root nameservers.
One common method of attack involves saturating the target machine with external communications requests so that it cannot respond to legitimate traffic, or it responds so slowly as to be rendered essentially unavailable. Such attacks usually lead to a server overload. DoS attacks can essentially disable your computer or your network. DoS attacks can be lucrative for criminals; recent attacks have shown that DoS attacks are a way for cybercriminals to profit.
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Lab Task:
The objective of this lab is to help students learn how to perform a DDoS attack—in this case, HTTP Flooding.
Lab Description:
A distributed denial of service (DDoS) attack is a more sophisticated form of DoS attack in which, in some cases, it is difficult to trace the attackers. A DDoS attack is a large-scale, coordinated attack on the availability of services on a victim’s system or network, launched indirectly through many compromised computers on the Internet.
A DDoS attack uses many computers to launch a coordinated DoS attack against one or more targets. Using client/server technology, the perpetrator is able to multiply the effectiveness of the DoS significantly by harnessing the resour.
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International Journal of Computational Engineering Research(IJCER) is an intentional online Journal in English monthly publishing journal. This Journal publish original research work that contributes significantly to further the scientific knowledge in engineering and Technology
Study of flooding based ddos attacks and their effect using deter testbed
Abstract Today, Internet is the primary medium for communication which is used by number of users across the Network. At the same time, its commercial nature is causing increase vulnerability to enhance cyber crimes and there has been an enormous increase in the number of DDOS (distributed denial of service attack) attacks on the internet over the past decade. Whose impact can be proportionally severe. With little or no advance warning, a DDoS attack can easily exhaust the computing and communication resources of its victim within a short period of time. Network resources such as network bandwidth, web servers and network switches are mostly the victims of DDoS attacks. In this paper different types of DDoS attacks has been studied, a dumb-bell topology have been created and effect of UDP flooding attacks has been analyzed on web service by using attack tools available in DETER testbed. Throughput of web server is analyzed with and without DDoS attacks.
Study of flooding based d do s attacks and their effect using deter testbed
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
Adarsh-PPT-FCF-12-thm.ppt
This document discusses denial of service (DoS) attacks. It provides a brief history of DoS attacks, including the Morris Worm in 1988 and the SQL Slammer worm in 2003. These early attacks demonstrated how rapidly DoS malware could spread through networks and bring infrastructure to a halt. The document outlines different types of DoS attacks such as penetration tests, eavesdropping, man-in-the-middle attacks, and flooding. Common targets today and defenses against DoS attacks like firewalls and routers are also mentioned. The conclusion discusses how international boundaries complicate law enforcement against DoS attackers and how future attacks may aim to broadly destabilize networks rather than target specific sites.
PASSWORD BASED SCHEME AND GROUP TESTING FOR DEFENDING DDOS ATTACKS
DOS ATTACKS ARE ONE OF THE TOP SECURITY PROBLEMS AFFECTING NETWORKS AND DISRUPTING SERVICES TO
LEGITIMATE USERS. THE VITAL STEP IN DEALING WITH THIS PROBLEM IS THE NETWORK'S ABILITY TO DETECT SUCH
ATTACKS. APPLICATION DDOS ATTACK, WHICH AIMS AT DISRUPTING APPLICATION SERVICE RATHER THAN
DEPLETING THE NETWORK RESOURCE. UP TO NOW ALL THE RESEARCHES MADE ON THIS DDOS ATTACKS ONLY
CONCENTRATES EITHER ON NETWORK RESOURCES OR ON APPLICATION SERVERS BUT NOT ON BOTH. IN THIS PAPER
WE PROPOSED A SOLUTION FOR BOTH THESE PROBLEMS BY AUTHENTICATION METHODS AND GROUP TESTING.
PASSWORD BASED SCHEME AND GROUP TESTING FOR DEFENDING DDOS ATTACKS
DOS ATTACKS ARE ONE OF THE TOP SECURITY PROBLEMS AFFECTING NETWORKS AND DISRUPTING SERVICES TO LEGITIMATE USERS. THE VITAL STEP IN DEALING WITH THIS PROBLEM IS THE NETWORK'S ABILITY TO DETECT SUCH ATTACKS. APPLICATION DDOS ATTACK, WHICH AIMS AT DISRUPTING APPLICATION SERVICE RATHER THAN DEPLETING THE NETWORK RESOURCE. UP TO NOW ALL THE RESEARCHES MADE ON THIS DDOS ATTACKS ONLY CONCENTRATES EITHER ON NETWORK RESOURCES OR ON APPLICATION SERVERS BUT NOT ON BOTH. IN THIS PAPER WE PROPOSED A SOLUTION FOR BOTH THESE PROBLEMS BY AUTHENTICATION METHODS AND GROUP TESTING.
A vivacious approach to detect and prevent d do s attack
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
Study of System Attacks- DoS.pptx
The document discusses trends in denial of service (DoS) attacks from Q1 2023. Some key points:
- Israel emerged as the top targeted country for HTTP DDoS attacks, surpassing the US. Gaming/gambling was the most targeted industry in several regions.
- Finland was the largest source of HTTP attack traffic, while Vietnam was the largest source of network layer attacks.
- DNS amplification became the most common attack vector, comprising 30% of attacks, followed by SYN floods at 22% and UDP-based attacks at 21%.
The document analyzes recent shifts in target countries/industries and attack vectors used in DoS attacks in the first quarter of 2023.
IRJET- EEDE- Extenuating EDOS for DDOS and Eluding HTTP Web based Attacks in ...
This document proposes a method to detect HTTP GET flooding DDoS attacks in cloud computing environments using MapReduce processing. It involves integrating abnormal HTTP request detection rules analyzed through statistical analysis and thresholds into MapReduce. Suspected IP addresses are sent challenge values, and IP addresses that provide normal responses are initially allowed while abnormal responses are filtered for a period of time. MapReduce is used to analyze packet data and detect abnormal GET requests based on factors like the IP, port, and URI to identify malicious traffic patterns characteristic of DDoS attacks. The goal is to ensure availability of target systems and reliable detection of HTTP GET flooding attacks in cloud services.
3-JournalofCommunicationsVol.14No.2February2019.pdf
This document presents a case study on the impact of denial of service (DoS) attacks on cloud applications. It begins with an introduction to cloud computing and discusses how DoS and distributed DoS (DDoS) attacks are major security threats. The paper then reviews DoS and DDoS attacks, including their objectives to overwhelm resources or exploit vulnerabilities. Next, it discusses defense strategies against such attacks. Finally, the document describes how the case study will measure the stability of a questionnaire using Cronbach's alpha and determine the impact of related variables on the results using stepwise multiple linear regression analysis and Spearman correlation.
Ix3615551559
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Using the Web or another research tool, search for alternative means.pdf
Using namespace std;
The expansion of a steel bridge as it heated to a final Celsius temperature, Tf, from an initial
temperature T0 , can be approximated using the following formula:
Increase in length= a* L*(Tf-T0). Where a is the coefficient of expansion that is for steel is
11.7e-6, L is the length of bridge at temperature T0.
Using this formula, write a C++ program that displays a table of expansion length for a steel
bridge that’s 7365 meters long at 0 degrees Celsius, as the temperature increases to 40 degrees in
5 degree increments.
Solution
#include
using namespace std;
float Length(int Tf)
{
const float a = 11.7E-6;
const float L = 7365;
const float To=0;
return a*L*(Tf-To);
}
int main(int argc, char const *argv[])
{
cout<<\"Intitial Temperature\\tFinal Temperature\\tIncreased Length\ \";
for (int i=1;i<=8;i++)
cout<<0<<\" degrees\\t\\t\"<.
Distributed Denial Of Service ( Ddos )
This document discusses distributed denial of service (DDoS) attacks. It begins by defining DDoS attacks as using numerous compromised systems, or "zombie machines", to launch a coordinated attack against a target system to overwhelm its bandwidth and resources. The document then discusses how early DDoS attacks worked and how routers have evolved defenses. It describes how modern DDoS attacks are more sophisticated, using botnets of infected systems controlled remotely by attackers to amplify the scale and impact of the attacks.
Protecting your business from ddos attacks
DDoS attacks work by using botnets to overwhelm a target site with large amounts of traffic, making it unavailable to legitimate users. They can have major business impacts by disrupting systems, damaging resources, and costing companies millions per day of downtime. While prevention is challenging due to distributed nature of attacks and internet, companies can mitigate risks by having adequate bandwidth, deploying DDoS defense systems, monitoring traffic, and creating incident response plans.
An Ultimate Guide to DDos Attacks: Detection, Prevention and Mitigation
In this ultimate guide, you will learn everything about the Distributed Denial of Service (DDoS) Attacks including What are DDoS attacks, Types of DDos Attack, Major Causes, How to Detect DDoS Attacks, and How to Prevent/Mitigate a DDoS Attack and much more.
DDoS Protection - Detect & Mitigate DDoS Attacks
Distributed Denial of Service (DDoS) attack occurs when multiple systems are used to overwhelm the available bandwidth or resources of server hardware, application, service, or any other targeted system of an organization.
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Study of flooding based ddos attacks and their effect using deter testbed
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Study of flooding based d do s attacks and their effect using deter testbed
Study of flooding based d do s attacks and their effect using deter testbed
PASSWORD BASED SCHEME AND GROUP TESTING FOR DEFENDING DDOS ATTACKS
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A vivacious approach to detect and prevent d do s attack
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IRJET- EEDE- Extenuating EDOS for DDOS and Eluding HTTP Web based Attacks in ...
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3-JournalofCommunicationsVol.14No.2February2019.pdf
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Ddos attacks
- 1. DDOs Attacks (Distributed Denial of Service Attacks)
- 2. DoS Basics What is Internet? What resources you access through Internet? Who uses those resources? Good vs Bad Users Denial-of-Service attack -DoS attack is a malicious attempt by a single person or a group of people to cause the victim, site, or node to deny service to its customers.
- 3. What is (DoS)Attack - An attack that attempts to stop or prevent a legitimate user from accessing a service or system. The attacker will either directly attack the users network or system or the system or service that the users are attempting to access. -Distributed denial of service attack (DDoS) This type of attack is distributed among many different systems making it more powerful and harder to shutdown
- 4. DDos Feature •Protection from different attacks •Volumetric Attacks: attempt to consume the forwarding capacity either within the target network/service, or between the target network/service and the rest of the Internet •State-Exhaustion Attacks; this attempts to consume the connection state tables which are present in many infrastructure components such as load-balancers, firewalls and the application servers themselves •Application Layer Attacks: targets some aspect of application or service at Layer-7. These are the most deadly kind of attacks as they are very difficult to pro-actively detect and mitigate
- 5. DDOs benefit Extends protection from risks by addressing attacks before they reach your routers and/or firewall Mitigates your exposure to compliance and liability issues Provides 24/7 monitoring so you can use in-house IS/IT resources more effectively Ensures you remain compliant to regulations, such as Payment Card Industry (PCI) standards, by protecting the integrity of your network