Posted by In today’s connected world, the availability and reliability of online services are critical for both individuals and businesses. However, these services are constantly under threat from cyber attackers who seek to disrupt and disable them through a variety of means. One of the most common methods used to achieve this is a denial of service (DoS) attack.
A DoS attack is an attack that aims to make a website, application, or network resource unavailable to its intended users by consuming its resources or flooding its network with traffic. In this article, we’ll examine the different types of DoS attacks and how they work.
- Distributed Denial of Service (DDoS) Attack
A Distributed Denial of Service (DDoS) attack is a type of DoS attack in which an attacker uses multiple machines to send traffic to the target, overwhelming the target and making it unavailable. By using multiple sources, the attacker is able to generate a larger volume of traffic than they could with a single machine, making it more difficult to defend against the attack.
- Ping of Death Attack
A Ping of Death attack is a type of DoS attack in which an attacker sends a series of large Internet Control Message Protocol (ICMP) packets to the target, which are larger than the maximum size allowed by the Internet Protocol (IP). When the target receives these packets, it attempts to store them in memory buffers, but the buffers are too small to accommodate the large packets, leading to a buffer overflow.
- SYN Flood Attack
A SYN Flood attack is a type of DoS attack in which an attacker sends a large number of Synchronize (SYN) packets to the target machine, each of which requests the initiation of a new network connection. The target machine responds with a SYN-ACK packet for each incoming SYN packet, but the attacker never sends the final ACK packet to complete the connection, effectively leaving the target machine waiting for a response that will never come. This creates a large number of half-open connections, which consume resources on the target machine, causing it to become unavailable to legitimate users.
In conclusion, DoS attacks are a serious threat to the availability and reliability of online services. Understanding the different types of DoS attacks and how they work is critical for businesses and individuals who rely on online services. By being aware of these threats, you can take steps to protect yourself and your online assets from the damaging effects of a DoS attack.
When a denial of service (DoS) attack occurs, the availability aspect of security has failed. A DoS attack is a type of cyber attack in which an attacker inundates a target with a large amount of traffic, causing the target to become overwhelmed and unavailable to users. The goal of a DoS attack is to make a website, application, or network resource unavailable to its intended users by consuming its resources or flooding its network with traffic.
Distributed Denial of Service (DDoS) attack.
In a DDoS attack, the attacker uses multiple machines (often compromised through malware) to send traffic to the target, overwhelming the target and making it unavailable. By using multiple sources, the attacker is able to generate a larger volume of traffic than they could with a single machine, making it more difficult to defend against the attack.
DDoS attacks are a serious threat to the availability and reliability of online services, and they are becoming increasingly common as attackers continue to find new ways to exploit vulnerabilities in networked systems.
The type of denial-of-service (DoS) attack that uses large Internet Control Message Protocol (ICMP) packets to cause an overflow of the memory buffers allocated for packets is known as a Ping of Death attack.
In a Ping of Death attack, the attacker sends a series of large ICMP packets to the target, which are larger than the maximum size allowed by the Internet Protocol (IP). When the target receives these packets, it attempts to store them in memory buffers, but the buffers are too small to accommodate the large packets. This leads to a buffer overflow, which can cause the target’s system to crash, freeze, or reboot.
Ping of Death attacks was more common in the early days of the Internet when security was not a major concern and systems were not designed to handle large packets. However, modern systems and network devices are generally better equipped to deal with such attacks and are less susceptible to them.
The type of denial-of-service (DoS) attack that involves sending Synchronize (SYN) packets to a target machine but never responding to any of the SYN-ACK replies is known as a SYN Flood attack.
In a SYN Flood attack, the attacker sends a large number of SYN packets to the target machine, each of which requests the initiation of a new network connection. The target machine responds with a SYN-ACK packet for each incoming SYN packet, but the attacker never sends the final ACK packet to complete the connection, effectively leaving the target machine waiting for a response that will never come. This creates a large number of half-open connections, which consume resources on the target machine, causing it to become unavailable to legitimate users.
SYN Flood attacks are a type of network-level DoS attack that targets the Transmission Control Protocol (TCP) protocol, which is the main protocol used for establishing network connections on the Internet. They can be difficult to defend against, as they often involve large numbers of spoofed IP addresses, making it difficult to trace the source of the attack.
Spyboy blog 