Introduction to Denial-of-Service (DoS) attack

Introduction to Denial-of-Service (DoS) attack

Introduction to Denial-of-Service (DoS) attack

A denial-of-service (DoS) attack includes flooding a network resource or application with traffic from several sources in order to make it inaccessible to its intended users. 

This can be achieved using a variety of tactics, such as flooding a targeted server with network packets, exploiting security flaws in network equipment, or initiating the attack using a network of infected devices (a "botnet").

A DoS attack aims to interfere with a network's normal operation, prohibit users from accessing it, and maybe cause financial or reputational harm to an organization. 

DoS attacks can have a significant impact on businesses, organizations, and individuals, therefore it's critical to have the proper security measures in place to prevent and mitigate them.

DoS attacks usually use one of two techniques: overburdening or crashing systems. Flood breakouts occur when the system receives too much traffic for the server to buffer, leading it to slow down and eventually shut down.

Buffer Overflow Attacks

The most common DoS attack is a buffer overflow. The goal is to send more traffic to a network address than the system was intended to manage. It includes the attacks outlined below, as well as others designed to exploit flaws unique to individual programs or networks.

CMP Flood

The ICMP flood exploits incorrectly configured network devices by sending bogus packets that ping all of the target network's computers rather than just one appliance. The newly formed network then amplifies the traffic. This attack is also known as the "ping of death" or the "smurf assault."

SYN Flood

SYN flood attempts to connect to a server but fails every time. It continues until all open ports are overwhelmed with requests and none remain open for legitimate people to connect to.

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