Denial-of-service (DoS) and distributed denial-of-service (DDoS) attacks are malicious attempts at disrupting the normal operation of a targeted server, service, or network by flooding it with Internet traffic.
DoS attacks are caused by malicious traffic being sent from one machine, usually a computer. They can be quite simple. A basic ping flooding attack is achieved by sending more ICP (ping) requests than the targeted server can process and respond to.
DDoS attacks use multiple machines to send malicious traffic to their target. These machines often form part of a Botnet, which is a group of infected computers or devices. An attacker can then remotely control them. Other times, a DDoS attacking tutorial can be launched by multiple attackers working together to send traffic using their own computers.
DDoS attacks have become more common and are more damaging to the internet for two reasons. Modern security tools can stop DoS attacks of any kind. DDoS attacks tools are now relatively inexpensive and simple to use.
What are the different types of DoS/DDoS attack tools?
There are many tools that can be used to launch DoS/DDoS attack. DDoS attack tools are commonly called “stressors”. They have the stated purpose to help network engineers and security researchers perform stress testing against their networks. However, they can also be used for genuine attacks.
Some tools are specific and focus only on one layer of the OSI Model, while some others allow for multiple attack vectors. There are several types of attack tools:
Low- and slow-attack tools
These types of attack tools, as the name suggests, use a low data volume and operate very slowly. These tools are designed to transmit small amounts of data over multiple connections to keep ports open on the targeted server as long as possible. They then take up server resources until they can no longer maintain additional connections. Low and slow attacks can sometimes be very effective, even if they are not part of a distributed system like a botnet. They are often used by one machine.
Application layer (L7) attack tools
These tools target Layer 7 of the OSI Model where Internet-based requests like HTTP take place. An HTTP flood attack is used to overwhelm a target by sending HTTP GET or POST requests. This makes it difficult for malicious actors to distinguish normal visitors’ requests from attack traffic.
Attack tools for protocol and transport layer (L3/L4)
These tools use protocols like UDP in order to send large amounts of traffic to targeted servers, such as during a UDP flooding. These attacks can be ineffective on their own, but they are often used in conjunction with DDoS attacks.
What are the most common DoS/DDoS attack tools?
Some of the most commonly used tools are:
Low Orbit Ion Cannon
The LOIC stress testing tool is open-source. It allows for both HTTPCP as well as UDP protocol layer attacks. The interface is user-friendly and WYSIWYG. Due to the success of the original tool, derivatives were created that allow attacks can be launched via a web browser.
High Orbit Ion Cannon
This attack tool was designed to replace the LOIC. It expands its capabilities and adds customizations. The HOIC can launch targeted attacks that are hard to counter using the HTTP protocol. DDoS Software is intended to allow at least 50 people to work together in an organized attack effort.
Slowloris can be used to attack a server with a slow and low attack. To create a harmful effect, it requires a small number of resources.
R.R.U.D.Y. – Another low and slow attack tool, was created to allow allows users to launch attacks with a simple point and click interface. DDoS attack online attempts to slow down the target server by opening multiple HTTP requests and keeping them open for as long as possible.
What can I do to defend myself against DoS/DDoS?
There are many forms of DDoS programs and DoS attacks, so it is important to have a variety of tactics for mitigating them. The following are common tactics to stop DDoS attacks:
Rate Limiting: A restriction on the number of requests that a server accepts in a given time frame
Web application firewalls: These DDoS tools filter web traffic using a set of rules
Anycast network diffusion: A large distributed cloud network that connects a server to incoming traffic. This allows for additional computing resources to be used to respond to requests.