What is a DDoS attack (Distributed Deny of Service Attack)?
DDoS AttackDDoS is short for distributed denial of service (DDoS). DDoS attacks are when multiple compromised computers attack a website, server, or another network resource through a flood of connection requests, or malformed packets.
DDoS attacks result in a denial-of-service attack on users of the targeted target systems, which causes those systems to crash or slow down, thus denying legitimate users or systems access to their services.
What is a DDoS attack?
Cybercriminals carry out DDoS attacks by gaining unauthorized control of a network of computers. Cybercriminals can turn these computers and other systems, such as IoT devices, into bots (or zombies) using specially-designed malware. A botnet is a group of these bot systems. To carry out DDoS attacks, cybercriminals can remotely control the botnet.
Cybercriminals can direct the devices in the botnet by sending instructions to each bot via a method of remote control. Each bot that targets an IP address (website, server, or another network resource) will send repeated requests to the target. This could cause the target machine to overload its capacity and result in a denial of service to normal traffic.
Botnets come in any size. They can contain tens of thousands or hundreds of millions of compromised devices. There is no upper limit to the size of botnets. Once a botnet has been created, attackers can use the traffic generated from those compromised devices to attack the targeted site or computer with overwhelming connections requests.
Different types of DDoS Attack
Here are some common DDoS attacks on web servers and web apps:
HTTP Flood is one type of DDoS attack these appear to be legitimate GET and POST requests but are being exploited by a cybercriminal. Although this attack is less bandwidth-intensive than other DDoS attacks it can force the target machine (the server) to use maximum resources.
UDP flood attacks target random ports in a computer network or system that uses UDP packets. This involves sending large volumes of UDP packets directly to the target machine.
The SYN Flood attack exploits weaknesses in the TCP connection sequence in a server, also known as a three-way handshake. An attacker sends multiple SYN requests (TCP connections) to the target machine (server).
Typically, the server responds with an SYN-ACK reply, followed by the client system with an ACK signal to establish the link. The ACK is not sent in an SYN flood. This causes the server (target machine), to slow down or crash, resulting in an accumulation of broken connections.
The Ping of Death
Ping of Death is another type of DDoS attack which manipulates IP protocols by sending malicious pings to the target system. This attack depends on the response of target machines. This can cause the server to crash or slow down, and it can also significantly increase bandwidth usage.
Smurf Attack, another type of DDoS attack, uses a particular malware called smurf to exploit Internet Protocol and Internet Control Message Protocol. This attack causes the targeted machine to become unresponsive by flooding it with spoofed messages.
Application Level Attacks
Application Level Attacks exploit security flaws in applications (targeted systems’ applications). This type of DDoS attack does not aim to take down the entire server. Instead, it targets applications that have known vulnerabilities.
Advanced Persistent DoS
Advanced Persistent DoS is another type. It is designed to cause serious damage to the targeted computers. To attack the targeted devices, it uses various attacks, including HTTP flooding and SYN flooding. DDoS attacks of this nature can last from days to weeks due to the attacker’s ability to change tactics at any time and create modifications to avoid security defenses.
Zero-Day DDoS Attacks
Another type of DDoS attack that is similar to zero-day cyber attacks is the zero-day DDoS attack. These attacks exploit zero-day vulnerabilities in targeted systems (for which there is no patch).
DDoS Attacks: Prevention, Detection, and Mitigation
It doesn’t matter what type of business you run, maintaining a website or business application is crucial to your brand’s reputation. Cybercriminals are looking for this weakness.DDoS attacks. DDoS attacks are unpredictable and it is difficult to take preventive measures. This makes attackers more likely to act.
How can you defend your web applications and websites from cyber-attacks and stop DDoS attacks on them? A DDoS attack usually starts with one compromised machine. However, rather than expose itself directly, it will find other vulnerable servers and systems around the globe and secretly install malware on them.
You can prevent certain types of DDoS attacks by blocking ports that are not being used, updating the software, and using modern networking hardware. Other types of DDoS attacks can be avoided by taking precautionary measures. You can use malware detection software like the Comodo cWatch or Malicious Activity Detection Software to detect DDoS attacks and stop them from causing much damage to your company.
Comodo cWatch is one of the leading website security software that is available in the market today. cWatch can detect and remove DDoS attacks and improve the speed of your website. Comodo cWatch is a cloud-based malware scanner and a ‘Default Deny” approach that will exceed your expectations.
Your website, and your brand, may have taken so much time and effort. You need to be careful about web security. Get cWatch today!