What Is A Distributed Denial-of-Service (DDoS) Attack?

By Staff Reporter , Updated Sep 17, 2020 11:22 AM EDT
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What Is A Distributed Denial-of-Service (DDoS) Attack?
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A distributed denial of service attack is a spiteful attempt to interrupt the regular traffic of an embattled server, network, or service by devastating the target or its adjacent infrastructure with an overflow of Internet traffic flow.

DDoS attacks realize effectiveness by using multiple compromised computer systems as foundations of attacking traffic. Exploited apparatus can include computers and other networked gadgets such as IoT devices. For instance, smartphones, smart speakers, smart TVs, smart refrigerators, and plenty more besides.

To keep your devices from the frustration and hassle of DDOS attacks, you will find it necessary to install a reputable antivirus program like Bitdefender. Once an attack is noticed, the IDS blocks traffic from the unlikely source.

This approach is meek enough, and it is often effective at shutting down virtual attacks. However, online crooks have upped their game. Nowadays, the goal of these attacks is to extort money, shut down enterprise applications, or claim bragging rights. This review will look at how DDoS attack works, the types of DDoS attacks, and how to identify a DDoS attack.

How A DDoS Attack Works

DDoS attacks are carried out with networks of Internet-connected apparatus. These networks comprise of computers and other gadgets such as IoT devices, which have been infested with malware, permitting them to be controlled remotely by a hacker.

These specific devices are referred to as bots, and a cluster of bots is referred to as a botnet. Once the botnet has been established, the hacker is able to direct an attack by signaling remote directives to each bot.

When the botnet embattles a victim's server or network, each bot sends appeals to the target's IP address. This potentially causes the server to become overwhelmed, resulting in a (denial of service) to standard traffic. Because each bot is a genuine Internet device, differentiating the attack traffic from regular traffic can be challenging.

How to Identify A DDoS Attack?

The most apparent indication of a DDoS attack is a website suddenly becoming sluggish or inaccessible. But for some reason, such an authentic rise in traffic can cause similar performance problems, further inquiry is required.

Traffic analytics apparatus can help you identify some of these tell-tale signs of a DDoS attack, and they include the following:

A mysterious surge in requests to a single page or endpoint.

-A flood of traffic from users who share a single behavioural profile, such as device type, geolocation, or web browser version.

-Odd traffic patterns such as spikes at odd hours of the day or patterns that appear to be unnatural for instance, a spike every 10 minutes.

-Suspicious amounts of traffic originating from a single IP address or IP range.

Types of DDoS Attacks

Volume-Based Attacks

A volume-based attack includes a vast number of requests channeled to the target system. The system contemplates these requests as invalid requests (malformed packets) or valid (spoofed packets). Hackers carry out volume attacks with the aim of devastating the network volume.

These requests could be across an assortment of ports on your system. One of the means hackers use is UDP amplification attacks. Using these attacks, they send a request for data to a third-party server and consequently, they spoof your server's IP address as the return address. The third-party server then sends massive amounts of data to the server in response.

Application Based Attacks

In this type of attack, hackers use weaknesses in the application server software or network server software that causes the webserver to crash or hang. Here the protocol is correct, so the traffic looks legitimate, which makes it hard for the IDS to detect.

A common kind of application-based attack includes sending partial requests to a server to make the whole database connection pool of the server busy so that it blocks the authentic requests.

Protocol-Based Attacks

These attacks are targeted on servers which exploit the systems used for communicating with each other. Flooding can bring down a service, but so can manipulating bugs in the procedures for the network and transport layers.

Even when a network receives only small amounts of traffic, protocol attacks can disrupt business. Packets may be intended to make servers wait for a non-existent reply during a typical handshake protocol like an SYN flood.

Conclusion

To sum it all up, DDoS attacks can be a nightmare for individuals and businesses alike, as we have seen above. This, therefore, means having a good antivirus and firewalls as well is of paramount importance.

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