One interesting spin is known as Slowloris, which instructor Mike Pound describes in a Computerphile video. But attackers are pretty creative, and there are flavors of denial of service that get around that issue. These days, Scott points out, this type of denial-of-service flood attack is less popular, because it’s hard to have one computer with enough bandwidth to take down a website on its own. For a user trying to navigate to a website under a denial-of-service attack, the page would never load - it would hang for a long time, then simply time out. Scott says that, although this type of cyberattack doesn’t steal any information or permanently harm systems, it poses a problem for websites, which are prevented from serving their users due to the attackers crowding out all the legitimate requests. The most important factor in a successful attack was having a faster internet connection than the target, so the target would run out of bandwidth for handling other requests. In the Computerphile video, Scott explains that attackers who had access to faster internet speeds, such as the broadband available to business and university computers, would select a target and send a flood of data at it, leaving the target unable to make additional connections. According to a blog post by SolarWinds, those speeds make watching videos in real time impossible, and even loading a single page on a modern website would take more than a minute on average. Dial-up is slow - it taps out at 56,000 bits per second, less than 1 percent the speed of modern broadband connections. Instructor Tom Scott explains on Computerphile that the malicious core of a DDoS attack is denial of service, a form of attack first seen in the 1990s, when most people with computers browsed the internet using a dial-up connection. | Image: Shutterstock What Does Denial of Service Look Like? There's Just One Problem.ĭenial-of-service attacks prevent legitimate users from accessing a company's site. MORE ON CYBERSECURITY Police Radio Apps Are Surging in Popularity. Instead of launching the attack from a single computer, attackers use many distributed machines - like computers or smart devices in different locations - to overwhelm the target. Companies can take technical precautions, use DDoS protection services and adopt clear business plans in anticipation of an attack.ĭDoS is one of the most popular types of denial-of-service attack. Its annual threat report cautioned that the rise of IoT, which will yield a projected 20 billion connected devices this year, greatly increases the risks of DDoS attacks, which have grown in frequency and intensity.īut as GitHub’s experience demonstrates, it’s possible to have a plan in place that can lessen the damage and even fend off DDoS attacks when they occur. Luckily, the company had a mitigation strategy in place and quickly switched to routing traffic through its DDoS protection service, foiling the attack.Īccording to Netscout, whose subsidiary Arbor Networks created a map that shows daily DDoS attacks, the company detected 23,000 attacks every day in 2019, on average. According to Wired, the attack measured 1.35 terabits of data per second, and GitHub suffered from outages as a result. In 2018, GitHub saw one of the largest DDoS attacks ever recorded.
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