Dishonest competitors and delinquents launch DDoS attacks via the Internet. Distributed DoS attacks create problems for the website by causing a denial of service. As a result, well-meaning visitors of Internet resources are denied access to information and commercial services, or may experience difficulties with the website functionality. DDoS attacks are extremely popular among hackers. They are an inexpensive but effective way to disrupt the work of online services while remaining unpunished.