In today’s world of globalization and the development of information technology, it is not possible to build a business and production without using the latest advances in science and technology related to information technology. The most promising branches of the direction of information technology are the development and application of cryptographic means of protecting information for various purposes, including the use by government bodies and commercial organizations, the implementation of electronic document management tools, the expansion of the use of encryption schemes based on public keys and means of protecting web resources from DoS attacks. It is necessary to give the following assessment that the problem of countering and repelling Denial of Service attacks is an urgent problem in connection with the widespread introduction of information technologies and the globalization of the Internet, which, in turn, requires effective protection methods corresponding to the adequate cost of providing services. This paper proposes a practical implementation of a technique for detecting one of the most common DDoS attacks at the L7 level of the OSI model - HTTP Flood.