Over the past decades, the Internet has changed our lives and ways of doing our daily activities. The Internet has changed the methods of communication, and for many enterprises and organizations the technology has changed. In today's business environment, if an organization does not have any presence on the Internet, it risks remaining behind its competitors, as the Internet and technology continues to develop and develop us. This paper provides a small review of the literature on Internet security threats. Typical threats are classified and their effects are shown. Methodical recommendations for their minimization are given.

Keywords: computer security, security threats, spoofing, denial of service, DoS, DDoS, cyber security