Abstract: Network security has become a critical global issue for organizations due to the increasing cyber-attack rate. To enhance organizations' network security, this paper focuses on categorizing the security threat model, which enables examining the impact of threat classes rather than individual impacts. This paper reviews various threat categorization models and proposes criteria for classifying information system security hazards in cloud computing. It also investigates network security vulnerabilities and classifies security concerns using the CIA (confidentiality, integrity, and availability) triangle. Moreover, this paper explains fundamental concepts and procedures for carrying out various network security operations in cloud computing using both paid and open-source tools. This research aims to educate and enable organizations to reduce security threats while having full visibility and control of their infrastructure both in the cloud and on-premises.

Keywords: Network, on-premises, security, cyber-attacks, cloud computing.

| DOI: 10.17148/IARJSET.2023.10321