Segurança de redes de computadores: um estudo sobre o firewall Sonicwall

Abstract

The main objective of this study was to identify and describe the functionalities of the SonicWall firewall, emphasizing its application in corporate network security. To achieve this goal, a bibliographic research was conducted based on standards and previous studies, alongside the practical implementation of a physical SonicWall TZ570 firewall. This process made it possible to understand how advanced resources such as Content Filtering Service (CFS), App Control, NAT and Geo-IP Filtering can be applied to mitigate cyber risks and protect data against unauthorized access, malware and distributed attacks (VIEIRA, 2021). During the development of the study, practical configurations were carried out on the SonicWall, starting from the definition of a fixed IP address for administrative access to the application of security policies such as content filtering and application control. Tests were then performed to validate these configurations, including attempts to access blocked websites, the use of restricted applications and simulations of external attacks. The results confirmed the effectiveness of the firewall in enforcing the defined security policies, ensuring granular control over traffic and increasing network protection. The study concluded that next-generation firewalls such as SonicWall play a fundamental role in information security, offering not only packet inspection but also integrated filtering and threat prevention functionalities. It was also verified that the application of standards such as ISO/IEC 27000 is essential to establish consistent security guidelines. However, a limitation of this study was the absence of tests in high-demand or distributed network environments, which could further evaluate the device’s performance in complex scenarios. Nevertheless, the importance of using robust and properly configured tools to protect corporate networks is reinforced.