Pires, Paulo Sérgio da MottaBatista Júnior, Aguinaldo Bezerra2019-05-092019-05-092009-07BATISTA JÚNIOR, Aguinaldo Bezerra . Firewall de aplicação para redes industriais. 2009. 80f. Dissertação (Mestrado Profissional em Energia Elétrica) - Centro de Tecnologia, Universidade Federal do Rio Grande do Norte, Natal, 2009.https://repositorio.ufrn.br/jspui/handle/123456789/27036The utilization of firewalls is a widely accepted approach when protecting Automation Technology (AT) environments from Information Technology (IT) ones. This dissertation covers the development of a firewall system for TCP/IP-based industrial networks which can protect automation devices from abnormal traffic. Thus, all non-conformity traffic or traffic which does not respect the imposed constraints is considered abnormal and must be blocked. It was developed an user-space application which filters traffic in the application layer. The industrial protocol chosen as a case study was Modbus/TCP, due to its simplicity, abundant documentation and high relevance for current industrial networks.Proteção de infra-estrutura críticaFirewall de aplicaçãoSegurança em redes industriaisFirewall industrialModbus/TCPmasterThesisCNPQ::ENGENHARIAS::ENGENHARIA ELETRICA