Network Perimeter Defenses Using Open-Source Software. Iraqi Journal of Information and Communication Technology, [S. l.], v. 1, n. 2, p. 41–51, 2018. DOI: 10.31987/ijict.1.2.22. Disponível em: https://www.ijict.edu.iq/index.php/ijict/article/view/22. Acesso em: 9 apr. 2026.