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Research Article Open access CC BY 4.0

First Line of Defense: Firewall

Yashraj Singh Tomar, Nayan Bhile

Asian Journal of Research in Computer Science · pp. 25–32 · Published 15 Nov 2021

10.9734/ajrcos/2021/v12i330286

Abstract

Firewalls are a fundamental element of network security systems with the ability to block network data traffic flows according to predefined rules. They work on the main purpose to prevent the spread of any deleterious event both on the host as well as network side from any intrusion. Conventional firewalls rely on functions specified by a sequence of rules, which often conflict. Also, various forms of tunnels, wireless and dial-up access methods allow individuals to bypass all the security mechanisms provided by the traditional firewall. Thus, in this paper we discuss the uses and classification of both host and network-based firewalls, other firewall approaches to overcome the cons of traditional firewalls, various firewall policies, including some anomalies.

Packets demilitarized zone (DMZ) ports TCP/UDP OSI Model IPSEC cryptography firewall decision diagram (FDD).

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Cited by 5

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Fadhillah Maulana, Hilal Huda, Ashik Alam · 2025 IEEE 9th International Conference on Software Engineering & Computer Systems (ICSECS) · 2025

Conventional and next generation firewalls in network security and its applications

Anaa Makhdoomi, Naila Jan, Palak · 2022 International Conference on Computing, Communication, and Intelligent Systems (ICCCIS) · 2022

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