Open AccessFirst Line of Defense: Firewall
Author(s) -
Yashraj Singh Tomar,
Nayan Bhile
Publication year - 2021
Publication title -
asian journal of research in computer science
Language(s) - English
Resource type - Journals
ISSN - 2581-8260
DOI - 10.9734/ajrcos/2021/v12i330286
Subject(s) - firewall (physics) , application firewall , computer science , stateful firewall , computer security , intrusion detection system , network security , computer network , context based access control , physics , schwarzschild radius , classical mechanics , network packet , gravitation , charged black hole
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.