Application layer firewalls protect the trusted area network against information security risks. However, firewall performance may affect user experience. Therefore, performance analysis plays a significant role in the evaluation of application layer firewalls. This paper presents an analytic model of the application layer firewall, based on a system analysis to evaluate the capability of the f...

From a security point of view, the Internet is too open. The central idea of a traditional “firewall” is to constrain service requests from the Internet to a local network. As an enterprise network becomes larger and more flexible, an Internet worm can easily find a way to enter it. Based on the “defense-in-depth” principle, we present a “Firewall Network System” for worm defense in an enterpri...

We present a formal model of network protocols and their application to modeling firewall policies. The formalization is based on the Unified Policy Framework (UPF). The formalization was originally developed with for generating test cases for testing the security configuration actual firewall and router (middle-boxes) using HOL-TestGen. Our work focuses on modeling application level protocols ...

Nowadays there are many DNS firewall solutions to prevent users accessing malicious domains. These can provide real-time protection and block illegitimate communications, contributing the cybersecurity posture of organizations. Most these based on known domain lists that being constantly updated. However, in this way, it is only possible communications for domains, leaving out others but have n...

Firewall is a useful technique that ensures network security. Firewall examines network packets and determines whether to accept or deny them based on an ordered set of filters. If anomalies, such as no packets reach to a server in a local network, which is protected by an individual firewall or by the most downstream firewall of hierarchical structure firewalls, exist in local network, an admi...

    The article attempts to have neural network and genetic algorithm techniques present a model for classification on dataset. The goal is design model can the subject acted a firewall in network and this model with compound optimized algorithms create reliability and accuracy and reduce error rate couse of this is article use feedback neural network and compared to previous methods increase a...

We propose to use tissue-like P systems as a tool to model and analyse the security properties of firewall systems. The idea comes from a clear analogy between firewall rules and P systems rules: they both modify and or move objects (data packets, or symbols of an alphabet) among the regions of the system. The use of P systems for modeling packet filters, routers and firewalls gives the possibi...