Design and Implementation of a Distributed Firewall

Design and Implementation of a Distributed Firewall

Dalila Boughaci (LRIA-USTHB, Algeria), Brahim Oubeka (LRIA-USTHB, Algeria), Abdelkader Aissioui (LRIA-USTHB, Algeria), Habiba Drias (LRIA-USTHB, Algeria) and Belaïd Benhamou (Technopôle de Château-Gombert, France)
Copyright: © 2009 |Pages: 13
DOI: 10.4018/978-1-59904-855-0.ch013
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Abstract

This chapter presents the design and the implementation of a decentralized firewall. The latter uses autonomous agents to coordinately control the traffic on the network. The proposed framework includes a set of controllers’ agents that ensure the packets filtering services, a proxy agent that plays a role of a proxy server and an identifier agent which is responsible for user authentication. The decentralization of the different agents’ activities is managed by an administrator agent which is a core point for launching the most important operations of the access control. A prototype has been designed and implemented. Furthermore, the authors hope that the underlying framework will inform researchers of a possible way to implement a decentralized firewall to improve the current solution, and will help readers understand the need for techniques and tools such as firewalls that are useful to protect their network traffic.
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Background

This section is intended to give the reader a basic understanding of traditional firewalls and software agents.

Key Terms in this Chapter

Packet: Called also datagrams, it is a piece of a message (data and destination address) transmitted over a packet-switching network.

Computer Security: Techniques and measures used to protect data stored in a computer or circulated on the network from unauthorized accesses. Among the security tools, we find firewalls, intrusion detection system, antivirus, data encryption, and passwords systems.

Packets Filtering: A technique for controlling access to a network by analyzing the traversal packets and allowing or disallowing them passing based on the IP addresses of the source and destination.

Router: A device that forwards data packets along networks.

Ping: A utility to determine whether a specific IP address is accessible.

IP Spoofing: A technique to gain unauthorized access to network. The hacker can do it by modifying the packet header then sending messages to a computer with an IP address indicating that the message is coming from a trusted host.

Network Firewall: A device used to control access between a trusted network and an untrusted network based on certain configured rules.

Hacker: An intruder who gains unauthorized access to computer system.

Proxy: A relay which sits between a client application and the real server permitting to intercept all requests on the network. The proxy server effectively hides the true network addresses.

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