期刊名称：International Journal of Computer Science and Information Technologies
电子版ISSN：0975-9646
出版年度：2015
卷号：6
期号：5
页码：4571-4574
出版社：TechScience Publications
摘要：Firewalls are one of the most commonly used security systems to protect networks and hosts. Most researchers have focused on analyzing the latency and throughput of router firewalls. Different from this approach, this research focuses on studying the performance impact and the sensitivity of the Linux firewall (iptables) for a single host. The performance and the sensitivity of the firewall is measure by designing and instrumenting each layer of the Linux TCP/IP stack. As firewall designed in Linux (OSS), user or requesting person can change the source code of firewall as per our security requirement at any time It is a device or set of device configure to permit , deny, encrypt , decrypt or proxy all ( in or out) computer traffic between different security domains based upon a set of rules and other criteria. Firewall can be implemented in either hardware or software, or a combination of both. Firewalls are frequently used to prevent unauthorized internet users from accessing private a network connected to the internet especially intranet. All message entering or leaving the intranet pass through the firewall which examines each message and blocks those that do not meet those that do not meet the specified security criteria.
