论文部分内容阅读
0引言构建防火墙最常用于防范网络攻击的手段和先决条件。但在网络技术飞速发展的现代,仅用目前的防火墙技术是远远不够的,这是因为:大多数防火墙产品对应用层的保护能力不够,没有实现真正的内容过滤。因此,只应用防火墙软件就足够安全的想法是不现实的。1网络安全概述1.1网络安全的定义按照国际化标准组织(ISO)对计算机安全系统的要求是:为处理数据系统的建立和采用的技术以及管理的安全提供保护,
0 Introduction The most commonly used methods and preconditions for building firewalls are to guard against network attacks. However, with the rapid development of network technology, the current firewall technology is not enough. This is because most firewall products do not have enough application layer protection capabilities and do not implement true content filtering. Therefore, the idea of using only firewall software is safe enough is not realistic. 1 Network Security Overview 1.1 Definition of Network Security According to the International Organization for Standardization (ISO) on the computer security system requirements are: to deal with the establishment of the data system and the adoption of technology and management of security to provide protection,