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0引言计算机在正常的使用当中,容易受到人为的网络黑客的入侵,非法获取别人的信息用以牟利,这影响了网络的正常运行秩序,对广大网络用户的隐私及信息安全造成了威胁,如何有效的阻止计算机病毒及黑客的入侵是当前计算机网络安全面临的一个重要问题。1计算机网络安全及防火墙技术的含义总体来说计算机网络安全就是在确保网络系统正常运行的同时,确保存储数据的完整、安全、不被篡改及泄露。主要是保护使用者在进行信息传输时,信息不被破坏、窃听及复制。防火墙技术是网络之间一道安全屏障,属于一种隔离技术,是保障计
0 Introduction Computer in normal use, vulnerable to human network hacking, illegal access to other people’s information for profit, which affects the normal operation of the network, the majority of Internet users privacy and information security threats, how Effective prevention of computer virus attacks and hackers is an important issue facing computer network security. 1 computer network security and firewall technology meaning Overall computer network security is to ensure the normal operation of the network system at the same time, to ensure that the integrity of stored data, security, not be tampered with and leaked. Mainly to protect users in the transmission of information, the information is not destroyed, tapping and copying. Firewall technology is a security barrier between networks, is a kind of isolation technology, is the protection of the meter