第7 章 防火墙（The seventh chapter firewall）.doc

第7 章 防火墙（The seventh chapter firewall） In this paper, Yi dust 20 contributions Ppt documents may experience poor browsing on the WAP side. It is recommended that you first select TXT, or download the source file to the local view. The seventh chapter firewall Http:///webnew/ Seventh chapters 7.1, 7.2, 7.3, 7.4 firewall Firewall outlines the firewall classification, firewall architecture, firewall applications Http:///webnew/ 7.1 firewall overview The basic concept of 7.1.1 firewall firewall is a software and hardware equipment assembly, firewall is a software and hardware equipment assembly, in the internal network and external network between the internal network and external network, and between private network and public network interface between the structure of the protective barrier. Is a safety method to construct the image of said protective barrier is a kind of method to obtain security image that it is a combination of computer hardware and software, which is a combination of computer hardware and software, so as to establish a security gateway and establish a security gateway between Internet and Intranet), to protect the internal network from non (Security Gateway), to protect the internal network from non intrusive method), users, mainly by the firewall service access. The firewall is mainly composed of 4 parts, service access rule, verification tool, packet filter and application gateway. Tools, packet filtering, and application gateways. Http:///webnew/ Some basic terms about firewalls 1) screened subnet (screened subnet)) shielded subnet 2) host host) (host) 3) bastion host bastion host (bastion host)) 4) dual homed host) dual homed host (dwal homed host) 5) packet filtering) data packet filtering (package filtering) 6) screening router) screening router (screened router) 7) (screened) shield shield host host firewall firewall host) 8)) (firewall) Http:///webnew/ Some basic terms about firewalls 9) proxy server (proxy) server) 10) IP address spoofing