0day安全:软件漏洞分析技术
0day安全:软件漏洞分析技术
第 1 章 防火墙的基本概念 ····················································································· 1 1.1 TCP/IP的基本概念 ························································································································ 2 1.1.1 应用层 ···································································································································· 2 1.1.2 传输层 ···································································································································· 3 1.1.3 网络层 ···································································································································· 4 1.1.4 链路层 ···································································································································· 4 1.2 数据包传输 ····································································································································· 4 1.3 TCP、UDP及Socket的关系 ········································································································ 9 1.4 何谓防火墙 ··································································································································· 12 1.5 防火墙的判断依据 ······················································································································ 14 1.5.1 各层数据包包头内的信息 ·································································································· 14 1.5.2 数据包所承载的数据内容 ·································································································· 16 1.5.3 连接状态 ······························································································································ 16 1.6 防火墙的分类 ······························································································································· 17 1.6.1 数据包过滤防火墙 ·············································································································· 17 1.6.2 应用层防火墙 ······················································································································ 18 1.7 常见的防火墙结构 ······················································································································ 19 1.7.1 单机防火墙 ·························································································································· 19 1.7.2 网关式防火墙 ······················································································································ 20 1.7.3 透明防火墙 ·········
引言.................................................................................................................................................................... 3 一、HTTP 协议详解之URL 篇........................................................................................................................... 3 二、HTTP 协议详解之请求篇........................................................................................................................... 3 三、HTTP 协议详解之响应篇........................................................................................................................... 4 四、HTTP 协议详解之消息报头篇................................................................................................................... 5 1、普通报头.............................................................................................................................................. 5 2、请求报头.............................................................................................................................................. 6 3、响应报头.............................................................................................................................................. 7 4、实体报头.............................................................................................................................................. 7 五、利用telnet 观察http 协议的通讯过程.................................................................................................8 1、打开telnet......................................................................................................................................... 8 2、连接服务器并发送请求...................................................................................................................... 9 3、实验结果:.......................................................................................................................................... 9 4、注意事项............................................................................................................................................ 10 六、HTTP 协议相关技术补充.........................................................................................................................