DNSCrypt安全防护技术详解

什么是DNS？
DNS（Domain Name System）是网络安全中的核心协议，用于将网络资源分配到域名中，DNS记录每个域名对应的IP地址，方便网络管理员快速访问访问控制点，DNS攻击的威胁日益严峻，尤其是DNS攻击中的DNS Crypt攻击,已经逐渐成为网络安全领域的重点。

DNS Crypt的作用
DNS Crypt是一种专门针对DNS攻击的网络安全防护技术，用于防止DNS攻击中的外挂攻击（Outsider挂出）和恶意服务器攻击（Malicious server attack），通过加密技术，DNS Crypt将DNS请求的数据加密，使得外挂攻击者难以轻易获取目标服务器的IP地址和服务器密钥,从而有效降低了DNS攻击的风险。

DNS Crypt的安装步骤

1. 获取安装包
   下载并安装DNS Crypt的安装包，通常为Windows或Mac版本，安装过程中，默认会生成配置文件，如DNS Crypt.x86_64.cca（Windows）或DNS Crypt.app.macosx.cca（Mac）。

2. 解压安装包
   解压安装包后，运行配置脚本，通常名为DNS.csh，该脚本会生成新的配置文件，如DNS.CMP.DNS.DNS.SECURE.DNS.TLS.DNS.YAPY.DNS.CRT.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS.DNS