RPZ(响应策略区)
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响应策略区(RPZ)是一种[[dns|DNS]]防火墙机制,允许网络运营者自定义其[[dns-resolver|DNS解析器]]对特定域名的响应方式。由威胁情报提供商维护的RPZ数据源包含恶意、钓鱼或违反政策的域名列表。当客户端查询RPZ列表中的域名时,解析器返回替代响应(通常为NXDOMAIN或陷阱IP)而非真实DNS答案,在任何网络连接发起前阻断访问。RPZ在递归解析器层面运作,是一种强大而透明的网络层安全控制手段。
示例
An enterprise deploys Cloudflare Gateway with an RPZ feed; when an employee's browser queries a known C2 domain used by ransomware, the resolver returns NXDOMAIN, silently blocking the malware's callback.