如何在VPS上搭建加密DNS服务器？

步骤	工具/软件	说明
1. 准备VPS	主流云服务商（如AWS、DigitalOcean）	选择支持Linux系统的VPS
2. 安装DNS服务器	Unbound、dnsmasq	轻量级DNS解析工具
3. 配置加密	DNSSEC、DoT/DoH	实现数据加密传输
4. 防火墙设置	ufw/iptables	开放53端口（DNS）和853端口（DoT）

VPS搭建加密DNS完整指南

准备工作

在开始之前，您需要：

• 一台运行Linux系统的VPS（推荐Ubuntu 20.04+）
• 具有sudo权限的用户账户
• 基本的命令行操作能力

详细操作步骤

1. 更新系统

sudo apt update && sudo apt upgrade -y

2. 安装Unbound DNS服务器

sudo apt install unbound -y

3. 配置Unbound

编辑配置文件：

sudo nano /etc/unbound/unbound.conf

在server:部分添加以下内容： ``` server: interface: 0.0.0.0 access-control: 0.0.0.0/0 allow do-ip4: yes do-ip6: yes do-udp-size: 1232 do-udp: yes do-tcp: yes do-ttl: 300 do-udp-ratelimit: 1000 do-tcp-ratelimit: 1000 do-udp-ratelimit-ratio: 10 do-tcp-ratelimit-ratio: 10 do-udp-ratelimit-burst: 1000 do-tcp-ratelimit-burst: 1000 do-udp-ratelimit-ratio: 10 do-tcp-ratelimit-ratio: 10 do-udp-ratelimit-burst: 1000 do-tcp-ratelimit-burst: 1000 do-udp-ratelimit-ratio: 10 do-tcp-ratelimit-ratio: 10 do-udp-ratelimit-burst: 1000 do-tcp-ratelimit-burst: 1000 do-udp-ratelimit-ratio: 10 do-tcp-ratelimit-ratio: 10 do-udp-ratelimit-burst: 1000 do-tcp-ratelimit-burst: 1000 do-udp-ratelimit-ratio: 10 do-tcp-ratelimit-ratio: 10 do-udp-ratelimit-burst: 1000 do-tcp-ratelimit-burst: 1000 do-udp-ratelimit-ratio: 10 do-tcp-ratelimit-ratio: 10 do-udp-ratelimit-burst: 1000 do-tcp-ratelimit-burst: 1000 do-udp-ratelimit-ratio: 10 do-tcp-ratelimit-ratio: 10 do-udp-ratelimit-burst: 1000 do-tcp-ratelimit-burst: 1000 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