DNS 或域名系统就像互联网的电话簿。它翻译域名（例如， www.example.com) 输入计算机用来识别网站的 IP 地址，例如 123.456.78.90。计算机使用这些 IP 地址在互联网上进行定位和相互通信。
DNS 是如何工作的？
当您在浏览器中键入网站名称时，您的计算机会向 DNS 服务器发送请求。DNS 服务器会查找域名并返回相应的 IP 地址，从而允许您的设备连接到该网站。此过程不仅限于网站，还用于电子邮件交付等服务。
DNS 通过处理查找和连接网站的技术细节来简化浏览过程，因此您不必记住长串数字。这是使互联网变得用户友好的重要组成部分。
你的用例是什么？
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用例
Bypassing ISP Restrictions
When ISPs block access to certain domains, switching to a third-party DNS (e.g., Cloudflare 1.1.1.1 or Google DNS) can restore access.
Enhancing Proxy Performance
Proxies often rely on optimized DNS routing to reduce latency. A high-performing DNS resolver ensures your proxy requests are directed to the nearest or most stable server.
Protecting Privacy
Using DNS over HTTPS or a trusted encrypted resolver prevents your ISP from seeing the websites you query, keeping your browsing activity more private.
Large-Scale Web Scraping
When sending millions of requests through proxies, DNS resolution efficiency becomes crucial. Misconfigured DNS can bottleneck scraping tasks or trigger rate-limits.
最佳实践
Use Encrypted DNS
DNS over HTTPS (DoH) or DNS over TLS (DoT) prevents intermediaries from passively monitoring your domain lookups.
Pair DNS with Proxies
Even if DNS is encrypted, the destination IP is still visible. Combining secure DNS with proxies hides both your queries and your request origin.
Choose a Trusted Provider
If you don’t control your own DNS, pick providers with strong privacy policies, like Cloudflare (1.1.1.1) or Quad9. Remember, you’re shifting trust—not removing it.
Monitor for Leaks
In proxy environments, ensure DNS requests aren’t leaking outside your proxy tunnel. A DNS leak test helps confirm your traffic is being routed correctly.
结论
DNS is the hidden layer that keeps the Internet human-friendly, turning names into numbers so your browser can connect. But it’s also a potential weak spot for privacy and performance. By encrypting DNS queries and pairing them with proxies, users can protect their activity and maintain smooth, reliable connections.
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经常问的问题
Does my ISP see the websites I visit if I use their DNS?
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Yes, they can see your DNS queries. With encrypted DNS, they can’t see the raw lookups, but they may still infer activity from IP connections.
If I switch DNS, does that make me anonymous?
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No. It may hide activity from your ISP, but your DNS provider still sees queries. For true anonymity, combine DNS encryption with proxies or VPNs.
What’s the best DNS for privacy?
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Popular choices include Cloudflare (1.1.1.1), Quad9, and NextDNS. Each has different policies—always review their stance on logging.
Can I run my own DNS server?
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Yes, but your server will still need to query upstream servers. This gives you more control but doesn’t fully remove trust issues.
