当您的 DNS 请求发送到您的 VPN 或代理之外时，就会发生 DNS 泄漏，从而将您的浏览活动暴露给互联网服务提供商 (ISP) 或其他方。这会损害您的隐私，并可能泄露敏感信息，即使您使用代理也是如此。
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用例
Protecting Identity Online
When using a proxy for privacy, preventing DNS leaks ensures your ISP or network administrator cannot see which sites you’re visiting.
Web Scraping at Scale
For data extraction tasks, DNS leaks may expose your activity patterns to websites, leading to faster blocks. Configuring leak protection ensures requests are fully masked.
Accessing Geo-Restricted Content
If your DNS queries leak to your local ISP while using a proxy in another country, services like streaming platforms may detect your real location and block access.
最佳实践
Regularly Check for Leaks
Make DNS leak testing part of your proxy maintenance routine to catch problems early.
Combine Proxies with Encrypted DNS
Even if you use high-quality proxies, encrypting DNS lookups adds another layer of protection.
Keep Software Updated
Operating systems, browsers, and proxy clients frequently patch DNS handling bugs. Outdated software increases the risk of leaks.
结论
A DNS leak exposes the websites you visit, even if your proxy is working. By properly configuring DNS settings, using encrypted DNS, and testing regularly, you can ensure your online activity stays private.
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经常问的问题
What causes a DNS leak?
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Misconfigured network settings, operating systems overriding proxy rules, or apps that ignore proxy/VPN configurations often cause DNS leaks.
How do I know if I have a DNS leak?
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Use a tool like dnscheck.tools to see if your DNS requests are going through your ISP instead of your proxy.
Can proxies fully prevent DNS leaks?
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Yes—if properly configured. High-quality proxy providers often build in DNS leak protection, but you should still test regularly.
Is using Google DNS or Cloudflare DNS enough?
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Switching to third-party DNS helps, but it’s not a complete fix. Without leak protection, DNS requests may still bypass your proxy and reveal your activity.
