O que é um vazamento de DNS? (Proxies explicados)
Um vazamento de DNS ocorre quando suas solicitações de DNS são enviadas para fora da sua VPN ou proxy, expondo sua atividade de navegação ao seu provedor de serviços de Internet (ISP) ou a terceiros. Isso compromete sua privacidade e pode revelar informações confidenciais, mesmo se você estiver usando um proxy.
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Casos de uso
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.
Melhores práticas
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 Outdated software increases the risk of leaks.
Conclusão
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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Pergunta mais frequente
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.
