El DNS, o Sistema de Nombres de Dominio, es como la agenda telefónica de Internet. Traduce nombres de dominio (p. ej. www.example.com) a las direcciones IP que utilizan las computadoras para identificar sitios web, como 123.456.78.90. Los ordenadores utilizan estas direcciones IP para localizar y comunicarse entre sí en Internet.
¿Cómo funciona el DNS?
Cuando escribes el nombre de un sitio web en tu navegador, tu computadora envía una solicitud a un servidor DNS. El servidor DNS busca el nombre de dominio y devuelve la dirección IP correspondiente, lo que permite que el dispositivo se conecte al sitio web. Este proceso no se limita a los sitios web, sino que también se usa para servicios como la entrega de correo electrónico.
El DNS simplifica la navegación al gestionar los detalles técnicos de la búsqueda y la conexión a sitios web, por lo que no es necesario recordar largas cadenas de números. Es una parte esencial para hacer que Internet sea fácil de usar.
¿Cuál es tu caso de uso?
Chatea con uno de nuestros fanáticos de los datos y desbloquea una prueba gratuita de 2 GB adaptada a tu proyecto.
Use Cases
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.
Best Practices
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.
Conclusion
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.
Ready to power up your data collection?
Sign up now and put our proxy network to work for you.
Frequently Asked Question
Does my ISP see the websites I visit if I use their DNS?
+
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?
+
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?
+
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?
+
Yes, but your server will still need to query upstream servers. This gives you more control but doesn’t fully remove trust issues.
