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tech 5 September 2026

Quad9: An Open DNS Service for Enhanced Security and High Privacy

Quad9 offers a free DNS service that shields against online threats while maintaining user privacy. Learn how this service enhances Internet security while respecting privacy.

Article inspired by the original source
An open DNS recursive service for free security and high privacy ↗ quad9.net

Introduction

In a world where online threats are multiplying and data privacy is increasingly concerning, Quad9 stands out as a public and free DNS service that promises to enhance security while respecting privacy. But how does it work exactly, and why should you consider using it?

What is Quad9?

Quad9 is a recursive DNS service that replaces your default Internet Service Provider (ISP) or enterprise DNS configuration. By intercepting DNS queries, Quad9 blocks access to malicious sites through a real-time updated threat list. This service, operated by the Swiss foundation Quad9, is already established in over 110 countries with more than 230 resolver clusters, handling an average of 670 million blocks per day.

How Does Quad9 Protect Your Security?

Every Internet transaction starts with a DNS event. By using Quad9, users benefit from protection against malware, phishing, spyware, and botnets. For instance, if your device attempts to access a site included in Quad9's threat list, the service blocks the request before the site even loads.

Key Figures

  • 670M+: Average daily blocks conducted by Quad9.
  • 230+: Number of resolver clusters worldwide.
  • 25+: Number of threat intelligence providers collaborating with Quad9.

Quad9 and Data Privacy

Unlike other DNS resolvers, Quad9 makes privacy a priority. No logs containing your IP address are retained. Additionally, the platform has been GDPR-compliant since its launch in 2017, ensuring that user data is never commercialized.

Why Is This Important?

The nature of DNS queries reveals very sensitive data about users. Quad9 is committed not to succumb to the temptation of commercializing these data, a commitment that distinctly stands out in a sector where privacy is often compromised.

Implementation and Adoption

Quad9 is easy to set up on most devices, offering clear setup guides for various operating systems. For businesses, adopting Quad9 can mean a reduction in security-related incidents while meeting regulatory requirements.

Conclusion

Quad9 represents an effective solution for anyone wishing to enhance their online security without compromising their privacy. With robust infrastructure and a commitment to data privacy, Quad9 establishes itself as a major player in the DNS resolver field.

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DNS Sécurité Confidentialité Quad9 Internet
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