In today's digital landscape, web security starts long before a webpage loads. Every time you visit a website, your device relies on a Domain Name System (DNS) resolver to translate human-readable website names into machine-readable IP addresses. While most internet users rely on their Internet Service Provider's (ISP) default DNS, switching to a secure alternative like Quad9 can dramatically improve your security, privacy, and online protection.
What is Quad9?
Quad9 is a free, global public recursive DNS resolver operated by the Quad9 Foundation, a not-for-profit organization based in Zürich, Switzerland. Launched in 2017 with backing from organizations like IBM and Packet Clearing House, Quad9 was designed to automatically block access to malicious websites, protecting users from malware, phishing, spyware, and botnets.
Key Features of Quad9
- Real-Time Threat Intelligence: Quad9 aggregates threat data from dozens of leading cybersecurity companies worldwide. When a query is made, it checks the domain against these feeds and blocks connections to dangerous sites.
- Strict Privacy Policy: Operating out of Switzerland, Quad9 complies with strict data protection guidelines and does not log or store user IP addresses.
- DNSSEC Validation: It employs cryptographic validation to ensure that DNS responses have not been spoofed or tampered with along the network path.
- Encrypted DNS Support: Quad9 supports modern encryption protocols like DNS over TLS (DoT), DNS over HTTPS (DoH), and DNS over HTTP/3 to prevent eavesdropping.
How to Configure Quad9
You can easily set up Quad9 on your router, computer, or smartphone. For most users, the standard secure configuration (which includes malware blocking) is recommended.
Secure Configuration (Recommended - Blocks Threats)
- Primary IPv4: 9.9.9.9
- Secondary IPv4: 149.112.112.112
- Primary IPv6: 2620:fe::9
- Secondary IPv6: 2620:fe::fe
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