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Quad9 is a free public DNS service designed to enhance security and privacy for Internet users. By replacing your default ISP or enterprise DNS configuration, Quad9 blocks malicious hostnames from a real-time threat list, protecting devices against malware, phishing, spyware, and botnets. Quad9 is operated by the Quad9 Foundation, a non-profit organization based in Switzerland, with a mission to provide a safer and more robust Internet. The service has been designed to be GDPR-compliant since its inception.

Key Features and Benefits

Quad9 offers several key features that make it an attractive choice for users concerned about security and privacy:

• Real-time Threat Blocking: Quad9 uses threat intelligence from over 25 cybersecurity companies to block known malicious sites.
• Enhanced Privacy: Quad9 does not log IP addresses, ensuring user privacy. Connections can employ encryption where supported.
• Global Coverage: With over 230 resolver clusters in more than 110 countries, Quad9 provides widespread coverage.
• Easy to Use: Users can configure their devices or routers to use Quad9 by setting specific DNS server addresses, with no sign-up or account required.

How It Works

Quad9 works by routing DNS queries through a secure global network of servers. It checks the requested domain against a list of known threats and blocks access if a match is found. This process happens in real-time, ensuring protection against the latest threats.

Setting Up Quad9

To start using Quad9, users simply need to change their DNS server settings to the addresses provided by Quad9. Detailed instructions are available for both Windows and macOS systems.

Conclusion

Quad9 offers a robust solution for individuals and organizations seeking to enhance their online security and privacy. With its real-time threat blocking, commitment to privacy, and global coverage, Quad9 is a valuable tool in the fight against cyber threats.