What it does
Quad9 is a free public DNS service that blocks lookups for domains appearing in its threat sources.
Quad9 is a resolver choice for a device or network, rather than an installed antivirus. Its page describes blocking malicious hostnames when a device asks for their addresses. The setup guidance is therefore the useful place to begin. Choose the appropriate encrypted-DNS configuration for supported devices and keep the distinction between DNS and application traffic clear. Quad9's privacy statements describe its own resolver practices; they do not establish anonymity for the websites and applications used afterward.
Strengths
- Free public resolver with threat-domain filtering
Best for
- People selecting a protective public DNS resolver