This guide outlines key factors for selecting a public DNS resolver, including performance metrics and security features. It emphasizes the importance of choosing resolvers that support DNSSEC and privacy-focused designs to protect user data.
When selecting a DNS resolver, consider important criteria: transport methods, support for DNSSEC, compatibility with IPv6, the jurisdiction of the operator, and the type of provider. Each of these elements can significantly impact performance and privacy.
Performance is assessed using DNS-over-HTTPS (DoH) round-trip time measurements from browsers to resolvers. The fastest resolver can vary based on location due to differing provider speeds and regional factors. Testing environments that run solely over HTTPS provide more secure results.
Encrypted DNS protocols like DoH and DNS-over-TLS (DoT) are shown to decrease the likelihood of query interception, with only minor performance impact. However, the quality of operators can vary, necessitating the use of well-run services to avoid issues such as invalid TLS certificates.
All chosen DNS providers will see the domains queried by users. Therefore, opting for no-logging operators or oblivious designs (e.g., ODoH) is advised for enhanced privacy; both Cloudflare and Apple have implemented such methods.
A validating DNS resolver is essential to prevent spoofed records. Major providers like Google and Cloudflare perform validation. It is crucial to ensure integrity through DNSSEC validation, as demonstrated in studies discussing operator reliability.
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This guide outlines key factors for selecting a public DNS resolver, including performance metrics and security features. It emphasizes the importance of choosing resolvers that support DNSSEC and privacy-focused designs to protect user data.