DoT, DoH, and DNSSEC Explained: How Each DNS Security Layer Protects You

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DNS security has gained attention as unprotected DNS queries leave users vulnerable to traffic interception and data manipulation. DNS-over-TLS (DoT) encrypts DNS queries over port 853 using TLS, protecting against eavesdropping but not against a compromised resolver. DNS-over-HTTPS (DoH) wraps DNS requests inside standard HTTPS traffic on port 443, making them indistinguishable from regular web traffic and harder to block or inspect. DNSSEC, by contrast, does not encrypt the channel but cryptographically signs DNS records to verify their authenticity, guarding against cache poisoning and spoofed responses. Security experts recommend combining DoT or DoH with DNSSEC for comprehensive protection — the former securing the transport layer and the latter ensuring the integrity of returned data.

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ProgrammingDEV Community ·

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