The Domain Name System translates names into IP addresses, but classic DNS has no built-in way to prove an answer is genuine. That gap enables cache poisoning and spoofing, where an attacker tricks resolvers into sending users to a malicious server.
How DNSSEC helps
DNSSEC (DNS Security Extensions) cryptographically signs DNS records. Resolvers can then verify that an answer really came from the authoritative zone and was not tampered with in transit.
Enabling it
- Most managed DNS providers offer DNSSEC as a one-click toggle.
- After enabling, the provider gives you a DS record to add at your domain registrar — this links the chain of trust.
- Verify with a DNS tool that the chain validates end-to-end.
DNSSEC is especially valuable for domains handling email and authentication, where a spoofed record could redirect sensitive traffic.