What happens if DNSSEC is misconfigured?

DNSSEC misconfiguration consequences:

Common misconfigurations:

Expired signatures (not renewed)

Key mismatch (DS record does not match DNSKEY)

Missing DS record at registrar

Algorithm mismatch

Result:

Validating resolvers return SERVFAIL

Domain appears completely unreachable

Email delivery fails entirely

Website inaccessible

Worse than no DNSSEC:

Without DNSSEC: works normally

With broken DNSSEC: total failure for validating resolvers

Prevention:

Monitor DNSSEC health

Automate key rotation

Test after any changes

Invalid seals cause document rejection. Worse than no seal at all.