DNSSEC Validator

The DNSSEC Validator online tool provides a precise assessment of a domain’s DNSSEC deployment. It is used by DNS administrators, security engineers, hosting providers, and IT auditors who need an objective, reproducible assessment of the domain’s chain of trust. When there are signs of misconfiguration, potential spoofing risk, or migration-related issues, users rely on this tool to determine whether DNSSEC is correctly deployed and actively protecting queries at the root-to-zone boundary.
Core logic and features include DS verification, DNSKEY presence and alignment, and RRSIG status checks across authoritative servers. Required features cover chain-of-trust validation from the zone apex to the domain, DS record integrity, and key-tag verification. Optional/advanced capabilities include multi-resolver validation, batch domain checks, historical state comparisons, and exportable reports in JSON/CSV suitable for security baselines and CI pipelines.
Inputs & outputs: Input domain name, optional DNS resolver address, and a validation scope. Output fields indicate overall validity, chain status, DS presence, DNSKEY alignment, algorithms, key tags, signature validity windows, and a structured report suitable for audits. Outputs are designed for both human review and machine ingestion, enabling automated workflows and integration with security tooling.
Algorithms & calculations: The tool implements RFC-based DNSSEC checks: resolve delegation, verify DNSKEY against DS, validate RRSIG signatures, and compute chain validity from the root to the queried domain. It accounts for key rollover windows, algorithm deprecations, and zone misconfigurations. Results include explicit flags for issues such as missing DS, unsigned zones, or mismatched key material.
Error & Edge Cases: Handles NXDOMAIN, timeouts, and partial data; reports when a domain has no DNSSEC or when the chain cannot be validated due to external resolver failures. Provides remediation guidance at a technical level without UI messaging.
Industry/Region & Localization: Adheres to DNSSEC standards (RFC 4033/4034/4035, RFC 1035) and supports global TLDs. Timestamps are provided in UTC; no currency or country-specific constraints; suitable for international teams.
Assumptions & Exclusions: Assumes resolvable zones and accessible authoritative servers; excludes malware scanning, branding, legal compliance checks, and bulk data harvesting.