Verify DNSSEC signatures and chain of trust for any domain.
DNSSEC Validator
Enter a domain to check its DNSSEC configuration and validate signatures.
About DNSSEC
DNSSEC (Domain Name System Security Extensions) is a suite of extensions to DNS that adds an additional layer of security to the DNS lookup and exchange processes. It provides authentication to verify that the DNS data received is identical to the DNS data published by the domain owner.
Why DNSSEC Matters
Authentication: Ensures DNS responses come from the authoritative source
Data Integrity: Verifies that data hasn't been modified in transit
Protection Against Attacks: Helps prevent DNS spoofing and cache poisoning attacks
Chain of Trust: Creates a hierarchical trust model from the root zone down
Key DNSSEC Records
DNSKEY: Contains the public key used to verify signatures
DS (Delegation Signer): Creates the chain of trust between parent and child zones
RRSIG (Resource Record Signature): Contains the digital signatures for DNS records
NSEC/NSEC3: Provides authenticated denial of existence for DNS records
Common DNSSEC Issues
Expired Signatures: RRSIG records have a validity period and must be renewed
Key Rollover Problems: Issues during the process of changing cryptographic keys
Missing DS Records: Breaks the chain of trust from parent to child zone
Algorithm Mismatches: Using different algorithms for signing and verification
DNSSEC Validation Process
Our DNSSEC validator checks the entire chain of trust, from the root zone down to the requested domain. It verifies the presence and validity of DNSKEY, DS, and RRSIG records, and ensures that signatures are valid and have not expired. The validation process follows the same steps that a DNSSEC-aware resolver would take to validate the domain's DNS records.