DNSSEC Validator

DNSSEC is a suite of extensions to DNS that provides:

• Origin Authentication: Verification that DNS data comes from the stated source
• Data Integrity: Assurance that data hasn't been modified during transit
• Authenticated Denial of Existence: Proof that a requested DNS record does not exist

DNSSEC works by adding digital signatures to DNS records. These signatures can be verified by resolvers to ensure the data hasn't been tampered with. It creates a chain of trust from the DNS root zone down to individual domain records.

DNS was designed in the early days of the internet without built-in security mechanisms. This makes it vulnerable to various attacks, particularly cache poisoning (also known as DNS spoofing). In a cache poisoning attack, an attacker injects false information into a DNS resolver's cache, causing it to return incorrect IP addresses and potentially redirecting users to malicious websites.

DNSSEC addresses these vulnerabilities by:

DNSSEC uses public key cryptography to sign DNS records. Here's a simplified explanation of how it works:

DNSSEC validation is the process of verifying the digital signatures in DNS responses. There are two main types of validation:

Our DNSSEC Validator tool allows you to check if a domain has properly implemented DNSSEC and verify the validity of its DNSSEC signatures:

1. Enter your domain name in the input field
2. Click the "Validate DNSSEC" button
3. Wait while our tool performs a comprehensive DNSSEC validation
4. Review the detailed results, which include:
   • DNSSEC implementation status
   • Validation results for the chain of trust
   • Details of DNSKEY, DS, and RRSIG records
   • Any issues or inconsistencies detected
   • Recommendations for improving your DNSSEC implementation

Our DNSSEC Validator tool provides detailed information about your domain's DNSSEC implementation. Here's how to interpret the key sections:

If you haven't implemented DNSSEC yet, here's a general overview of the process:

1. Check DNS Provider Support: Ensure your DNS provider supports DNSSEC. Many major providers like Cloudflare, AWS Route 53, and Google Cloud DNS offer DNSSEC support.
2. Enable DNSSEC at Your DNS Provider: This typically involves:
   • Generating ZSK and KSK pairs
   • Signing your zone
   • Publishing DNSKEY records
3. Add DS Record at Your Registrar: After enabling DNSSEC at your DNS provider, you'll need to add a DS record at your domain registrar. Your DNS provider will give you the necessary DS record information.
4. Verify Implementation: Use our DNSSEC Validator tool to verify that DNSSEC is properly implemented.
5. Monitor: Regularly check your DNSSEC implementation to ensure signatures haven't expired and everything is working correctly.

• Use Strong Algorithms: Prefer ECDSA (algorithm 13 or 14) or RSA with SHA-256 (algorithm 8) for better security and smaller signatures.
• Appropriate Key Sizes: For RSA, use at least 2048 bits for KSK and ZSK. For ECDSA, P-256 (algorithm 13) or P-384 (algorithm 14) are recommended.
• Regular Key Rotation: Rotate your ZSK regularly (e.g., every 1-3 months) and your KSK less frequently (e.g., every 1-2 years).
• Signature Validity Period: Set appropriate signature validity periods. Too short can cause validation failures if there are issues, too long increases the window of vulnerability.
• Monitor Signature Expiration: Set up monitoring to alert you before signatures expire.
• Test Before Deployment: Test your DNSSEC implementation in a staging environment before deploying to production.
• Have a Rollback Plan: Be prepared to quickly disable DNSSEC if issues arise that can't be immediately resolved.
• Implement NSEC3 with Opt-Out: If your zone has many delegations, consider using NSEC3 with opt-out to reduce zone size.