DNSSEC signing
Whether the DNS zone is signed, so a forged DNS answer can be detected. Worth having and far from universal — most domains are unsigned, and that is a fact rather than a defect.
DNSSEC adds cryptographic signatures to DNS answers. A resolver that validates them can tell a genuine answer for your domain from a forged one, which protects visitors against cache poisoning and certain man-in-the-middle attacks that redirect a domain to a different server.
It is valuable but far from universal: most domains in the world are unsigned, and many hosting setups make it awkward. That is why the report shows an unsigned zone as a neutral fact, not as a problem.
How SiteScan checks
The scan asks for the DS record of the registrable domain — the record the parent zone (for example .com) publishes to vouch for your zone's signing key. If a DS record exists, the zone counts as signed. The same information can also appear in the Domain registration group, where it comes from the registry's own data.
How to enable it
- With most managed DNS providers (Cloudflare, Route 53, many registrars) it is a single switch: the provider signs the zone and either publishes the DS record itself or gives you the values to enter at your registrar.
- If DNS and registrar are separate, copy the DS record exactly; a wrong or stale DS makes the whole domain unresolvable for validating resolvers.
- Before moving the domain to another DNS provider, disable DNSSEC or plan the key handover first.
Related: nameservers and CAA.
See this check on your own site
Run a free scan: the report shows this row for your domain along with the other checks of the site audit.
More in “DNS & email”
What SiteScan checks
TLS certificate
- TLS certificate expiry
- Outdated TLS versions (TLS 1.0/1.1)
- TLS certificate chain
- TLS certificate issuer
- Certificate signature algorithm
Domain registration
- Domain registration expiry
- Registered domain name
- Domain registrar
- Domain registration date
- Domain last updated date
- Domain status codes (EPP)
- Domain transfer lock
- Registrar abuse contact
- RDAP and WHOIS data source
Indexing
- robots.txt file
- CSS and JS blocked in robots.txt
- XML sitemap
- Sitemap index file
- Off-domain URLs in the sitemap
- Sitemap lastmod dates
- Broken URLs in the sitemap
- RSS and Atom feed
Addresses & redirects
Security headers
- HTTP security headers and grade
- Strict-Transport-Security (HSTS) header
- Content-Security-Policy (CSP) header
- X-Content-Type-Options: nosniff
- X-Frame-Options and clickjacking
- Referrer-Policy header
- Permissions-Policy header
- HSTS preload list
- CORS and cross-origin reads
- HTTP TRACE method
Delivery & reputation
- Cache-Control header for HTML
- ETag and Last-Modified revalidation
- HTTP/3 and QUIC support
- Server version disclosure in headers
- DNS blocklist (DNSBL) check
Internal links
Exposure
- Exposed sensitive files (.env, .git, backups)
- Directory listing enabled
- Public JavaScript source maps
- Exposed WordPress endpoints
Well-known files
- security.txt file
- llms.txt for AI assistants
- llms-full.txt file
- ads.txt authorized sellers file
- humans.txt file
- Well-known change-password URL
DNS & email
- MX records (mail servers)
- SPF record
- DMARC record and policy
- DNSSEC signing
- CAA record
- Nameserver redundancy
- IPv6 support (AAAA record)
- MTA-STS policy
- TLS-RPT reporting record
- BIMI record (brand logo in email)
- Wildcard DNS record
- Dangling CNAME and subdomain takeover
Privacy & consent
- Analytics and tracking scripts
- Cookie consent banner
- Privacy policy link
- Terms of service link
- Imprint (Impressum)
- Accessibility statement
Core Web Vitals
- Lighthouse performance score
- Largest Contentful Paint (LCP)
- Cumulative Layout Shift (CLS)
- Interaction to Next Paint (INP)
- CrUX field data vs lab data