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CDN / WAF detection
Methodology v7 · canonical ID cdn-waf-detection · Infrastructure · informational · census as of July 28, 2026
Whether a content-delivery network / web-application firewall is protecting your site.
Definition
| Canonical ID | cdn-waf-detection |
|---|---|
| Category | Infrastructure |
| Grade impact | Informational — never moves the grade |
| Pass | Informational fingerprint — reports which CDN/WAF (if any) fronts the site; never moves the grade. |
| Fail | Not applicable (informational — no fail state). |
| Example (passing) | Response fingerprint indicates a CDN in front of the origin |
No-data rule: when this check couldn't be determined for a domain (timeout, SERVFAIL, redacted
source) it returns N/A and is excluded from that domain's scoring denominator — "couldn't determine"
is never counted as a failure. "Determined absent" is a real fail.
Prevalence across the census
The public census rollup does not publish a per-check figure for cdn-waf-detection (as of July 28, 2026).
Whole-census aggregates live at /data; no number is shown here rather than an estimated one.
Census denominator: 275,666,275 graded domains. Aggregates only — never an individual domain's result.
Fix it
Plain-English impact, cost of ignoring it, and step-by-step remediation: defaults.exposed/en/fix/infrastructure
Cite this check
Defaults.Exposed, "CDN / WAF detection (cdn-waf-detection)", Grading Methodology v7 (census as of July 28, 2026). https://defaults.exposed/methodology/v7/cdn-waf-detection
Permalink: https://defaults.exposed/methodology/v7/cdn-waf-detection ·
All 34 checks: v7 registry ·
Machine-readable: checks.json ·
Licence: open data