Free WAF Checker & Web Application Firewall Detection Tool

Free tool

Fingerprint your WAF and CDN from passive header signals like CF-Ray, X-Sucuri-ID, and X-Akamai. Safe on production, no challenge pages triggered.

  • WAF presence detection via headers
  • CDN and edge security identification
  • Security headers analysis
No credit card requiredProduction-safe (100% passive)No setup or code required
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What you get for free

18 core security checks via this tool, passive scans, step-by-step remediation, security score on every result.

What Essential adds at $39/mo

+17 advanced checks, continuous monitoring, daily security score history, email alerts, GitHub SAST, board-ready PDFs, SOC 2 / ISO 27001 / PCI reports.

What to do with WAF check results

After checking your WAF protection, use the results to improve your security:

  • Verify WAF presence: If WAF is detected, confirm it's properly configured in your WAF management console
  • Check WAF configuration: Review WAF rules and settings in your WAF platform (Cloudflare, AWS WAF, etc.)
  • Review security headers: Ensure security headers are properly configured
  • If no WAF detected: Consider implementing a WAF solution if your site handles sensitive data

Note: This tool only detects WAF presence through headers. For detailed WAF rule configuration, rate limiting, bot protection, and active security testing, use your WAF management console or professional security assessments.

Why WAF checking matters

Verifying your WAF configuration helps ensure your website is properly protected. This tool helps you:

  • Verify WAF presence: Confirm WAF/CDN is detected and active
  • Identify WAF provider: Determine which WAF or CDN service is protecting your site
  • Check security headers: Review security headers that may indicate WAF protection
  • Compliance validation: Verify WAF presence for compliance requirements

Use this WAF checker to verify WAF presence through passive header analysis. For detailed WAF configuration, rule testing, and active protection verification, use your WAF management console or professional security testing.

How Barrion verifies this

Barrion treats WAF detection as a passive fingerprinting problem rather than an active probe. We issue a small number of normal-looking HTTP requests to the target and inspect the response surface, the Server header, vendor-specific markers like CF-Ray, X-Amz-Cf-Id, X-Sucuri-ID, X-Akamai-*, cookie names, and TLS/edge behaviour. No challenge pages are triggered and no payloads are sent, so the check is safe to run against production without polluting logs or tripping rate limits.

Header signals are then matched against a vendor map covering the major cloud WAFs and CDNs (Cloudflare, AWS WAF / CloudFront, Akamai, Sucuri, Imperva, Fastly, Azure Front Door, F5, Wallarm, and others). A confidence score is derived from how many independent signals point at the same vendor. A single Server: cloudflare is weaker evidence than that header plus a CF-Ray plus a __cf_bm cookie.

Because this is a passive check, Barrion is explicit about what it cannot see: rule sets, rate-limit thresholds, bot management posture, and whether the WAF is in detect-only or block mode. For those, results from this tool should be paired with your WAF console and a full Barrion scan that correlates WAF presence with the rest of your security headers, TLS posture, and exposed endpoints.

What this WAF checker detects

WAF Presence Detection:
  • WAF/CDN identification via Server headers (Cloudflare, AWS CloudFront, Akamai, etc.)
  • WAF-specific headers (X-WAF, X-Protected-By, CF-Ray, etc.)
  • CDN and edge security provider identification
  • Header-based WAF vendor detection
Security Headers Analysis:
  • Security headers that may indicate WAF presence
  • Custom security headers
  • Header configuration analysis
Limitations:
  • This tool uses passive header analysis only
  • Cannot detect WAF rules, rate limiting, or bot protection mechanisms
  • Cannot test challenge pages or active protection features
  • WAF presence detection depends on headers being exposed

Tool-specific questions

What is a Web Application Firewall (WAF)?

A WAF is a security solution that filters, monitors, and blocks HTTP/HTTPS traffic to and from web applications. It protects against common attacks like SQL injection, XSS, and DDoS. WAFs can be cloud-based (like Cloudflare, AWS WAF) or on-premise solutions.

How does this tool detect WAF protection?

Our WAF checker uses passive analysis of HTTP headers to identify WAF presence. We analyze Server headers, WAF-specific headers (X-WAF, X-Protected-By, CF-Ray for Cloudflare), and other header indicators that reveal WAF or CDN providers. We do not perform active testing, trigger challenge pages, or test rate limiting.

What's the difference between a WAF and a regular firewall?

A regular firewall filters network traffic at the network layer, while a WAF operates at the application layer (HTTP/HTTPS). WAFs understand web application protocols and can detect and block application-specific attacks like SQL injection and XSS, while regular firewalls focus on network-level threats.

Do I need a WAF if I have other security controls?

WAFs provide an additional layer of defense and are recommended for production websites. They complement other security controls like security headers, TLS configuration, and secure coding practices. WAFs are especially valuable for protecting against automated attacks and zero-day vulnerabilities.

What are challenge pages and why do WAFs use them?

Challenge pages (like CAPTCHA or JavaScript challenges) are used by WAFs to verify that requests come from real browsers rather than bots. However, our tool uses passive header analysis and cannot detect challenge pages, as they would require active testing to trigger. To verify challenge page functionality, test your WAF directly or review WAF logs.

How do I know if my WAF is working correctly?

Use our WAF checker to verify WAF presence through header analysis. For detailed WAF configuration and rule effectiveness, review WAF logs in your WAF management console, monitor false positive rates, and test your WAF with known attack patterns. Our tool only detects WAF presence, not rule configuration or effectiveness.

What should I do if no WAF is detected?

If no WAF is detected, consider implementing a WAF solution. Cloud-based WAFs like Cloudflare, AWS WAF, or Akamai are easy to deploy. Alternatively, implement on-premise WAF solutions. Our tool helps identify when WAF protection is missing.

Can this tool help with WAF configuration?

Our tool detects WAF presence and configuration indicators, but detailed WAF rule configuration requires access to your WAF management console. Use our tool to verify WAF is active, then configure rules in your WAF platform based on your specific security needs.

Is WAF protection required for compliance?

Many compliance frameworks (PCI DSS, SOC 2, ISO 27001) recommend or require WAF protection for web applications handling sensitive data. Our tool helps verify WAF presence for compliance audits and security assessments.
Why Barrion

Built for the engineers who already have enough to fix.

Speed

Real-time results

Instant analysis with a detailed report. You see findings as the scan runs, not after.
Coverage

Comprehensive checks

35+ checks per scan covering TLS, headers, CORS, cookies, DNS, email auth, and more, in a single pass.
Action

Step-by-step fixes

Every finding ships with the exact remediation step for your framework. Hand it to the engineer who owns the surface.
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Related guides

Go deeper on the same topic.

Guide

Advanced Web Security Testing

Long-form implementation guide from the Barrion engineering blog.
FAQ

Frequently asked.

What is Barrion and how does it enhance website security?
Barrion is a security testing and monitoring platform for engineering teams, covering three products: passive DAST that continuously watches your live web apps and APIs, SAST via GitHub that scans your codebase for secrets, insecure patterns and vulnerable dependencies, and AI pentesting that runs active, agent-driven attacks with proof-of-exploit. Findings come with step-by-step fixes you can ship immediately.
How safe is Barrion to use for security testing?
Every default Barrion scan is 100% passive and read-only. We never submit forms, brute-force endpoints or interact with state-changing routes, so it's safe to run against production.
What types of security issues does Barrion identify?
Barrion is a security testing and monitoring platform, so coverage spans three surfaces. Passive DAST flags misconfigurations across TLS/HTTPS, security headers, cookie flags, CORS policy, DNS records, email authentication (SPF/DKIM/DMARC), network exposure and common web hygiene issues. SAST via GitHub finds secrets in code, insecure patterns and vulnerable dependencies. AI pentesting adds exploitable findings like SQL injection, XSS and broken access control with proof-of-exploit.
What specific security checks does Barrion perform?
Barrion checks TLS/HTTPS configuration, HTTP security headers, cookie flags, CORS policy, DNS and email authentication records, network exposure and common web hygiene issues, then prioritises them by severity with clear remediation.
What is Barrion's smart crawling?
Smart crawling automatically discovers the pages and endpoints of your app so scans cover the surface that matters, without you manually listing every URL.
How often does Barrion perform security scans?
Manual scans on demand. Continuous monitoring runs automatically on Essential (weekly+) and Business (daily), and alerts you the moment a new issue appears.
Is Barrion suitable for security testing of all business sizes?
Yes. Barrion is a security testing and monitoring platform, with passive DAST, SAST via GitHub and AI pentesting available to solo developers, startups, scale-ups and enterprise security teams alike, without adding headcount.
How does Barrion handle data security and privacy during security testing?
Scans are passive and read-only by default, and we never store or expose sensitive data from your application. Pentests are rate-limited and non-destructive, designed to confirm exploitability without altering data or affecting availability.
What if I'm not satisfied with Barrion's security testing service?
Paid plans start with a free trial, and you can cancel anytime. If something isn't right, contact us and we'll make it work for your team.
How does Barrion help with SOC 2, ISO 27001, NIS2, and other compliance frameworks?
Barrion produces audit-ready PDF and CSV reports suitable for SOC 2, ISO 27001, PCI DSS and NIS2, ready to share with auditors, customers and your board.

Anything else? Email contact@barrion.io.

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