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origin-ip-discovery

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Discover origin IPs behind CDN/WAF via favicon hash, DNS history, and SSL certs.

recon/origin-ip-discovery/SKILL.md

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# Origin IP Discovery

Discover the real server IP behind CDN/WAF protections (Cloudflare, Akamai, Fastly). When the origin IP is found, the raw server is exposed without firewall rules, rate limiting, or application-layer filtering. Techniques include favicon hash fingerprinting across Shodan, historical DNS records from passive sources, SSL certificate SAN field matching, and Google Analytics ID cross-referencing.

## When to Use

- Target is behind Cloudflare/Akamai and returns 403 or CAPTCHA challenges on all requests.
- You need direct access to the origin to bypass WAF rules.
- Subdomain enumeration reveals internal/staging hosts on non-CDN IPs.
- The target uses a single favicon across all infrastructure.
- SSL certificates share the same organization name across IPs.

## Prerequisites