A Responsible Method for Reconnaissance on Public Web Surfaces
Reconnaissance — "recon" — is the practice of gathering information about a target before engaging with it. In due diligence, security research and competitive analysis, it is almost always the first step.
What makes recon responsible
- Legality. Respect applicable law and local equivalents. Never bypass access controls, even trivial ones.
- Ethics. Do not exploit findings to harm. If you discover a vulnerability, disclose it responsibly.
- Transparency. Document your method. Be honest about what you checked and why.
- Proportionality. Use the least-intrusive method first. Public data before active probing.
A three-phase approach
Phase 1 — Passive collection
Gather without touching the target: DNS, search engines, certificate transparency logs, the Wayback Machine.
Phase 2 — Polite, active requests
Interact with the target, but respect robots.txt, rate limits, and a
realistic User-Agent. A single HTTPS request to the homepage is fine;
fifty requests per second to /search?q=… is not.
Phase 3 — Deeper analysis, only when justified
Port scans, vulnerability scans and anything authenticated require explicit permission or a clear legal basis.
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