Robots.txt Is 200 but Unreachable to Google: A Network Diagnostic
Diagnose a crawler-facing robots.txt failure across DNS, IPv4 and IPv6, TLS, CDN, WAF, redirects, and origin logs instead of trusting one browser request.
SearchEngineAnswer
Founder & Editor · SEO Champion
SEO Champion | Google News, Google Discover & AI Search Expert | Founder of MustHave.ai, Abdessalam.ai & SearchEngineAnswer.com
Experience: Google News, Google Discover, and AI Search specialist; founder of MustHave.ai, Abdessalam.ai, and SearchEngineAnswer.com.
Research, guides & workflows
Evidence-led articles for publishers, marketers, founders, and SEO practitioners who need a clear decision—not another pile of terminology.
Diagnose a crawler-facing robots.txt failure across DNS, IPv4 and IPv6, TLS, CDN, WAF, redirects, and origin logs instead of trusting one browser request.
Apply a 12-point launch gate to decide whether an AI-assisted tool library provides distinct utility or produces thin indexable templates at scale.
Choose what to do with an expired event, offer, deadline, or annual page using reader intent, replacement equivalence, historical value, accuracy, and recurring demand.
A publisher’s guide to Googlebot, OAI-SearchBot, GPTBot, ClaudeBot, PerplexityBot, Applebot, Amazonbot and other documented crawlers—what each one does, which controls it respects, and how to prepare a website for AI search without confusing crawling with citation.
Answer Engine Optimization (AEO) is the work of making content eligible, clear, verifiable, and measurable across systems that generate direct answers. This guide separates durable practices from citation and schema myths.
A test protocol for comparing Duck.ai voice and text web-search answers across transcription, location, sources, citations, timestamps, and repeated runs.
A preregistered protocol for comparing accessibility-tree, static HTML, rendered HTML, and screenshot representations on identical browser-agent tasks.
Choose You.com Web Search GET or POST by comparing cache behavior, domain-list encoding, URL limits, filter precedence, redacted keys, and time-sensitive results.
Connect deployments to observable Cloudflare AI Search sync jobs with job IDs, state, logs, changed-file evidence, retries, cancellation, and sentinel retrieval.
How the work is produced
SearchEngineAnswer separates documented facts from interpretation, shows important limits, and keeps meaningful corrections visible.
Current primary documentation is preferred for material facts and product behavior.
Recommendations include their scope, uncertainty, tradeoffs, and known limitations.
Each page aims to add a framework, test, checklist, tool, or example readers can use.
The Answer Brief
Get practical SEO and AI-search guidance, new experiments, and the workflows worth keeping.
Unsubscribe anytime. Your inbox stays yours.
Practical, evidence-based answers for earning visibility in search engines and AI answers.
Get the Chrome extension Read the living case study
Independent publication. Sources, corrections, authorship, and commercial relationships are disclosed openly.
Search the publication
Search reporting, guides, research, checklists, and browser tools.
SearchEngineAnswer app
Install the site on your home screen for a focused, standalone reading experience. No app-store account is required.
On iPhone or iPad, open the browser Share menu and choose “Add to Home Screen.” On other devices, use your browser’s Install option when available.
Privacy controls
Required for security, saved controls, and remembering this choice.
No analytics service is currently configured.
No advertising or behavioral targeting is currently configured.