Analyze server access logs to measure crawl budget and identify Googlebot hits with reverse DNS verification

domain: developers.google.com · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗

Steps

  1. Collect raw access logs from your web server (Apache, Nginx, or CDN log export) and filter log lines where the User-Agent field contains Googlebot to identify candidate bot requests
  2. For each candidate IP address, perform a reverse DNS lookup (PTR record) to confirm the hostname resolves to a domain ending in .googlebot.com or .google.com
  3. Forward-confirm the verified IPs by resolving the returned hostname back to an IP address and checking it matches the original request IP; only requests that pass both reverse and forward DNS checks are genuine Googlebot
  4. Aggregate verified Googlebot requests by URL path, response code, and time of day to identify crawl budget allocation, frequently crawled URLs, and URLs returning error codes to Googlebot
  5. Identify crawl budget waste by finding high-crawl-frequency URLs that return 404, 302 chains, or soft 404s, and fix or block them to reclaim budget for important pages

Known gotchas

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