Glossary · Crawlers and access
ASN blocking
Refusing traffic by hosting network rather than by identity. It blocks retrieval agents running on cloud infrastructure — which is most of them — while leaving residential proxies untouched, so it usually costs more visibility than it prevents scraping.
Terms this definition uses
Crawlers and access
Who is fetching, whether they are who they claim, and what your rules actually permit.
retrieval crawler · user-triggered fetch · verified crawler · forged crawler identity · unverifiable · robots.txt · user-agent group · AI opt-out · Content-Signal · crawl budget · cloaking · challenge page at 200 · uniform refusal · nonexistent-path control · blocked render resource · off-host redirect · homepage refused · FCrDNS · Crawler trap · Conditional request · operator feed · residential proxy · Google-Extended · Google-Agent · GPTBot vs OAI-SearchBot · ClaudeBot vs Claude-User · PerplexityBot vs Perplexity-User · CCBot · Bytespider · agentic traffic · crawler classification
← Conditional request · operator feed →
See it in the full glossary · 579 terms across 19 areas. Scan a site to see which of these apply to it.