CCBot
Common Crawl web crawler for indexing
About this crawler
CCBot is a web crawler identified by the regular-expression pattern CCBot in the User-Agent request header. It is categorised as ai-crawler. Use the regex above to detect, log, allow, or block CCBot traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
9.1%
Technical details
- Name
- CCBot
- Pattern
CCBot- Tags
- ai-crawler
- Reference
- https://www.commoncrawl.org/ccbot
- Added
- 2012/02/05
- rDNS suffixes
.commoncrawl.org- Instances
- 2 known sample(s)
rDNS verification (FCrDNS)
Verify a request is genuinely CCBot with forward-confirmed reverse DNS: the client IP's PTR record must end in one of the suffixes below and a forward A/AAAA lookup of that hostname must return the same IP. UA strings alone are spoofable; FCrDNS is not.
.commoncrawl.org
Sample User-Agent strings
CCBot/2.0 (http://commoncrawl.org/faq/)
CCBot/2.0 (https://commoncrawl.org/faq/)
Block this crawler
robots.txt — disallow CCBot:
User-agent: CCBot
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} CCBot [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "CCBot") {
return 403;
}
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