Diffbot
Diffbot web crawler for content extraction
About this crawler
Diffbot is a web crawler identified by the regular-expression pattern Diffbot\/ in the User-Agent request header. It is categorised as seo. Use the regex above to detect, log, allow, or block Diffbot traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
4.0%
Technical details
- Name
- Diffbot
- Pattern
Diffbot\/- Tags
- seo
- Reference
- https://www.diffbot.com/
- Added
- 2018/07/07
- rDNS suffixes
.diffbot.com- Instances
- 1 known sample(s)
rDNS verification (FCrDNS)
Verify a request is genuinely Diffbot 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.
.diffbot.com
Sample User-Agent strings
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.2) Gecko/20090729 Firefox/3.5.2 (.NET CLR 3.5.30729; Diffbot/0.1; +http://www.diffbot.com)
Block this crawler
robots.txt — disallow Diffbot:
User-agent: Diffbot
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} Diffbot\/ [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "Diffbot\\/") {
return 403;
}
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