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AhrefsBot
Ahrefs SEO tool web crawler for link analysis
About this crawler
AhrefsBot is a web crawler identified by the regular-expression pattern Ahrefs(Bot|SiteAudit) in the User-Agent request header. It is categorised as seo. Use the regex above to detect, log, allow, or block AhrefsBot traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
5.1%
Technical details
- Name
- AhrefsBot
- Pattern
Ahrefs(Bot|SiteAudit)- Tags
- seo
- Added
- 2011/08/28
- rDNS suffixes
.ahrefs.com,.ahrefs.net- Instances
- 7 known sample(s)
rDNS verification (FCrDNS)
Verify a request is genuinely AhrefsBot 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.
.ahrefs.com.ahrefs.net
Sample User-Agent strings
Mozilla/5.0 (compatible; AhrefsBot/6.1; +http://ahrefs.com/robot/)
Mozilla/5.0 (compatible; AhrefsSiteAudit/6.1; +http://ahrefs.com/robot/)
Mozilla/5.0 (compatible; AhrefsBot/5.2; News; +http://ahrefs.com/robot/)
Mozilla/5.0 (compatible; AhrefsBot/5.2; +http://ahrefs.com/robot/)
Mozilla/5.0 (compatible; AhrefsSiteAudit/5.2; +http://ahrefs.com/robot/)
Mozilla/5.0 (compatible; AhrefsBot/6.1; News; +http://ahrefs.com/robot/)
Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)
Block this crawler
robots.txt — disallow AhrefsBot:
User-agent: AhrefsBot
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} Ahrefs(Bot|SiteAudit) [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "Ahrefs(Bot|SiteAudit)") {
return 403;
}
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