SEMrushBot
Semrush SEO tool web crawler for analysis
About this crawler
SEMrushBot is a web crawler identified by the regular-expression pattern S[eE][mM]rushBot in the User-Agent request header. It is categorised as seo. Use the regex above to detect, log, allow, or block SEMrushBot traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
0.26%
Technical details
- Name
- SEMrushBot
- Pattern
S[eE][mM]rushBot- Tags
- seo
- Reference
- https://www.semrush.com:443/bot/
- Added
- 2015/05/26
- rDNS suffixes
.semrush.com- Instances
- 8 known sample(s)
rDNS verification (FCrDNS)
Verify a request is genuinely SEMrushBot 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.
.semrush.com
Sample User-Agent strings
Mozilla/5.0 (compatible; SemrushBot-SA/0.97; +http://www.semrush.com/bot.html)
Mozilla/5.0 (compatible; SemrushBot-SI/0.97; +http://www.semrush.com/bot.html)
Mozilla/5.0 (compatible; SemrushBot/3~bl; +http://www.semrush.com/bot.html)
Mozilla/5.0 (compatible; SemrushBot/0.98~bl; +http://www.semrush.com/bot.html)
Mozilla/5.0 (compatible; SemrushBot-BA; +http://www.semrush.com/bot.html)
Mozilla/5.0 (compatible; SemrushBot/6~bl; +http://www.semrush.com/bot.html)
Mozilla/5.0 (compatible; SemrushBot/7~bl; +http://www.semrush.com/bot.html)
SEMrushBot
Block this crawler
robots.txt — disallow SEMrushBot:
User-agent: SEMrushBot
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} S[eE][mM]rushBot [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "S[eE][mM]rushBot") {
return 403;
}
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