OpenfosBot
Openfos web crawler
About this crawler
OpenfosBot is a web crawler identified by the regular-expression pattern OpenfosBot in the User-Agent request header. It is categorised as seo. Use the regex above to detect, log, allow, or block OpenfosBot traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
No block-rate data for this crawler.
Technical details
- Name
- OpenfosBot
- Pattern
OpenfosBot- Tags
- seo
- Reference
- http://www.openfos.com
- Added
- 2026/05/09
- Instances
- 2 known sample(s)
Sample User-Agent strings
Mozilla/5.0 (compatible; OpenfosBot/2.1; http://www.openfos.com)
Mozilla/5.0 (compatible; OpenfosBot/2.4; +http://www.openfos.com)
Block this crawler
robots.txt — disallow OpenfosBot:
User-agent: OpenfosBot
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} OpenfosBot [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "OpenfosBot") {
return 403;
}
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