RED
HTTP response testing and validation analyzer
About this crawler
RED is a web crawler identified by the regular-expression pattern RED\/ in the User-Agent request header. It is categorised as monitoring. Use the regex above to detect, log, allow, or block RED traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
0.065%
Technical details
- Name
- RED
- Pattern
RED\/- Tags
- monitoring
- Reference
- https://redbot.org/
- Added
- 2026/04/17
- Instances
- 1 known sample(s)
Sample User-Agent strings
RED/2.0.14 (https://redbot.org/)
Block this crawler
robots.txt — disallow RED:
User-agent: RED
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} RED\/ [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "RED\\/") {
return 403;
}
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