C
CMSChecker
CMS Checker web crawler for detection
About this crawler
CMSChecker is a web crawler identified by the regular-expression pattern CMSChecker in the User-Agent request header. It is categorised as seo. Use the regex above to detect, log, allow, or block CMSChecker 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
- CMSChecker
- Pattern
CMSChecker- Tags
- seo
- Added
- 2026/04/07
- Instances
- 1 known sample(s)
Sample User-Agent strings
Mozilla/5.0 (compatible; CMSChecker/1.0; +https://cmschecker.net)
Block this crawler
robots.txt — disallow CMSChecker:
User-agent: CMSChecker
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} CMSChecker [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "CMSChecker") {
return 403;
}
← back to all crawlers