CH

check_http

monitoring check_http

Nagios check_http monitoring plugin

About this crawler

check_http is a web crawler identified by the regular-expression pattern check_http in the User-Agent request header. It is categorised as monitoring. Use the regex above to detect, log, allow, or block check_http traffic in your web server, CDN edge rules, or robots.txt.

Block-rate · top 25k sites

0.065%
latest snapshot
2026-06-04
matched key: check_http
2026-05-012026-06-040.11%

Technical details

Name
check_http
Pattern
check_http
Tags
monitoring
Added
2018/02/09
Instances
1 known sample(s)

Sample User-Agent strings

check_http/v2.2.1 (nagios-plugins 2.2.1)

Block this crawler

robots.txt — disallow check_http:

User-agent: check_http Disallow: /

Apache .htaccess — return 403:

RewriteEngine On RewriteCond %{HTTP_USER_AGENT} check_http [NC] RewriteRule .* - [F,L]

Nginx — return 403 inside a server block:

if ($http_user_agent ~* "check_http") { return 403; }
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