GC
grub-client
Grub search engine web crawler for indexing
About this crawler
grub-client is a web crawler identified by the regular-expression pattern grub-client in the User-Agent request header. It is categorised as search-engine. Use the regex above to detect, log, allow, or block grub-client traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
0.65%
Technical details
- Name
- grub-client
- Pattern
grub-client- Tags
- search-engine
- rDNS suffixes
.grub.org- Instances
- 11 known sample(s)
rDNS verification (FCrDNS)
Verify a request is genuinely grub-client 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.
.grub.org
Sample User-Agent strings
Mozilla/4.0 (compatible; grub-client-0.3.0; Crawl your own stuff with http://grub.org)
Mozilla/4.0 (compatible; grub-client-1.0.4; Crawl your own stuff with http://grub.org)
Mozilla/4.0 (compatible; grub-client-1.0.5; Crawl your own stuff with http://grub.org)
Mozilla/4.0 (compatible; grub-client-1.0.6; Crawl your own stuff with http://grub.org)
Mozilla/4.0 (compatible; grub-client-1.0.7; Crawl your own stuff with http://grub.org)
Mozilla/4.0 (compatible; grub-client-1.1.1; Crawl your own stuff with http://grub.org)
Mozilla/4.0 (compatible; grub-client-1.2.1; Crawl your own stuff with http://grub.org)
Mozilla/4.0 (compatible; grub-client-1.3.1; Crawl your own stuff with http://grub.org)
Mozilla/4.0 (compatible; grub-client-1.3.7; Crawl your own stuff with http://grub.org)
Mozilla/4.0 (compatible; grub-client-1.4.3; Crawl your own stuff with http://grub.org)
Mozilla/4.0 (compatible; grub-client-1.5.3; Crawl your own stuff with http://grub.org)
Block this crawler
robots.txt — disallow grub-client:
User-agent: grub-client
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} grub-client [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "grub-client") {
return 403;
}
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