ltbot
TU Darmstadt semantic web crawler
About this crawler
ltbot is a web crawler identified by the regular-expression pattern ltbot in the User-Agent request header. It is categorised as academic. Use the regex above to detect, log, allow, or block ltbot traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
0.065%
Technical details
- Name
- ltbot
- Pattern
ltbot- Tags
- academic
- Reference
- http://www.kdsl.tu-darmstadt.de/de/kdsl/research-program/crawling-and-semantic-structuring/
- Added
- 2026/05/09
- Instances
- 2 known sample(s)
Sample User-Agent strings
Mozilla/5.0 (compatible; ltbot/0.3.6 +http://www.kdsl.tu-darmstadt.de/de/kdsl/research-program/crawling-and-semantic-structuring/)
Mozilla/5.0 (compatible; ltbot/3.2.0.10 +http://www.kdsl.tu-darmstadt.de/de/kdsl/research-program/crawling-and-semantic-structuring/)
Block this crawler
robots.txt — disallow ltbot:
User-agent: ltbot
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} ltbot [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "ltbot") {
return 403;
}
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