URLfilterDB-crawler
URL filter database
About this crawler
URLfilterDB-crawler is a web crawler identified by the regular-expression pattern URLfilterDB-crawler in the User-Agent request header. It is categorised as scanner. Use the regex above to detect, log, allow, or block URLfilterDB-crawler 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
- URLfilterDB-crawler
- Pattern
URLfilterDB-crawler- Tags
- scanner
- Reference
- https://www.webrobots.de/bot/urlfilterdb-crawler/
- Added
- 2026/05/03
- Instances
- 1 known sample(s)
Sample User-Agent strings
Mozilla/5.0 (URLfilterDB-crawler/1.1) ufdb/1.0
Block this crawler
robots.txt — disallow URLfilterDB-crawler:
User-agent: URLfilterDB-crawler
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} URLfilterDB-crawler [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "URLfilterDB-crawler") {
return 403;
}
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