l9scan
L9scan web crawler for scanning
About this crawler
l9scan is a web crawler identified by the regular-expression pattern l9scan in the User-Agent request header. It is categorised as scanner. Use the regex above to detect, log, allow, or block l9scan 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
- l9scan
- Pattern
l9scan- Tags
- scanner
- Reference
- https://github.com/LeakIX/l9scan
- Added
- 2026/04/07
- Instances
- 1 known sample(s)
Sample User-Agent strings
Mozilla/5.0 (l9scan/2.0; +https://github.com/LeakIX/l9scan)
Block this crawler
robots.txt — disallow l9scan:
User-agent: l9scan
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} l9scan [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "l9scan") {
return 403;
}
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