DNSScanner
DNS and network infrastructure security scanning crawler bot
About this crawler
DNSScanner is a web crawler identified by the regular-expression pattern DNSScanner in the User-Agent request header. It is categorised as scanner. Use the regex above to detect, log, allow, or block DNSScanner 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
- DNSScanner
- Pattern
DNSScanner- Tags
- scanner
- Reference
- https://rapef.info/_contacts/
- Added
- 2026/04/26
- Instances
- 1 known sample(s)
Sample User-Agent strings
DNSScanner
Block this crawler
robots.txt — disallow DNSScanner:
User-agent: DNSScanner
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} DNSScanner [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "DNSScanner") {
return 403;
}
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