DuckDuckGo-Favicons-Bot
DuckDuckGo favicon web crawler bot
About this crawler
DuckDuckGo-Favicons-Bot is a web crawler identified by the regular-expression pattern DuckDuckGo-Favicons-Bot in the User-Agent request header. It is categorised as search-engine. Use the regex above to detect, log, allow, or block DuckDuckGo-Favicons-Bot 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
- DuckDuckGo-Favicons-Bot
- Pattern
DuckDuckGo-Favicons-Bot- Tags
- search-engine
- Reference
- http://duckduckgo.com
- Added
- 2017/10/06
- rDNS suffixes
.duckduckgo.com- Instances
- 1 known sample(s)
rDNS verification (FCrDNS)
Verify a request is genuinely DuckDuckGo-Favicons-Bot 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.
.duckduckgo.com
Sample User-Agent strings
Mozilla/5.0 (compatible; DuckDuckGo-Favicons-Bot/1.0; +http://duckduckgo.com)
Block this crawler
robots.txt — disallow DuckDuckGo-Favicons-Bot:
User-agent: DuckDuckGo-Favicons-Bot
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} DuckDuckGo-Favicons-Bot [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "DuckDuckGo-Favicons-Bot") {
return 403;
}
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