YoudaoBot
Chinese search engine and translation service crawler bot
About this crawler
YoudaoBot is a web crawler identified by the regular-expression pattern YoudaoBot in the User-Agent request header. It is categorised as search-engine. Use the regex above to detect, log, allow, or block YoudaoBot traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
0.65%
Technical details
- Name
- YoudaoBot
- Pattern
YoudaoBot- Tags
- search-engine
- Reference
- http://youdao.com/help/webmaster/spider/
- Added
- 2026/04/26
- rDNS suffixes
.youdao.com- Instances
- 1 known sample(s)
rDNS verification (FCrDNS)
Verify a request is genuinely YoudaoBot 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.
.youdao.com
Sample User-Agent strings
YoudaoBot
Block this crawler
robots.txt — disallow YoudaoBot:
User-agent: YoudaoBot
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} YoudaoBot [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "YoudaoBot") {
return 403;
}
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