DuplexWeb-Google
Google Assistant automated web interaction for reservations and purchases
About this crawler
DuplexWeb-Google is a web crawler identified by the regular-expression pattern DuplexWeb-Google in the User-Agent request header. It is categorised as browser-automation. Use the regex above to detect, log, allow, or block DuplexWeb-Google 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
- DuplexWeb-Google
- Pattern
DuplexWeb-Google- Tags
- browser-automation
- Reference
- https://searchengineland.com/google-shut-down-duplex-on-the-web-389999
- Added
- 2026/05/02
- rDNS suffixes
.1e100.net,.googlebot.com,.googleusercontent.com- Instances
- 1 known sample(s)
rDNS verification (FCrDNS)
Verify a request is genuinely DuplexWeb-Google 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.
.1e100.net.googlebot.com.googleusercontent.com
Sample User-Agent strings
Mozilla/5.0 (Linux; Android 11; Pixel 2; DuplexWeb-Google/1.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.193 Mobile Safari/537.36
Block this crawler
robots.txt — disallow DuplexWeb-Google:
User-agent: DuplexWeb-Google
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} DuplexWeb-Google [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "DuplexWeb-Google") {
return 403;
}
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