Amazon CloudFront
Amazon CloudFront web crawler bot
About this crawler
Amazon CloudFront is a web crawler identified by the regular-expression pattern Amazon CloudFront in the User-Agent request header. It is categorised as http-library. Use the regex above to detect, log, allow, or block Amazon CloudFront traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
0.065%
Technical details
- Name
- Amazon CloudFront
- Pattern
Amazon CloudFront- Tags
- http-library
- Reference
- https://aws.amazon.com/cloudfront/
- Added
- 2018/09/07
- rDNS suffixes
.amazon.com,.amazonaws.com- Instances
- 1 known sample(s)
rDNS verification (FCrDNS)
Verify a request is genuinely Amazon CloudFront 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.
.amazon.com.amazonaws.com
Sample User-Agent strings
Amazon CloudFront
Block this crawler
robots.txt — disallow Amazon CloudFront:
User-agent: Amazon CloudFront
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} Amazon CloudFront [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "Amazon CloudFront") {
return 403;
}
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