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How to tell if your site is served via CloudFlare | Igor’s Blog

Posted by jpluimers on 2018/08/10

Based on [Archive.isHow to tell if your site is served via CloudFlare | Igor’s Blog, I’ve changed the script a little bit.

I’ve tested it with one of the domains from the Cloudbleed list (a pretty OK indication the site is using cloudflare) and a the site that does not:

# curl -sI | grep "Server\|__cfduid\|CF-RAY"
Set-Cookie: __cfduid=d779ee6e244349cf06e2707771a9185e21492589239; expires=Thu, 19-Apr-18 08:07:19 GMT; path=/;; HttpOnly
Server: cloudflare-nginx
CF-RAY: 351e5e9af8971497-AMS
# curl -sI | grep "Server\|__cfduid\|CF-RAY"
Server: ECS (ewr/15BD)

Domain Source: pirate/sites-using-cloudflare: Archived list of domains using Cloudflare DNS at the time of the CloudBleed announcement


via: [WayBack] – Joe C. Hecht – Google+


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