Comment by sparkling

8 years ago

$ dig example.com

to get the A Record, then

$ whois 1.2.3.4|grep Cloudflare

Not 100% reliable, but should do the Job.

4 comments

sparkling

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neuland  8 years ago 

    whois $(dig +short yoursitehere.com) | grep -i 'Cloudflare' 1>/dev/null; if [[ $? -eq 1 ]]; then echo 'Didnt find CloudFlare'; else echo 'Found CloudFlare'; fi

Not at a terminal now, but this long one-liner should work.

Like you said, not 100% reliable though. For example, I'm pretty sure Reddit uses CloudFlare, but their whois mentions Fastly, which is a competitor.