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Why we use CAPTCHAs, (Mon, May 11th)

ID: 74ac8c8a-a2c5-5c6e-b0c1-37206cfde9a5

STIX ID: report--74ac8c8a-a2c5-5c6e-b0c1-37206cfde9a5

Feed Name: SANS ISC Diary

Date Published: 2026-05-11

Date Updated: 2026-05-11

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A site operator reports on implementing Cloudflare Turnstile CAPTCHAs, finding ~99.7% of ~300 requests identified as bots, lists several suspicious IPs/networks seen, describes a fixed false-positive on the login flow, and explains why Turnstile was chosen (privacy, low user impact, ease of implementation).

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