One breach can cost billions. One outage can cost the quarter. One bot army can drain your inventory before you've finished your coffee. Cloudflare blocks the attacks before they reach your code — every layer, every request, every day.
DDoS attacks don't ask permission. They show up in volume, at any layer, at any hour. Cloudflare's network absorbs them automatically — no rules to write, no pages to wake up to. Your origin keeps serving real users while the attack hits a wall it can't break.
Deterministic patterns — regex, string & structural matches — authored by Cloudflare and OWASP.
New signatures ship within hours of a CVE — the network is patched while teams are still triaging.
Your expressions, your thresholds. Combine request fields (geo, path, headers) with Cloudflare-computed ML signals like the WAF Attack Score.
An ML model scores every request 1–99 based on how attack-shaped it looks — catching zero-days and disguised payloads that signatures miss.
You decide where to draw the line and what action to take.
Count by anything: cookie, API key, JA3/JA4 fingerprint, ASN, JSON fields. Each key gets its own budget.
Count only what matters — 4xx-only for credential stuffing, or complexity-based so a GraphQL bomb costs more than a static asset.
Scans response bodies (text, HTML, JSON, XML up to 1 MB) for PII, financial data, and secrets leaving your origin — including responses from cache and Workers.
Detection runs off the response path — zero added latency. Action is always log (the response has already been sent), so you get full visibility into what slipped through your code.
APIs run your revenue: checkout, login, payments, partner integrations, mobile apps. They're also the shortest path to your data — machine-readable, often undocumented, and rarely covered by the same controls as your website. API Shield protects the surface your business actually runs on: it discovers every endpoint you have, validates every request that comes in, and stops sensitive data from leaking out — without a single change to your code.
30–50% of internet traffic is automated. Cloudflare scores every request 1–99 across heuristics, machine learning, and behavioral signals — so you stop scrapers, credential-stuffers, and inventory-hoarders without breaking real users. Score in, action out.
cf.bot_management.score — feed it into WAF rules, rate limits, transform rules, security events
One breach. One outage. One wave. The cost is real — and it shows up on the board's agenda. Cloudflare runs every layer of defense at the edge so the next attack stays a non-event, not a headline.