Off Does not verify IP addresses

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An interactive challenge , inviting the user to click on a specific button.
A non-interactive challenge, JS Challenge (recommended by Cloudflare itself). In this case, no interaction is required from the user, but rather a JavaScript processing by their browser. The user will simply have to wait until the website accepts their request.
What are Cloudflare's security levels?
Below is an overview of Cloudflare's security levels:

Security level Description
Essentially off Only challenge IP all pakistan mobile number list addresses with the worst reputation
Low Challenge only the most threatening visitors
Medium Challenge both moderately threatening visitors and more threatening visitors
High Challenge all visitors who exhibit suspicious behavior in the last 14 days
Under Attack! Only to be used if the website is subject to a DDoS attack

By choosing a low security level for your DNS Zone , only high-scoring IP addresses, i.e. those with the worst reputation, will be checked. With a medium-high security level , even low-scoring IPs (which may have exhibited suspicious behavior) will be checked. Activating the highest mode, “ Under attack! ”, is instead recommended only if anomalous traffic is detected, a symptom of a possible DDoS attack in progress. By applying this level, visitors will see an interstitial page for about 5 seconds, during which Cloudflare will analyze the traffic to ensure that they are legitimate visitors.