Work with Managed Rulesets
Managed Rulesets are preconfigured rulesets provided by Cloudflare that you can deploy. Only Cloudflare can modify these rulesets.
The rules in a Managed Ruleset have a default configuration. However, you can define overrides that change this default configuration.
There are several Cloudflare products that provide you with Managed Rulesets. Check each product’s documentation for details on the available Managed Rulesets.