Use rulesets and rule overrides to only enable selected rules

Use a ruleset override and a rule override in a phase entry point ruleset to execute only selected rules in a Managed Ruleset.

Add a rule to a phase entry point ruleset that executes a Managed Ruleset.
Configure a ruleset override that disables all rules in the Managed Ruleset.
Configure a rule override to set an action for the rules you want to execute.

Example: Configure ruleset and rule overrides at the zone level

The following PUT request uses the Update ruleset operation at the zone level to execute only two rules from a Managed Ruleset in the http_request_firewall_managed phase.

In this example:

"id": "<MANAGED_RULESET_ID>" adds a rule to the phase entry point ruleset to execute a Managed Ruleset for requests in the specified zone (<ZONE_ID>).
"enabled": false defines an override at the ruleset level to disable all rules in the Managed Ruleset.
"rules": [{"id": "<RULE_ID_1>", "action": "block", "enabled": true}, {"id": "<RULE_ID_2>", "action": "log", "enabled": true}] defines a list of overrides at the rule level to enable two individual rules.

curl -X PUT \
"https://api.cloudflare.com/client/v4/zones/<ZONE_ID>/rulesets/phases/http_request_firewall_managed/entrypoint" \
-H "Authorization: Bearer <API_TOKEN>" \
-d '{
  "rules": [
    {
      "action": "execute",
      "expression": "true", 
      "action_parameters": {
        "id": "<MANAGED_RULESET_ID>",
        "overrides": {
          "enabled": false,          
          "rules": [
            {
              "id": "<RULE_ID_1>",
              "action": "block",
              "enabled": true
            },
            {
              "id": "<RULE_ID_2>",
              "action": "log",
              "enabled": true              
            }
          ]
        }
      }
    }
  ]
}'

Example: Configure ruleset and rule overrides at the account level

The following PUT request uses the Update ruleset operation at the account level to execute only two rules from a Managed Ruleset in the http_request_firewall_managed phase.

In this example:

"id": "<MANAGED_RULESET_ID>" adds a rule to the phase entry point ruleset to execute a Managed Ruleset for requests addressed to example.com.
"enabled": false defines an override at the ruleset level to disable all rules in the Managed Ruleset.
"rules": [{"id": "<RULE_ID_1>", "action": "block", "enabled": true}, {"id": "<RULE_ID_2>", "action": "log", "enabled": true}] defines a list of overrides at the rule level to enable two individual rules.

curl -X PUT \
"https://api.cloudflare.com/client/v4/accounts/<ACCOUNT_ID>/rulesets/phases/http_request_firewall_managed/entrypoint" \
-H "Authorization: Bearer <API_TOKEN>" \
-d '{
  "rules": [
    {
      "action": "execute",
      "expression": "cf.zone.name eq \"example.com\"", 
      "action_parameters": {
        "id": "<MANAGED_RULESET_ID>",
        "overrides": {
          "enabled": false,
          "rules": [
            {
              "id": "<RULE_ID_1>",
              "action": "block",
              "enabled": true
            },
            {
              "id": "<RULE_ID_2>",
              "action": "log",
              "enabled": true
            }
          ]
        }
      }
    }
  ]
}'