ACFP 範例：對遭到入侵認證的自訂回應

根據預設，規則群組執行的認證檢查會透過標記要求並封鎖要求來AWSManagedRulesACFPRuleSet處理遭到入侵的認證。如需有關規則群組和規則行為的詳細資訊，請參閱AWS WAF 欺詐控制帳戶創建欺詐預防（ACFP）規則組。

要通知用戶他們提供的帳戶憑據已被洩露，您可以執行以下操作：

• 將SignalCredentialCompromised規則覆寫為 Count — 這會導致規則僅計算相符請求並加上標籤。

• 使用自訂處理新增標籤比對規則 — 設定此規則以符合 ACFP 標籤並執行您的自訂處理。

下列 Web ACL 清單顯示先前範例中的 ACFP 管理規則群組，而SignalCredentialCompromised規則動作會覆寫為計數。使用此配置時，當此規則組評估任何使用受損憑據的 Web 請求時，它將標記該請求，但不會阻止它。

此外，Web ACL 現在具有名為的自訂回應aws-waf-credential-compromised和名為的新規則AccountSignupCompromisedCredentialsHandling。規則優先順序的數值設定高於規則群組，因此它會在 Web ACL 評估中的規則群組之後執行。新規則會符合具有規則群組遭入侵認證標籤的任何要求。當規則找到相符項目時，會將Block動作套用至具有自訂回應主體的要求。自訂回應主體會向使用者提供其認證已遭入侵的資訊，並提出要採取的動作。

{
  "Name": "compromisedCreds",
  "Id": "... ",
  "ARN": "arn:aws:wafv2:us-east-1:111122223333:regional/webacl/compromisedCreds/...",
  "DefaultAction": {
    "Allow": {}
  },
  "Description": "",
  "Rules": [
    {
      "Name": "AWS-AWSManagedRulesACFPRuleSet",
      "Priority": 0,
      "Statement": {
        "ManagedRuleGroupStatement": {
          "VendorName": "AWS",
          "Name": "AWSManagedRulesACFPRuleSet",
          "ManagedRuleGroupConfigs": [
            {
              "AWSManagedRulesACFPRuleSet": {
                "CreationPath": "/web/signup/submit-registration",
                "RegistrationPagePath": "/web/signup/registration",
                "RequestInspection": {
                  "PayloadType": "JSON",
                  "UsernameField": {
                    "Identifier": "/form/username"
                  },
                  "PasswordField": {
                    "Identifier": "/form/password"
                  },
                  "EmailField": {
                    "Identifier": "/form/email"
                  },
                  "PhoneNumberFields": [
                    {
                      "Identifier": "/form/country-code"
                    },
                    {
                      "Identifier": "/form/region-code"
                    },
                    {
                      "Identifier": "/form/phonenumber"
                    }
                  ],
                  "AddressFields": [
                    {
                      "Identifier": "/form/name"
                    },
                    {
                      "Identifier": "/form/street-address"
                    },
                    {
                      "Identifier": "/form/city"
                    },
                    {
                      "Identifier": "/form/state"
                    },
                    {
                      "Identifier": "/form/zipcode"
                    }
                  ]
                },
                "EnableRegexInPath": false
              }
            }
          ],
          "RuleActionOverrides": [
            {
              "Name": "SignalCredentialCompromised",
              "ActionToUse": {
                "Count": {}
              }
            }
          ]
        }
      },
      "OverrideAction": {
        "None": {}
      },
      "VisibilityConfig": {
        "SampledRequestsEnabled": true,
        "CloudWatchMetricsEnabled": true,
        "MetricName": "AWS-AWSManagedRulesACFPRuleSet"
      }
    },
    {
      "Name": "AccountSignupCompromisedCredentialsHandling",
      "Priority": 1,
      "Statement": {
        "LabelMatchStatement": {
          "Scope": "LABEL",
          "Key": "awswaf:managed:aws:acfp:signal:credential_compromised"
        }
      },
      "Action": {
        "Block": {
          "CustomResponse": {
            "ResponseCode": 406,
            "CustomResponseBodyKey": "aws-waf-credential-compromised",
            "ResponseHeaders": [
              {
                "Name": "aws-waf-credential-compromised",
                "Value": "true"
              }
            ]
          }
        }
      },
      "VisibilityConfig": {
        "SampledRequestsEnabled": true,
        "CloudWatchMetricsEnabled": true,
        "MetricName": "AccountSignupCompromisedCredentialsHandling"
      }
    }
  ],
  "VisibilityConfig": {
    "SampledRequestsEnabled": true,
    "CloudWatchMetricsEnabled": true,
    "MetricName": "compromisedCreds"
  },
  "Capacity": 51,
  "ManagedByFirewallManager": false,
  "LabelNamespace": "awswaf:111122223333:webacl:compromisedCreds:",
  "CustomResponseBodies": {
    "aws-waf-credential-compromised": {
      "ContentType": "APPLICATION_JSON",
      "Content": "{\n  \"credentials-compromised\": \"The credentials you provided have been found in a compromised credentials database.\\n\\nTry again with a different username, password pair.\"\n}"
    }
  }
}