ACFP 示例：针对被泄漏凭证的自定义响应

默认情况下，规则组 AWSManagedRulesACFPRuleSet 执行的凭证检查通过标记请求并阻止请求来处理被泄露的凭证。有关规则组和规则行为的详细信息，请参阅 AWS WAF 欺诈控制账户创建欺诈预防（ACFP）规则组。

要通知用户其提供的账户凭证已被泄漏，您可以执行以下操作：

以下 Web ACL 列表显示了前一个示例中的 ACFP 托管规则组，其中的 SignalCredentialCompromised 规则操作被覆盖为计数。使用此配置，当此规则组评估任何使用已泄露凭证的 Web 请求时，它将标记该请求，但不会阻止该请求。

此外，Web ACL 现在有一个名为 aws-waf-credential-compromised 的自定义响应和一个名为 AccountSignupCompromisedCredentialsHandling 的新规则。规则优先级是比规则组更高的数值设置，因此在 Web ACL 评估中，它在规则组之后运行。新规则将任何带有规则组已泄露凭证标签的请求进行匹配。当规则找到匹配项时，它会使用自定义响应正文将 Block 操作应用于请求。自定义响应正文向最终用户提供其凭证已被泄露的信息，并建议应对操作。

{
  "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,
  "RetrofittedByFirewallManager": 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}"
    }
  }
}