AWS IoT Device Defender Documentation

AWS IoT Device Defender is a fully managed service that helps you audit and monitor devices connected to AWS IoT. The service is designed to assess the cloud configuration of your IoT device fleet, provide ongoing monitoring of device activities via rule-based and ML-based Detect capabilities, trigger an alarm when an audit violation or behavior anomaly is identified, and enable you to address issues quickly with built-in mitigation actions.

Key Features

AWS IoT Device Defender is designed to audit your device-related resources (such as X.509 certificates, IoT policies, and Client IDs) against AWS IoT security best practices (for example, the principle of least privilege or unique identity per device). AWS IoT Device Defender is designed to report configurations that are out of compliance with AWS IoT security best practices, such as multiple devices using the same identity, or overly permissive policies that can allow one device to read and update data for many other devices.
Rules Detect
AWS IoT Device Defender is designed to detect unusual device behaviors that may be indicative of a compromise by monitoring certain high-value security metrics from the device and AWS IoT Core (e.g., the number of listening TCP ports on your devices or authorization failure counts). You can specify normal device behavior for a group of devices by setting up behaviors (rules) for these metrics. AWS IoT Device Defender is designed to monitor and evaluate each datapoint reported for these metrics against user-defined behavior (rules) and to alert you if an anomaly is detected.
ML Detect
AWS IoT Device Defender is designed to monitor and identify anomalous datapoints for certain cloud-side metrics (e.g., authorization failure counts, message sent counts) and certain device-side metrics (e.g., packets out, listening TCP port counts) with machine learning (ML) models and to trigger an alarm if an anomaly is detected. AWS IoT Device Defender helps alleviate the need for you to define accurate behaviors of your devices because it is designed to set such behaviors with ML models using your device data from a designated trailing period of time. The service is also designed to retrain the models each day (as long as it has sufficient amount of data to retrain on) to refresh the expected device behaviors based on the latest designated trailing period of time. ML Detect makes getting started with monitoring easy.
Mitigation actions
AWS IoT Device Defender is designed to enable you to use built-in mitigation actions to perform steps on Audit and Detect alarms such as adding things to a thing group, replacing default policy version and updating device certificate.
AWS IoT Device Defender is designed to publish alarms to the AWS IoT console, AWS IoT Device Defender API, Amazon CloudWatch, and Amazon SNS if you configured SNS topics to receive Device Defender alarms.
Metrics Integration

With AWS IoT Device Defender ListMetricValues API, you can visualize device-side, cloud-side and custom metrics from connected devices through an open API and integrate these metrics into any of your custom dashboards to get an overview of your deployments.

Additional Information

For additional information about service controls, security features and functionalities, including, as applicable, information about storing, retrieving, modifying, restricting, and deleting data, please see This additional information does not form part of the Documentation for purposes of the AWS Customer Agreement available at, or other agreement between you and AWS governing your use of AWS’s services.