Cloud Custodian, also known as c7n, is a rules engine for managing public cloud accounts and resources. It allows users to define policies to enable a well-managed cloud infrastructure, that's both secure and cost-optimized. It consolidates many of the adhoc scripts organizations have into a lightweight and flexible tool, with unified metrics and reporting. Custodian can be used to manage AWS, Azure, and GCP environments by ensuring real-time compliance to security policies (like encryption and access requirements), tag policies, and cost management via garbage collection of unused resources and off-hours resource management. Custodian also supports running policies on infrastructure as code assets to provide feedback directly on developer workstations or within CI pipelines. Custodian policies are written in simple YAML configuration files that enable users to specify policies on a resource type (EC2, ASG, Redshift, CosmosDB, PubSub Topic) and are constructed from a vocabulary of filters and actions. It integrates with the cloud-native serverless capabilities of each provider to provide for real-time enforcement of policies with built-in provisioning.
FEATURES
ALTERNATIVES
Lists AWS resources using the AWS Cloud Control API and writes them to a JSON output file.
Comprehensive cybersecurity tool for Microsoft Azure providing CSPM & CWPP capabilities.
Azucar is a multi-threaded plugin-based tool for assessing Azure Cloud security.
Managed Kubernetes Inspection Tool leveraging FOSS tools to query and validate security-related settings.
Tool for analyzing cloud resources against best practices and generating reports.
A tool to find S3 buckets from HTML, JS, and bucket misconfiguration testing
An open-sourced framework for managing resources across hundreds of AWS Accounts
PINNED

Mandos Brief Newsletter
A weekly newsletter providing cybersecurity leadership insights, industry updates, and strategic guidance for security professionals advancing to management positions.

PTJunior
An AI-powered penetration testing platform that autonomously discovers, exploits, and documents vulnerabilities while generating NIST-compliant reports.

CTIChef.com Detection Feeds
A tiered cyber threat intelligence service providing detection rules from public repositories with varying levels of analysis, processing, and guidance for security teams.

ImmuniWeb® Discovery
ImmuniWeb Discovery is an attack surface management platform that continuously monitors an organization's external digital assets for security vulnerabilities, misconfigurations, and threats across domains, applications, cloud resources, and the dark web.

Checkmarx SCA
A software composition analysis tool that identifies vulnerabilities, malicious code, and license risks in open source dependencies throughout the software development lifecycle.

Orca Security
A cloud-native application protection platform that provides agentless security monitoring, vulnerability management, and compliance capabilities across multi-cloud environments.

DryRun
A GitHub application that performs automated security code reviews by analyzing contextual security aspects of code changes during pull requests.