What is the difference between GuardDuty, Inspector, and Security Hub?
AWS · Advanced level
Answer
GuardDuty detects suspicious activity, Inspector finds vulnerabilities in workloads and images, and Security Hub aggregates findings and posture checks. Together they support detection, vulnerability management, and centralized prioritization.
Technical explanation
Security Hub is a findings aggregator and posture tool; it does not replace GuardDuty or Inspector.
Multi-account governance should combine preventive controls such as SCPs with detective controls such as Config, GuardDuty, Inspector, Security Hub, CloudTrail, and Access Analyzer.
Central security, logging, and networking accounts reduce blast radius and protect evidence from workload account compromise.
Every control needs an owner, exception process, alert route, and remediation workflow or it becomes shelfware.
Hands-on example
1. Create a multi-account sandbox or use separate dev/security/logging accounts to test the control pattern.
2. Enable the relevant organization-level service or guardrail, then generate a controlled finding or denied action.
3. Route findings to Security Hub, EventBridge, ticketing, SIEM, or an incident channel with ownership metadata.
4. Document the exception process, remediation automation, and evidence required for audit.
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