Building Zero Trust Access Across Multi-Account AWS Environments

This article explains how to implement AWS Verified Access (AVA) for zero-trust security across multi-account AWS environments, eliminating traditional VPN and bastion host infrastructure.

• Verified Access evaluates each request based on user identity and device health, not network location
• Centralized architecture uses dedicated networking account to manage access for all workload accounts
• AWS RAM shares Verified Access Groups across Organizational Units with consistent Cedar policies
• IAM Identity Center provides centralized identity management across the organization
• Supports both HTTPS web applications and non-HTTPS resources like databases
• Deployment uses CloudFormation templates for central instance and application endpoints
• Testing includes database connectivity via psql client and web application browser access
• Reduces attack surface by eliminating broad network exposure and centralizing policy management

This solution provides unified security visibility and automatic policy inheritance for new accounts while maintaining zero-trust principles across distributed AWS environments.