implementing-zero-trust-network-access

# Implementing Zero Trust Network Access ## When to Use - When replacing traditional VPN-based remote access with identity-based access controls - When implementing micro-segmentation to limit lateral movement within cloud networks - When compliance or security strategy requires zero trust architecture adoption - When providing secure access to cloud workloads without exposing them to the public internet - When building context-aware access policies based on user identity, device health, and location **Do not use** as a complete replacement for network security controls (ZTNA complements but does not replace firewalls and network ACLs), for protecting internet-facing public applications (use WAF), or for IoT device access where identity-based authentication is not feasible. ## Prerequisites - Identity provider (Entra ID, Okta, Google Workspace) with MFA enforcement - Cloud-native networking capabilities (AWS PrivateLink, Azure Private Link, GCP IAP) - Device management solution (Intune, Jamf, CrowdStrike) for device posture assessment - Service mesh or zero trust proxy (Cloudflare Access, Zscaler ZPA, or cloud-native IAP) - Centralized logging for access decisions and policy enforcement ## Workflow ### Step 1: Deploy GCP Identity-Aware Proxy (IAP) for Application Access Configure IAP to provide authenticated access to web applications without VPN. ```bash # Enable IAP API gcloud services enable iap.googleapis.com # Configure OAuth consent screen gcloud iap oauth-bra...