Deployment models for AWS Network Firewall: Transit Gateway attachment and multiple VPC endpoints

This article explores two advanced AWS Network Firewall deployment features that address operational complexity and cost challenges at scale.

• Transit Gateway-attached firewalls eliminate customer-managed inspection VPCs by directly attaching Network Firewall to Transit Gateway as a network function attachment
• Multiple VPC endpoint associations enable a single firewall to protect up to 50 VPC endpoints per AZ, consolidating management while maintaining distributed endpoint architecture
• Transit Gateway-attached firewalls support east-west traffic inspection, centralized internet egress, and combined patterns with simplified administration
• Multiple VPC endpoint associations reduce costs through secondary endpoint pricing and enable cross-account security with centralized policy management
• Key considerations include TLS inspection limitations for multi-endpoint deployments, shared throughput capacity per AZ, and routing constraints
• Comparison table provided to help select between distributed, centralized with inspection VPC, and Transit Gateway-attached firewall models

These capabilities enable organizations to design network security architectures that balance security requirements, operational efficiency, and cost optimization.