Deep Dive into AWS Network Firewall

AWS Network Firewall is a managed service that makes it easy to deploy essential network protections for all of your Amazon Virtual Private Clouds (VPCs).

Key Features

1. Stateful Inspection: Inspects traffic based on protocols and port, or even regex patterns.
2. VPC Integration: Deploys into your VPCs automatically with a few clicks.
3. Managed Rules: Use AWS managed rule groups for common threats.

Implementation Steps

1. Create Firewall Policy: Define stateless and stateful rule groups.
2. Create Firewall: Associate the policy with a specific VPC and subnets.
3. Update Route Tables: Direct traffic to the firewall endpoint.

Best Practices

• Use a separate inspection VPC for centralized traffic inspection (Transit Gateway architecture).
• Combine with AWS WAF for application-layer protection.