Simplifying Egress Inspection with AWS Cloud WAN Service Insertion for Greenfield Deployments

This article details how AWS Cloud WAN Service Insertion simplifies internet egress (north-south) traffic inspection across multiple network architectures. The key points are:

• AWS Cloud WAN enables routing internet-bound traffic through security appliances or inspection services
• Three deployment scenarios are explored:
  • Single-Region Egress Inspection
  • Multi-Region Egress Inspection with regional security stacks
  • Multi-Region Egress Inspection with geo-clustering and edge override
• Service Insertion uses Network Function Groups (NFGs) to redirect traffic through security services
• Edge override allows customizing traffic routing between regions
• Recommended to keep egress traffic within the region where resources are deployed

The solution provides flexible, scalable network security inspection across AWS regions, allowing organizations to implement consistent egress traffic filtering and monitoring.