Gateway Load Balancer
Gateway Load Balancer is an AWS service that provides a managed, scalable solution for deploying, scaling, and managing third-party virtual appliances, such as firewalls, intrusion detection systems, and deep packet inspection tools, in the cloud. It operates at the network layer (Layer 3) and integrates with AWS Transit Gateway to simplify traffic routing and security appliance management across VPCs and on-premises networks. This service offloads the operational overhead of managing appliance fleets, ensuring high availability and automatic scaling based on traffic demands.
Developers should use Gateway Load Balancer when building secure, multi-VPC architectures in AWS that require consistent deployment of network security appliances, such as for compliance, threat detection, or data filtering. It is ideal for scenarios like centralized security inspection across hybrid cloud environments, where traffic must pass through virtual appliances before reaching applications, reducing complexity and improving scalability compared to manual appliance management. This is particularly useful in regulated industries or large-scale deployments where network security is critical.