Azure Networking Cookbook

Creating an internal load balancer

Microsoft Azure supports two types of load balancers—internal and external. An internal load balancer is assigned a private IP address (from the address range of subnets in VNet) for a frontend IP address, and it targets private IP addresses of our services (usually, Azure VM) in the backend. An internal load balancer is usually used by services that are not internet-facing and are accessed only from within our VNet.