Private WAN Connectivity to SaaS and PaaS Framework

This white paper outlines a framework for connecting private WAN environments to SaaS and PaaS providers, focusing on the architectural decisions that enterprises face as they transition to cloud services. It details three distinct scenarios for Network Address Translation (NAT) deployment: Customer-Hosted NAT, Verizon-Hosted NAT, and CSP-Hosted PrivateLink. Each scenario is described in terms of its operational model, advantages, and challenges. The paper explains how Customer-Hosted NAT offers maximum control and sovereignty, while Verizon-Hosted NAT provides a flexible, managed service model. CSP-Hosted PrivateLink is highlighted as a newer approach that enhances security by minimizing public exposure. The document emphasizes the importance of understanding the differences between public peering and the public Internet, and the necessity of a robust NAT strategy for effective cloud interconnection. Additionally, it discusses the implications of emerging technologies such as Agentic AI on connectivity options, illustrating the evolving landscape of cloud architecture.