Introduction
As cloud applications scale, simple subnet-level filtering isn't enough to defend against sophisticated attack vectors. This project demonstrates how to implement a centralized network security strategy in Microsoft Azure by deploying Azure Firewall to protect corporate workloads (app-vnet). Moving beyond basic port restrictions, this guide covers how to design and enforce Firewall Policies,including Layer 7 Application Rules to securely lock down egress traffic to Azure DevOps pipelines (dev.azure.com) and Network Rules to safeguard core infrastructure traffic like DNS resolution.
Scenario
Your organization requires centralized network security for the application virtual network. As the application usage increases, more granular application-level filtering and advanced threat protection will be needed. Also, it is expected the application will need continuous updates from Azure DevOps pipelines. You identify these requirements.
Azure Firewall is required for additional security in the app-vnet.
