Introduction to Azure Application Gateway

Module 7 · Introduction to Azure Application Gateway

MS Learn: Introduction to Azure Application Gateway · learn.azure.intro-to-azure-application-gateway Module note for Path MOC

Overview

Azure Application Gateway is the Layer-7 (HTTP/HTTPS) load balancer: URL/host-based routing, SSL/TLS termination, cookie session affinity, and optional WAF (web application firewall). Where Load Balancer forwards raw TCP/UDP, Application Gateway routes web content.

Learning objectives (from Microsoft Learn)

In this module, you’ll:

• Learn what Azure Application Gateway is and the functionality it provides.
• Determine whether Application Gateway meets the needs of your organization.

Units

1. Introduction
2. What is Azure Application Gateway?
3. How Azure Application Gateway works
4. When to use Azure Application Gateway
5. Knowledge check
6. Summary

Concepts introduced

• Application Gateway — L7 with SSL offload, path/host routing, WAF.
• (Contrast) Load Balancer — L4, no content awareness.
• VNet / subnet — gateway deploys into a dedicated subnet.

Key terms & commands (Azure CLI)

az network application-gateway create -g <rg> -n appgw     --sku Standard_v2 --capacity 2 --vnet-name <vnet>     --subnet snet-appgw --priority 100

Hands-on

• Deploy an App Gateway into a dedicated subnet, define a listener + backend pool + HTTP health probe.
• Add a path-based routing rule (/api/ vs /) and note the behavior.
• Enable the WAF SKU and observe managed rule set.

Exam focus

• L7 vs L4 distinction with Load Balancer.
• SSL termination and cookie session affinity are App GW strengths.
• URL-path / multi-site routing; needs its own subnet.
• WAF_v2 protects web apps (OWASP rules).

Related

Path MOC · application-gateway · intro-to-azure-load-balancer · vnet · subnet