Azure gives you an option to upgrade the gateway to the Web Application Firewall tier. When you select the Upgrade to WAF Tier checkbox, the Azure portal reveals a few extra options (see Figure 4).

Microsoft has announced that the Web Application Firewall (WAF) bot protection feature has reached general availability on Azure on Application Gateway starting this week.

Microsoft's is now offering a Web Application Firewall (WAF) with its Azure Application Gateway and HTTP load-balancing service to protect apps from a growing spate of malicious attacks.