In the previous sections, we covered how to create and manage frontend IP configurations, listeners, and rules. There are a couple of additional features that can be managed for the application gateway from the Azure portal, PowerShell, and CLI, such as monitoring, WAF, and health probes.
Health probes
By default, the health of all the resources in the backend pool of Azure Application Gateway are monitored. When resources are considered unhealthy, they are automatically removed from the pool. They are monitored continuously and added back to the backend pool when they become available and respond to health probes again.
Azure Application Gateway offers default health probes and custom health probes. When a custom health probe is not created, Azure Application Gateway automatically configures a default health probe. The default health probe will monitor the resources in the backend pool by making an HTTP request to the IP addresses that have been...
