Application Gateway Network Isolation Short #education #azure

Key Concepts:

• App Gateway Network Isolation
• Optional Public IP
• Control Plane Traffic
• Network Control Restrictions
• Outbound Internet Communication
• Virtual Network DNS Configuration
• New vs. Existing Deployments

App Gateway Network Isolation: Overview

The video focuses on a new network isolation option for Azure Application Gateway (App Gateway). This feature introduces significant changes to how App Gateways are deployed and managed, particularly concerning public IP addresses and network control.

Optional Public IP and Control Plane Traffic

The primary benefit of enabling the network isolation switch is that the public IP address becomes completely optional for new App Gateway deployments. This is because the control plane traffic for Azure now takes a separate route, distinct from the public endpoint used for client traffic. Previously, the control plane relied on the public endpoint for communication.

Relaxed Network Control Restrictions

The new network isolation feature removes several previous restrictions related to network control. Specifically:

• No need to allow control plane communication: If a public endpoint is configured, it's no longer necessary to explicitly allow communication from the Azure control plane.
• Block outbound internet communication: It's now possible to block all outbound internet communications from the App Gateway.
• Override default internet route: The App Gateway can be configured to override the default internet route and instead use the virtual network's DNS configuration.

Impact on Existing Deployments

It's crucial to note that this network isolation feature only affects new App Gateway deployments created after the switch is enabled. Existing App Gateway deployments will continue to operate using the original architecture, where the control plane traffic shares the same endpoint as the client traffic.

Conclusion

The new network isolation option for Azure App Gateway offers enhanced security and flexibility by making the public IP optional and relaxing network control restrictions. However, it's essential to understand that these changes only apply to new deployments created after enabling the feature. Existing deployments will remain unaffected.