Microsoft Azure Security Engineer Associate AZ-500 Practice Question
You deploy an internal load balancer (ILB) App Service Environment (ASE) v3 in the delegated subnet Prod-Ase-Subnet of a virtual network named Prod-VNet. The ASE hosts several internal line-of-business web apps that must be reachable only from your on-premises network over an existing ExpressRoute private peering. You create a Network Security Group (NSG) and associate it with Prod-Ase-Subnet. You must meet the following requirements:
Allow HTTPS traffic (TCP 443) from the on-premises address range 10.30.0.0/16 to the web apps.
Keep the minimum set of inbound rules that are required for the Azure App Service platform to manage the ASE.
Which additional inbound NSG source should you allow to make sure the ASE continues to be managed by the App Service platform while still blocking unsolicited Internet traffic?
Source Any on port 454
Service tag AzureLoadBalancer on ports 80 and 443
Source VirtualNetwork on all ports
Service tag AppServiceManagement on the required management ports
The Azure App Service platform manages an App Service Environment through the AppServiceManagement service tag. When you associate an NSG with the ASE's subnet, you must allow inbound traffic from this service tag; otherwise, scale operations, health monitoring, and TLS certificate sync fail. Because the ASE in this scenario is internal, you can restrict the remaining user traffic to the on-premises CIDR 10.30.0.0/16 on TCP 443. Allowing any Internet source or the AzureLoadBalancer tag is unnecessary and would open the environment more than required.
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Microsoft Azure Security Engineer Associate AZ-500
Secure networking
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