You have an Azure environment that contains 10 virtual networks and 100 virtual machines. You need to limit the amount of inbound traffic to all the Azure virtual networks. What should you create?
Both NSG and Firewall can perform this function. I believe the key is in the number of virtual networks involved. You will use an NSG for a single VN and a Firewall for multiple.
Yes! NSGs need to be created 10 times for all 10 VNets. Firewall can be applied to a resource group, etc. etc. AT ONCE, selecting all of them together. Imagine you had 1,000 VNets as well !
D is the answer.
https://learn.microsoft.com/en-us/azure/firewall/overview
Azure Firewall is a cloud-native and intelligent network firewall security service that provides the best of breed threat protection for your cloud workloads running in Azure. It's a fully stateful, firewall as a service with built-in high availability and unrestricted cloud scalability. It provides both east-west and north-south traffic inspection.
An Azure firewall is a feature in Azure that allows you to control inbound and outbound network traffic to and from Azure resources. You can create rules that specify the ports, protocols, and sources that can be used to access your virtual networks and virtual machines, and you can apply the firewall to all the virtual networks in your environment.
It allows you to create network filtering rules at the network level which can limit the traffic to the entire virtual network, not just to a single virtual machine.
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