Creating a VNet with a subnet

To get started, we will need a VNet with a subnet created. You need a subnet because NSGs are applied on the subnet level. To create a VNet with a subnet, you can use the following Azure CLI or PowerShell commands.

You can use the following commands in the CLI (see the Creating and configuring VNet-to-VNet connection section for reference):

$ az network vnet create -g myResourceGroup -n vnetName
$ az network vnet subnet create -g myResourceGroup --vnet-name vnetName -n subnetName --address-prefixes 10.0.0.0/16

Alternatively, you can use the following commands in PowerShell. They use the same parameters as the Azure CLI command—the only difference is the syntax:

$vnet = New-AzVirtualNetwork -AddressPrefix 10.0.0.0/16 -Location location -Name vnetName -ResourceGroupName myResourceGroup
Add-AzVirtualNetworkSubnetConfig -AddressPrefix 10.0.0.0/16 -Name subnetname-VirtualNetwork $vnet

Remember that you are not allowed to create a network security...