storage-files-networking-endpoints-public-restrict-cli.md

title	include file
description	include file
services	storage
author	khdownie
ms.service	azure-file-storage
ms.topic	include
ms.date	6/2/2020
ms.author	kendownie
ms.custom	include file, devx-track-azurecli

To restrict access to the storage account's public endpoint to specific virtual networks using service endpoints, we first need to collect information about the storage account and virtual network. Fill in <storage-account-resource-group>, <storage-account-name>, <vnet-resource-group-name>, <vnet-name>, and <subnet-name> to collect this information.

storageAccountResourceGroupName="<storage-account-resource-group>"
storageAccountName="<storage-account-name>"
restrictToVirtualNetworkResourceGroupName="<vnet-resource-group-name>"
restrictToVirtualNetworkName="<vnet-name>"
subnetName="<subnet-name>"

storageAccount=$(az storage account show \
        --resource-group $storageAccountResourceGroupName \
        --name $storageAccountName \
        --query "id" | \
    tr -d '"')

virtualNetwork=$(az network vnet show \
        --resource-group $restrictToVirtualNetworkResourceGroupName \
        --name $restrictToVirtualNetworkName \
        --query "id" | \
    tr -d '"')

subnet=$(az network vnet subnet show \
        --resource-group $restrictToVirtualNetworkResourceGroupName \
        --vnet-name $restrictToVirtualNetworkName \
        --name $subnetName \
        --query "id" | \
    tr -d '"')

In order for traffic from the virtual network to be allowed by the Azure network fabric to get to the storage account public endpoint, the virtual network's subnet must have the Microsoft.Storage service endpoint exposed. The following CLI commands will add the Microsoft.Storage service endpoint to the subnet if it's not already there.

serviceEndpoints=$(az network vnet subnet show \
        --resource-group $restrictToVirtualNetworkResourceGroupName \
        --vnet-name $restrictToVirtualNetworkName \
        --name $subnetName \
        --query "serviceEndpoints[].service" \
        --output tsv)

foundStorageServiceEndpoint=false
for serviceEndpoint in $serviceEndpoints
do
    if [ $serviceEndpoint = "Microsoft.Storage" ]
    then
        foundStorageServiceEndpoint=true
    fi
done

if [ $foundStorageServiceEndpoint = false ] 
then
    serviceEndpointList=""

    for serviceEndpoint in $serviceEndpoints
    do
        serviceEndpointList+=$serviceEndpoint
        serviceEndpointList+=" "
    done
    
    serviceEndpointList+="Microsoft.Storage"

    az network vnet subnet update \
            --ids $subnet \
            --service-endpoints $serviceEndpointList \
            --output none
fi

The final step in restricting traffic to the storage account is to create a networking rule and add to the storage account's network rule set.

az storage account network-rule add \
        --resource-group $storageAccountResourceGroupName \
        --account-name $storageAccountName \
        --subnet $subnet \
        --output none

az storage account update \
        --resource-group $storageAccountResourceGroupName \
        --name $storageAccountName \
        --bypass "AzureServices" \
        --default-action "Deny" \
        --output none