EnableFirewallStorageAccounts

# Get all the storage accounts
$all = Get-AzureRmResource | where-object { $_.ResourceType -like "Microsoft.Storage/storageAccounts" }

# Enable the firewall on all storage accounts and add the IP addresses 1.1.1.1 / changes 1.1.1.1. to your own IP addresses
foreach ($item in $all)
{
  Update-AzureRmStorageAccountNetworkRuleSet -ResourceGroupName $item.ResourceGroupName -AccountName $item.Name -Bypass AzureServices,Metrics,Logging -DefaultAction Deny -IpRule (@{IPAddressOrRange="1.1.1.1";Action="allow"},@{IPAddressOrRange="1.1.1.1";Action="allow"},@{IPAddressOrRange="1.1.1.1";Action="allow"},@{IPAddressOrRange="1.1.1.1";Action="allow"})

}