nat_rule.tf

resource "azurerm_lb_nat_rule" "winrm_nat" {
  location = "${var.azure_region_fullname}"
  resource_group_name = "${azurerm_resource_group.resource_group.name}"
  loadbalancer_id = "${azurerm_lb.load_balancer.id}"
  name = "WinRM-HTTPS-vm-${count.index}"
  protocol = "Tcp"
  frontend_port = "${count.index + 10000}"
  backend_port = "${var.vm_winrm_port}"
  frontend_ip_configuration_name = "${var.vm_name_prefix}-ipconfig"
  count = "${var.vm_count}"
}