~$ az vm open-port --port 80 --resource-group MeineRG --name MeineVM
{
  "defaultSecurityRules": [
    {
      "access": "Allow",
      "description": "Allow inbound traffic from all VMs in VNET",
      "destinationAddressPrefix": "VirtualNetwork",
      "destinationAddressPrefixes": [],
      "destinationApplicationSecurityGroups": null,
      "destinationPortRange": "*",
      "destinationPortRanges": [],
      "direction": "Inbound",
      "etag": "W/\"3f97fd10-69f2-49dc-8eea-4c958ccaa478\"",
      "id": "/subscriptions/54c6f7b7-3c3f-4068-a1b8-51bddf711d33/
          resourceGroups/MeineRG/providers/Microsoft.Network/
          networkSecurityGroups/MeineVMNSG/defaultSecurityRules/
          AllowVnetInBound",
      "name": "AllowVnetInBound",
      "priority": 65000,
      "protocol": "*",
      "provisioningState": "Succeeded",
      "resourceGroup": "MeineRG",
      "sourceAddressPrefix": "VirtualNetwork",
      "sourceAddressPrefixes": [],
      "sourceApplicationSecurityGroups": null,
      "sourcePortRange": "*",
      "sourcePortRanges": [],
      "type": "Microsoft.Network/networkSecurityGroups/defaultSecurityRules"
    },
