Virtual Box with multiple Nics failed to locate the NAT network

_This issue was originally opened by @bax99 as hashicorp/packer#10379. It was migrated here as a result of the [Packer plugin split](https://github.com/hashicorp/packer/issues/8610#issuecomment-770034737). The original body of the issue is below._

Hi there,

When installing Kali Linux 2004 with preseed.cfg and having packer configured with only the NAT network interface on VirtualBox, everything is fine.

However, in my case, I need 3 network interfaces to be configured. But with more than one interface, the packer build gets stuck on "Waiting for SSH to become available". If I open the GUI Virtual Machine and log on, I only see 1 Network Interfaces available under Kali Linux, even if three are configured in the json file.

**part of the Json file**

```json
"builders": [
{
"type": "virtualbox-iso",
"boot_command": [
"",
"/install.amd/vmlinuz",
" auto",
" console-setup/ask_detect=false",
" console-setup/layoutcode=us",
" console-setup/modelcode=pc105",
" debconf/frontend=noninteractive",
" debian-installer=en_US",
" fb=false",
" initrd=/install.amd/initrd.gz",
" kbd-chooser/method=us",
" console-keymaps-at/keymap=fr-ch",
" keyboard-configuration/xkb-keymap=fr-ch",
" keyboard-configuration/layout=Swiss french",
" keyboard-configuration/variant=Swiss french",
" locale=fr_CH",
" netcfg/get_domain=hevs",
" netcfg/get_hostname=kali",
" grub-installer/bootdev=/dev/sda",
" noapic",
" interface=enp0s3",
" preseed/url=http://{{ .HTTPIP }}:{{ .HTTPPort }}/preseed.cfg auto=true priority=critical",
" -- ",
""
],
"boot_wait": "10s",
"disk_size": "{{user `disk_size`}}",
"hard_drive_interface": "sata",
"iso_interface": "sata",
"guest_additions_path": "VBoxGuestAdditions_{{.Version}}.iso",
"virtualbox_version_file": ".vbox_version",
"guest_os_type": "Debian_64",
"headless": "{{ user `headless` }}",
"http_directory": "{{user `http_directory`}}",
"iso_checksum": "{{user `iso_checksum`}}",
"iso_url": "{{user `iso_url`}}",
"memory": "{{ user `memory` }}",
"vboxmanage": [
["storagectl", "{{.Name}}", "--name", "IDE Controller", "--remove"],
["modifyvm", "{{.Name}}", "--vrde", "off"],
["modifyvm", "{{.Name}}", "--graphicscontroller", "vmsvga"],
["modifyvm", "{{.Name}}", "--vram", "128"],
["modifyvm", "{{.Name}}", "--accelerate3d", "off"],
["modifyvm", "{{.Name}}", "--usb", "on"],
["modifyvm", "{{.Name}}", "--mouse", "usbtablet"],
["modifyvm", "{{.Name}}", "--audio", "none"],
["modifyvm", "{{.Name}}", "--nictype1", "82540EM"],
["modifyvm", "{{.Name}}", "--nictype2", "82540EM"],
["modifyvm", "{{.Name}}", "--nictype3", "82540EM"],
["modifyvm", "{{.Name}}", "--nictype4", "82540EM"],
["modifyvm", "{{.Name}}", "--clipboard", "bidirectional"],
["modifyvm", "{{.Name}}", "--draganddrop", "bidirectional"],
["modifyvm", "{{.Name}}", "--nic1", "nat"],
["modifyvm", "{{.Name}}", "--natnet1", "default"],
["modifyvm", "{{.Name}}", "--nic2", "intnet"],
["modifyvm", "{{.Name}}", "--intnet1", "intnet"],
["modifyvm", "{{.Name}}", "--nic3", "natnetwork"]
],
"cpus": "{{ user `cpus` }}",
"ssh_username": "adminhevs",
"ssh_password": "************",
"ssh_port": 22,
"ssh_wait_timeout": "10000s",
"shutdown_command": "echo 'vagrant'|sudo -S shutdown -P now",
"vm_name": "{{ user `template` }}"
}
],
"post-processors": [
{
"type": "vagrant",
"output": "builds/{{user `box_basename`}}.{{.Provider}}.box"
}
],

```

**Kali nics output**

```
2: eth0: mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 08:00:27:b2:a1:ae brd ff:ff:ff:ff:ff:ff

3: eth1: mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 08:00:27:98:9c:82 brd ff:ff:ff:ff:ff:ff

4: eth2: mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 08:00:27:b9:8c:a3 brd ff:ff:ff:ff:ff:ff
inet 10.0.2.35/24 brd 10.0.2.255 scope global dynamic noprefixroute eth2
```

As shown, eth0 did not get any IP from nat, neither eth1 from intnet. I can set manually IPs with nmcli, but it is not what I expect.

How can we have multiple NICS in the json file and be sure the first one will be taken into account by packer?

Regards