Virtualbox - fifth adapter?

Question

Computer networks

You can specify up to four adapters in the virtualbox settings. I am now setting up a test system on virtualbox and it became necessary to bridge five network cards inside. So far I've managed to get around this by simply using USB-to-Ethernet as one of the cards, but this is somehow crooked. Is it possible to somehow set the fifth network adapter in virtualbox? Googling hasn't yielded any results yet.

Answer 1

A VirtualBox virtual machine can have up to eight network adapters. For some reason, only four can be added via the GUI. Four more can be added using a command line utility, something like this (all in one line):
VBoxManage modifyvm vm --nic5 hostonly --nictype5 virtio --cableconnected5 on --hostonlyadapter5 "VirtualBox Host-Only Ethernet Adapter" --nic6 hostonly --nictype6 virtio --cableconnected6 on --hostonlyadapter6 "VirtualBox Host-Only Ethernet Adapter" --nic7 hostonly --nictype7 virtio --cableconnected7 on --hostonlyadapter7 "VirtualBox Host-Only Ethernet Adapter" --nic8 hostonly --nictype8 virtio --cableconnected8 on --hostonlyadapter8 "VirtualBox Host-Only Ethernet Adapter"
Where "VirtualBox Host-Only Ethernet Adapter" is the name of the interface on the host machine (in Windows they are so long called).

Answer 2

The question has not been studied, but it seems that this limitation is built-in (and it is not enough to correct the constant in the sources), what about other virtual machines? kvm?
I can advise a simple solution - run another virtual machine exclusively for organizing a bridge, set one of the networks of this machine (and your first one) as an internal network.

Answer 3

and if you bridge the interfaces between each other on the host machine and transfer one interface inside? something for the program, maybe we will find more solutions