Comment 6 for bug 1724441

Hi,
the dependency to libvirt atm is only
-> libvirt-daemon (Depend) -> libvirt-daemon-system (suggest)
And if that would be all that would be needed I'd expect that it could be changed in gnome-boxes.

But I wonder about "whichever libvirt package is responsible for creating that network needs to ensure it bridges to all physical devices by default.".
The default configuration is to have the default network as "nat". Which means the guests can reach out and since the host has a device to the guest network it can reach the guests.
It will give you external network access - if that is all you need, fine - no change in libvirt will be needed.
If you actually meant real "bridged to all physical devices" that is unlikely to be the default as it is a too invasive change to the networking on a package install.
For now I assume you "just" need external network which you will have - with that the libvirt part of this bug is "invalid" as no change is needed - Let me know if I misunderstood this part of the request.