Is the physical host connected to the internet using WiFi?
In the case if you want to have your web server and your intranet as a VMs
- Firstly you can create a virtual network on your physical host which is internet facing (gives access to internet) - bridged adapter to the physical (host) NIC (aka adapter) (ethernet / wireless)
- Secondly you can create non-internet facing network which will be your "intranet" network which will not be internet facing.
Then if you want to give your VMs access to the internet and intranet you can add two virtual NICs to each VM.
I hope that helps :)