Ether Ape installation
EtherApe works pretty well in VirtualBox. Here's one way of getting it to automatically start and filter traffic.
Install Ubuntu.
Get it to auto-login by changing the login settings.
Download EtherApe from the Ubuntu applications list.
Download wmctrl from the Ubuntu applications list.
Create the following script (replace password with your password):
sleep 60
echo password | sudo -S etherape &
sleep 30
wmctrl -r EtherApe -b add,maximized_vert,maximized_horz
Add your hosts to the /etc/hosts file (e.g. Alpha, Bravo, Charlie, Delta).
Add the following EtherApe filter:
ip and (ip src host Alpha or Bravo or Charlie or Delta) and (ip src dst Alpha or Bravo or Charlie or Delta)