Option "Network" Make "Internet" (red)

NethServer Version: 7.2
I try to make Role "Internet (red) but an error “Cannot delete the last green interface”
I guess it is the "LAN (green)
Any hint?

Create a virtual interface green, then keep it disconnected.

Thank You pike!

I hope I manage to do it ok.

  The site is where You can see the result.

I have not made any index.html file get.

  If I from the local network type only ostvik.info I got this


This web site is under construction

  Is it any page in the NethServer Documentation that I use and

understand more about this issue?

Thanks again!