Network configuration

[Achmad_Furqon]

@robb

Maybe my networking skills are too simple, but to be frank I have absolutely no clue what exactly you want to accomplish.
In your drawing I don’t see any way to connect NethServer VM -directly_ to the internet. But still you configure ETH0 as PPPoE, meaning it will get a direct IP from your ISP.
As I see your drawing, your modem and your router connect to 2 (different) internet connections.
IMO, to make this work you should create 2 RED interfaces on your Nethserver VM, 1 connceting to your router and one connecting to your Modem.
Then a GREEN interface on your NethServer VM should connect to your switch. Then from your switch you can connect any other device such as cabled pc’s, Accesspoints, printers etc.,…

As I interpret what you would like to accomplish (2 internet connections and using NethServer as a gateway with multiWAN. You will need at least 3 network interfaces, either physical or virtual.

i want to make mail server&AD with nethserver, so nethserver should be able to access from external… well i could not explain it better. thank you @robb & @mark_nl
but in my term, if my debian & ubuntu server could work well with the topology i share, why nethserver can not. wish me luck