a network has a pppoe VPN connection and after i searched how to enable it ,i reached the command pppoeconf , when i used it , it showed me for enabling and disabling the vpn via command : sudo pon dsl-provider and for disabling it : sudo poff , but i lost my regular connection after i disable it.
as you can see my LAN icon is kind of lost and i don't know anything in detail about networking in Debian or in General either.
i do have internet when i enable the pppoe connection , i will lost it when i disable it.
here is the detail of my machine:
