I'm not familiar with Fedora so I don't know if the command pppoeconf
is available in there, but you can try the command pppoeconf
(run as an user with root privileges) in a terminal.
To see if the command exists, run
wim@desktop1:~$ which pppoeconf
use of ppoeconf only applies if the modem is directly connected to the PC using a network cable ! If your setup is different, you must let us know.