I own an HP ProBook 4520s laptop which is dual-booted with Windows 8 Pro and Ubuntu 12.04 LTS. I use a wired PPPoE internet connection, which works fine in Windows. But for the last few days I can't use it in Ubuntu. When I start the connection from terminal it doesn't show any errors, but I can't load any webpages in Firefox. Using the 'plog' command, I get the following messages at the end:
Remote message: Login incorrect PAP authentication failed Connection terminated
My Ethernet connection works fine in both Windows and Ubuntu. Can anyone please help me figure out what the problem is?