welcome to the forum!
Since you have not given too much information, it is a bit hard to figure out where your problem is. I am using a DSL PPPoE line as well. In the "authentication" part I am using the user name, password and "PAP or CHAP". However required parameters might depend on your ISP.
raj_l_nik hat geschrieben:
Do i need to add firmware for my modem
This should depend on your modem, but usually modems using a LAN should work without, where modems with USB might need a firmware (but not all).
So if you want to get more help, please provide your ISP and country, modem type, and whatever specific information that might help. Did you have a look to the system log, e.g. "IPCop" part? Please post relevant logs.