For a Gui try going to the systems menu & use the internet configuration wizard & pick xDSL. From the command line, as root, you can use the command "adsl-setup". You will be taken through either one step by step after launching them. I use adsl-setup when trying to creating a non-X-server firewall (still a work in progress

) & it works fine. You also have to have the program rp-pppoe installed to do either though, before I forget

.