- Basic information
The easiest of them all is getting it done in openSUSE. The package needed is kinternet; so ensure that you have it installed during initial setup [It is not selected by default in the installer]. In YaST, configure the ethernet interface, which most likely would be eth0. Use static address 192.168.1.2 and subnet mask 255.255.255.0. Configure the gateway 192.168.1.1. The DNS is obtained from the ISP. Clicking the kinternet icon in the tray should get you connected.
Gentoo lets users configure their kernels. Make sure your kernel meets the requirements mentioned in the Basics section. I prefer using Roaring Penguin PPPoE scripts. Install them during your installation. To configure before first use, issue the following command as root.
eth0="eth0 192.168.1.2 netmask 255.255.255.0 broadcast 192.168.1.255"
To start and stop the connection, use the commands pppoe-start and pppoe-stop. In case, you can connect yet can't view web pages then set the obtained IP address for the pppoe interface as your DNS server. You may also need to specify the default gateway in rc.conf as 192.168.1.1.
Debian also uses Roaring Penguin scripts. Configure as mentioned for Gentoo and Debian shall connect automatically.
Arch uses the same scripts. However, you will have to issue the commands as in Gentoo.