ADSL or PPPoE
From MEPIS Documentation Wiki
Using Ethernet (ADSL or PPPoE), to connect to the internet is relatively easy with Mepis, because when the distribution, begins to run, it tries to detect all the network interfaces in the computer.
So after the whole boot process has finished and you have passed the login screen (where you have entered the apropiate password), you will be looking at your desktop.
To finish setting up your internet connection, you must click: Kmenu > Internet > Connection > ADSL/PPPoE configuration, and follow the different screens, where you will be asked for some ISP information (like your username and password). Complete that section and a few seconds later, you will be surfing the Internet.