http://www.speakeasy.net/support/dsl/linuxdsl.php

[Sam]

Shouldn't someone update this web page? It's ancient.

Things have become much easier in the last eight years. You don't need to
do this no mo'.

This day and age, with Fedora, it's only a matter of:

Gnome Menu → Desktop → System Settings → Network

Or, if you can't find your way through the gnome menu: right click on the
desktop → "Open Terminal" → type "system-config-network", then:

Highlight eth0, click "Edit", then choose either DHCP or a static IP address
configuration, depending on what DSL package you've signed up for; click
"Ok", then "DNS" tab, and enter your DNS address settings, if necessary.

The existing linuxdsl.php page is a bit silly, but it's a nostalgically
pleasant trip back in time…