I have finally given up on setting up internet connection on Mandrake 10.1 Official after a dozen fresh installations and many attempts to set up things on each installation. I have AT&T DSL modem hooked into eth0. At one point I was able to connect to AT&T Worldnet at commandline by using /usr/sbin/adsl-setup utility, but could not be online through any web browser. Now even this utility and pppd are gone in my last 3-4 installations. They are not there in /usr/sbin directory or anywhere else. I have no clue what happened. When these utilities were present, I also tried a setup from this website:
http://www.wurd.com/instcon_linux.php
But it did not work either. Strangely, it probably also messed up my DSL modem, because when I tried to connect to internet through XP I got an error. So I had to call AT&T technical support and they told me to power the modem off and then on. It worked then. How is it possible for some application/configuration in Linux to break any hardware (DSL modem in this case) for Windows' use also?
Anyway, I have to decided to throw away my Mandrake 10.1 Official DVD and try some other distro. I will greatly appreciate your suggestion. Thanks.