Maybe try http://www.linux.org/docs/ldp/howto/Modem-HOWTO.html . Or search around over here maybe: http://www.justlinux.com/forum/index.php I'm not too familiar with Mandrake. If you want to do it from scratch the hard way maybe try http://hints.linuxfromscratch.org/hints/ppp-hint.txt . I'm assuming you're using PPP?