Cable Modem and DSL - help!

[Randy Rathbun]

A while back someone mentioned they had hooked up a cable modem to a linux box.
A friend of mine is having trouble getting his box to play with his, so I
figured I would ask here if someone has a link to any info I might be able to
pass on to him. 

Also, if anyone has any info on hooking up to DSL, please pass that along also.
I am getting DSL installed 2/16 at my house and want things to be smooth. 

Thanks in advance!

Randy