The router thing was easy easy. I wonder why I can't make a network connection work with just the cable modem itself connected to the Amiga?
Because of DHCP.. Originally, the only stack I could get to work with my cable modem was MiamiDX. After a while, I even started having problems with that. (Like they're changing DHCP or something.) You can tell there are variations in DHCP implementation just from the linux clients.. Some have worked for me, others not.