got comcast the other day, the internet works when i plug my mac directly into the cable modem, but not when i plug my Airport Express into it.
I do not have a static external, i plug my mac in and when i check built-in ethernet tcp/ip settings, i see my external Comcast address/subnet/gateway. is it supposed to be that way? if i hit up 192.168.100.1 i can actually get to the cable modem interface, even though my subnet is not 192.168.100.1. shouldn't the comcast cable modem be doing NAT?
if i configure my AE to get the internet via DHCP, it never connects. If i change it to manual, and type in the external info, when i plug the cable in, i get the green "connected' light, but cannot get out to the internet. anyway, i called comcast a few times, but they keep telling me things are working the way they should. anyone with comcast? does this sound right?