ive posted another post related to this problem but im asking a very simple q here.
Ive had 3rd party modem and my own router working fine until yesterday. could it be something comcast did on their side? I think when i bought modem I had to tell comcast the MAC address of the modem... i dont think i had to tell them about my router
now the only thing i can do is hardwire different computers (1 at a time) directly to the ethernet port of the modem. this seems to indicate that comcast doesnt care about whats plugged into that port.
is this true? or does comcast have to provision the modem to allow for a router (thats going to do NAT and DHCP) to be connected to it?