I talked with comcast yesterday about this - I wanted them to assign the NAS web interface to port 9001 and the comcast tech told me that the modem is wide open - it's passing everthing, including, I assume, gas?!!! And, since the router has a fixed ip, does dhcp matter at this point???
The gateway ip was assigned by comcast. The linksys router's ip is .145, as previously noted.