I have a wireless network that consists of a dual-band router and the modem that Comcast supplied to me. I'm trying to figure out how to access its configuration settings so that I can do things like remotely restart it. How would I go about doing so?
when you say remotely, do you mean from the WAN side? that will not be possible without special ISP software which you will not be able to access. allowing this would let attackers easily perform denial of service attacks on entire subnets with a simple HTTP request.
from the LAN side, this is possible if your modem and ISP configuration allow it. Check this list to determine the IP address of the lan side of the modem: http://www.dslreports.com/faq/7363 most ISPs use 192.168.100.1 and just point a web browser at it.