I just got hooked up for Comcast internet service and I'm trying to set up my arris wireless cable modem for secure wifi and such. I tried entering my modem's IP address from the connection details (yes, I have internet connection, but not secure), and I entered 192.168.100.1 for an IP address. I tried in both Internet Explorer and Firefox. All I get is a message that either there's a problem loading the page or the connection timed out. I'm running WinXP.