To me as well. I got home the other day and was picking up my email. I was watching the modem and looking at all the activity going on. I checked my task list for runaway processes (found none) and then reset the modem.

when it came back, same thing. Finally I pulled the wire from my PC and the cable light was blinking like crazy. I guess I was getting pinged and hit a lot. Fortunately I have the best firewall - a turned off machine.