I had a clean netbook directly connected to the modem with no other machines connected physically. Wireless was off. The gateway was 192.168.0.1, my netbook's ip was 192.168.0.2. There were two other addresses 192.168.0.101, and 192.31.80.30. I do not know where they come from. It was not from any of the family's machines, because they were not connected (wireless was off). My netbook is clean, and it had never been connected to their network until I visited. We are monitoring the IPCop box remotely, and there are still attempts by 192.168.0.101 to connect to an address (the attempts are recorded by IPCop's intrusion detection module and blocked.)