For some reason my Mac has been having problems keeping the right IP address every since around the time I either restored my IMac or around the time of a bad storm. I'm not sure which or even if that is relevant. I have replaced my cable modem not once but three times with still the same problem. I do not believe it is a connection problem at all. The online cable light never goes off and my charter cable telephone service remains online as well. Here are the issues: For some reason my IMac keeps reverting to a 169 IP address which is obviously not right. I do not have any routers, hubs, or wireless. Simply just the cable modem with the ethernet connection. When I have this problem and try to go on the internet it says I have no connection and the up and down sync lights on the cable modem remain off. Also, I can fix this by simply rebooting the modem and going through the networks diagnostics. However, this is extremely irritating as I am a stock market trader and do not need to loose my IP address during trading hours. What do you think is causing this and how can I fix it??????? Thanks!!!!!!