I've had the same setup for two years. All of a sudden last week no connectivity. I plugged directly into the back of the modem and things are fine. I figured my linksys router had issues. I replaced it with a Netgear configed it, everything is running hot straight and normal then a few days later the same thing no connectivity via a router but a direct connection works fine. Has Comcast changed something, do I need to config the modem as a bridge, do I need to replace the modem, it's 3+ years old? ...