Ok, I think I'm onto something now thanks to your help. I found online which ports Comcast blocks, and doesn't seem to include the ones I'm using. However, I do have a box from Vonage that's in front of the router which does have its own firewall and is acting as DHCP server. I spent some time last night trying to reconfigure Vonage's box - firewall off, etc. Then tried to connect to LinkStation through my neighbor's connection (has come in handy when I need to check connection outside of home network); but still doesn't seem to work. My next attempt will be to move the Vonage box behind the Belkin router, give it a static IP, disable firewall, do port forwarding for it, etc. Hopefully I don't completely botch my phone service AND INternet! I'm above my paygrade here, but feel like I'm onto something finally!