I have a Belkin Connect N150, plugged into a hub, which is plugged on a Speedtouch modem. The hub have many other nodes connected to, possibly with wireless routers too. I only have access to my equipment (the Belkin, and my PC, which is running Windows 7 x64 -- firewall disabled) and the hub.
From time to time, something prevents me from connecting to the Internet. When this happens, I restart the modem, and then everything works again. Sometimes, things get more serious, and I have to also unplug everything from the hub, and then plug them again. Unfortunatelly, from time to time nothing works, and I have to wait until my router gain connectivity again. During this downtime, my PC can't ping the modem.
I just found out that if instead of this setup I just plug my PC on the hub, bypassing the router, everything works fine! Sometimes, if I switch back to the router, then it works, but most of the time it does not. I havew nmap installed on my PC, but don't know what to look for.
I want to know what is happening, not only to fix this problem but also to learn more about these things. Any ideas?