I have been using my WAG54G for months now and it has been fine. However, over the last few days I have been experiencing a problem but I am not sure whether the router is at fault or not. After being on the internet a little while suddenly I will start getting "connection refused blah.blah.blah:80" on every site I visit. Occasionally it will correct itself but it normally takes a router reboot. Is this a router problem, firewall, OS etc....?