This started happening about 3 weeks ago. If I disconnect the router and hook the modem straight to a PC, everything is fine. Linksys had RMA'ed the router once, and OptimumOnline has replaced the modem, but the problem persists. The only way I was able to establish a connection was to connect the modem to the PC, write down all the information from IPCONFIG /ALL and then enter it into the router (using static IP instead of DHCP). This is not an acceptable resolution, so I was wondering if anyone was having a similar problem, or had a possible solution. Linksys has already sent me supposedly new firmware (but it still shows up as v 1.10 after loading).