i have tried every solution, it works when i plug it directly into the router using a ethernet cable, but on wireless i get the same old dump MTU error and i cant play any online games. Please help, i have a linksys WRT160N router with the latest firmware.
things i have tried: changed MTU amounts to auto, 1500, 1364, 1400, and 1500 - no luck same error
open ports - nothing happens
i narrowed it down to my routers configuration/hardware or my Xbox 360 wireless "N" adaptor.