My router is running the stock 1.21 firmware and it has been fine for almost a year before the wireless suddenly stopped working. I reset the router and restored my previous configuration. After the reboot, the SSID is visible and I can connect to it but there is no internet connection. Also the router becomes unresponsive, i.e. timeout trying to access the router configuration page. After trying out different settings it seems that enabling WPA2+AES is the cause.
In the mean time, I am running an open wireless network and everything seems fine. Is the hardware faulty? I am reluctant to update the firmware because of a negative experience with another router (same model).
Edit: Forgot to mention WISH and Wifi Protect Setup is disabled, happens with both G only and Mixed N + G