I made the mistake of changing the "access for all LAN connected devices" switch in the Advanced/System Tools/Administration control panel without thinking through all the ramifications (and setting up mac addresses for devices I wanted to have access. Needless to say you can't access the router's GUI after you do that.

I did a hard reset and then loaded a backup config file so I'm operational again.

In case anyone else (or me again) makes this mistake does anyone know of a way to access the Router's configuration other than through the GUI and reset that function?