I think think I know the answer to this already..    The last of my DIR-655 has started experiencing problems.. well actually it no longer communicate
I can ping it but I can't access it  It seems to be performing most of its functions well with exception of port 80  but i can not access it from it intra net  or from the internet
naturally this is on a remote machine
i seem to remember that there is no command line or ssh way to deal with this  right  just a physical reset