Hard reset D-Link DIR-457

Factory reset (Hard reset) First open the back cover of your DIR-457 router. The reset pin hole is around the middle, next to the MicroSD card slot – check the picture above. Press the reset ‘hole’ button with a sharp object (paperclip) and hold for 5 seconds until the device restarts.
Firmware Firmware link
Default username admin
Default password [leave blank]
Default IP address