The DD-WRT is custom, Linux-based firmware available for many mainstream routers. You can hotflash DD-WRT to your router to open up additional capabilities of the router that you did not have access to before. You can set the DD-WRT firmware to schedule a reboot at regular intervals. Regularly rebooting your router is useful because, like with the memory on a computer, certain data will stay lodged in the router's memory until a reset and can slow the unit down.
Log in to the DD-WRT router. Open a browser and enter your router's IP address, by default this is "192.168.1.1" unless you have changed this. Enter the username and password you have set to log in.
Click "Keep Alive." Click "Enable" next to "Schedule Reboot."
Choose either the "Interval" or the "Set time" you want to reboot.
Click "Save" and then "Apply Changes."