Taken from the manual: "If you have forgotten the password, press the “Forgot Password” button shown in Figure 4A. This will bring up the screen shown in Figure 4. This screen will ask for the WatchDog board’s “MAC Address”. This sequence of numbers and letters (all capitals) can be found on a sticker located on the top of the WatchDog board.  Once the password has been reset, you may log in with the default password, which is simply default (all lower case), but immediately go to the setup menu and change the default password to something of your choice. Please record and place the new password information in a safe place."