You need to enter a new password.
Two ways to do it. The first time that you enter trought the GUI browser you will be prompted to enter a password.
O go to config prompt (config #).
When you get the config prompt, type “login”
Now you are on “config login#)
Type password (xxxxx)
Replace xxxx with your new password.
Type exit twice, until you are on Config# again.
on the config prompt, type “submit”
your new password will be ready.
There is no back door, do not forget your password.