Hi, I once had a similar problem with a device at work that I had to access, but no one knew the password. A brute force crack dit the trick. A quick look at the documentation set the username to "ubnt", unless you changed it, it will be all about the password. It's hard to guess how much time it will take, it depends on the complexity of the password and the time each test takes. Usually, I would do a dictionary approach(trying words in a long list) and then a full test all combinations brute force. If you can narrow it down, excluding special chars(*,/,$,...) for example, the complexity is reduced.