Looking for User Mikrotik Hotspot (MikroTik).

Attempting to log in with an incorrect user 11111, returns an error message:

user <11111> not found

The same happens with the user noadmin:

But when trying with the admin user, the error message changes to:

Invalid username or password

Which means that that user if there is:

The user exists but the password is incorrect

From here you can develop a tool that only brute force attack the password.

And with a bit of scanning you can detect the web administration console:

How to fix the error:

• Changing portal captive Mikrotik hotspot
  There is a small detail in this.

Observations:

When programming, it is necessary to know the type of message so as not to expose the operation or internal part of the system.