The problem is, the installer changed the default password years ago, left no documentation, and has since gone out of business. You are locked out of your own security system.
Enter the IP address and Port (usually 4370 for biometrics, 5000 for access panels). zkteco password reset tool
A: Most ZKTeco biometrics ship with Admin Password: 12345 or 0000 . For access controllers, it is often 0 . The problem is, the installer changed the default