: Gently wipe the optical fingerprint or face recognition sensor using a dry, lint-free cloth. Avoid using harsh chemicals or abrasive materials.
The most common cause of failed biometric recognition is a physical barrier between the user and the sensor. zkteco authentication failure solution best
: Ensure fingers are neither too dry nor too wet. For facial recognition, ensure the area is well-lit and that there are no obstructions like masks or heavy glare. : Gently wipe the optical fingerprint or face
: If a "COM Key" is set on the device, the same key must be entered into the software settings. A mismatch here will result in an immediate connection failure. 3. Software and Firmware Fixes : Ensure fingers are neither too dry nor too wet
If the "Authentication Failure" occurs while trying to connect the device to management software, it is likely a network handshake issue.
: ZKTeco devices often use default ports like 4370 (TCP) for proprietary protocols, 3718 for SSH, or 23 for Telnet. Ensure these are not blocked by a firewall.