If you don't need it daily, use SSH (if supported) or keep Telnet turned off.
In recent firmware updates, the default password is often or randomized based on the device’s serial number. If solars does not work, it usually indicates one of three things: The Telnet service is disabled by default in the UI. zmm220 default telnet password updated
The password has been hashed or changed to a manufacturer-specific string. If you don't need it daily, use SSH
Understanding the ZMM220 Default Telnet Password The is a widely used core board in biometric attendance and access control terminals (often found in ZKTeco devices). For system administrators and developers, gaining terminal access via Telnet is essential for troubleshooting, data management, or custom integration. The password has been hashed or changed to
In older firmware versions, the most common login combination was: root Password: solars or zkem_p 2. The "Updated" Reality
If you are locked out of your device's terminal, follow these steps to regain access: Check the Web Management Interface