Use the root / solokey combination first. Troubleshooting "Access Denied"
If you cannot log in using default credentials, it may be due to one of the following: zmm220 default telnet password
Use the device menu or a network scanner to find the device's IP (often default 192.168.1.201 ). Use the root / solokey combination first
Use a Telnet client (like PuTTY or the Windows Command Prompt). telnet [IP_ADDRESS] Note: Some versions use non-standard ports like 10086 . recover a locked device
default Telnet password , you may be attempting to troubleshoot firmware, recover a locked device, or perform security research. Common Default Telnet Credentials ZKTeco ZMM220