Ensure your device and computer are on the same subnet. A typical configuration uses static IP settings: device IP 192.168.1.201 and PC IP 192.168.1.1 with subnet mask 255.255.255.0 .
Ensure your PC is on the same subnet as the ZMM220 board (standard default IP is often 192.168.1.201 Terminal Client: Use a client like or the native Windows command prompt. telnet [Device_IP] telnet 192.168.1.201 Enter the credentials provided above. Important Notes Case Sensitivity: Credentials like are strictly lowercase. zmm220 default telnet password
Depending on the specific firmware version, modification by a local distributor, or the manufacturing date, the default password might vary. If the primary credential set does not work, administrators commonly test these variations: root | Password: (Blank / No password) Password: admin Password: zkteco Password: 123456 💻 How to Connect to ZMM220 via Telnet Ensure your device and computer are on the same subnet
If the port is filtered or closed, the manufacturer disabled Telnet in the production firmware. telnet [Device_IP] telnet 192
Ensure your computer can communicate with the terminal over the local network: ping Use code with caution. Step 3: Initiate the Connection Connect to the standard Telnet port (23): telnet 23 Use code with caution. Step 4: Authenticate
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Never expose ZMM220 devices directly to the public internet. Place all time attendance and access control hardware onto a dedicated, isolated Virtual Local Area Network (VLAN). Use strict firewall Access Control Lists (ACLs) to ensure only authorized management servers can communicate with the devices.