: For older models, try the default username admin with the password admin or leave the password field blank.
A security code will be sent to the reserved email address you linked during the initial setup. dahua password reset by serial number
The serial number (SN) acts as the device’s unique fingerprint. When you request a reset, Dahua’s security algorithm generates a time-sensitive reset code based on that SN and the current timestamp. This prevents a thief from simply pressing a button to bypass the password and stealing your footage. : For older models, try the default username
| Symptom | Solution | | :--- | :--- | | ConfigTool says "Invalid Serial Number" | Triple-check the SN. Do not use letter O if it might be number 0 . | | Support rejects your request | You must prove ownership. Take a photo of the serial sticker next to a handwritten date. | | Reset code doesn't work | The code is time-sensitive (valid for only 60 seconds). Generate a new export file and request a new code. | | Device is offline in ConfigTool | Disable Windows Firewall and ensure the device has a static IP on the same subnet (e.g., 192.168.1.x). | When you request a reset, Dahua’s security algorithm