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To reset a Dahua password using the serial number, you must obtain a temporary security code by emailing the number to Dahua support or your authorized distributor.

5. Step-by-Step Example: Reset via Serial + ConfigTool

This example uses Dahua ConfigTool (official free utility) and the built-in “reset by serial” function (available in newer firmware).

  • Set a strong password (8+ characters, mixed case, numbers, symbols).
  • Enable multi-level security (e.g., HTTPS, IP filtering).
  • Store the password in a secure password manager.
  • Register a current, active email in the device settings for future recovery.

Before you can start the reset, you need the unique identifier for your hardware. You can find the Dahua serial number in a few ways:

. This method is often used for older models or as a backup when newer methods like QR code scanning are not configured. Method 1: Emailing Dahua Support (Serial Number Method)

Note the exact date: Turn on your recorder and write down the exact system date displayed on the monitor screen.

Troubleshooting

| Issue | Solution | |-------|----------| | No email received | Check spam folder; ensure the email matches exactly the one on file. | | ConfigTool cannot find device | Disable firewall, use same subnet, or connect directly via crossover cable. | | Reset file import fails | Verify serial number; ensure reset file is not expired (usually 1 hour validity). | | Device locked after multiple attempts | Wait 30 minutes or power cycle the device. |

Physical Label: Check the sticker on the underside or rear of your DVR, NVR, or camera.