If your device is using factory defaults, try these common combinations: (Admin account, local access only) (User account, restricted authority) (Hidden user for system use) How to Reset a Forgotten Password
The historical default username and password for Dahua DVRs (Digital Video Recorders) and NVRs (Network Video Recorders) is (no password, or password admin depending on firmware version). However, as of approximately 2019-2020, Dahua has largely eliminated universal default passwords. Newer devices now require a user-defined, strong password during the initial setup wizard. dahua dvr default password
Possible reasons: