Firmware for this device controls video encoding, network protocols, storage management, motion detection algorithms, and remote access via P2P (DDNS).
Beware of third-party firmware sites. Incorrect files can brick your DVR permanently. Use these verified sources: dhxvr5104hsi3 firmware
Official portal: dahuasecurity.com > Support > Download Center > Product Selector > XVR > XVR5104 Series Firmware for this device controls video encoding, network