Q-See QT528 - Manual (Page 43)

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4.91 Reset
Note: Before you do the reset, we recommend you do an Import/Export first to
save all of your settings (see instructions below). After the reset you will then be
able to restore all of your settings.
Reset all settings the device will reboot.
4.9.2 Import/Export
User can export the data files into PC as backup function, and then import specified data files from PC to device.
4.9.3 Block/Allow list
Fig 4-44 Block/Allow list
Here authorized user can prohibit computer users within a certain IP address segment from accessing the DVR
or admitting computer users within a certain IP address segment into the DVR. For example, if authorized user
doesn’t want computer users within IP addresses from 196.168.000.002 to 196.168.000.004 to access the DVR,
authorized user can checkmark Block list, and then input this IP address range. After that, click Apply to save
settings. If authorized users want computer users within a certain IP address range, they can checkmark Allow
list, and then do the same operation.