Digital Video Recorder User Manual
151
DVR is connected to a public network, you should use a NTP server that has a time synchronization function, such
as the server at the National Time Center (IP Address: 210.72.145.44). If the DVR is set in a more customized
network, NTP software can be used to establish a NTP server used for time synchronization.
12.2.5 Configuring NAT
Purpose:
Universal Plug and Play (UPnP™) can permit the device seamlessly discover the presence of other network
devices on the network and establish functional network services for data sharing, communications, etc. You can
use the UPnP™ function to enable the fast connection of the device to the WAN via a router without port mapping.
Before you start:
If you want to enable the UPnP™ function of the device, you must enable the UPnP™ function of the router to
which your device is connected. When the network working mode of the device is set as multi-address, the Default
Route of the device should be in the same network segment as that of the LAN IP address of the router.
Steps:
1. Enter the Network Settings interface.
Menu > Configuration > Network
2. Select the NAT tab to enter the UPnP™ Settings interface.
Figure 12. 14 UPnP™ Settings Interface
3. Check Enable UPnP checkbox to enable UPnP™.
4. Select the Mapping Type as Manual or Auto in the drop-down list.
OPTION 1: Auto
If you select Auto, the Port Mapping items are read-only, and the external ports are set by the router
automatically.
1) Click Apply button to save the settings.
2) You can click Refresh button to get the latest status of the port mapping.
Figure 12. 15 UPnP™ Settings Finished-Auto
OPTION 2: Manual
If you select Manual as the mapping type, you can edit the external port on your demand by clicking to
activate the External Port Settings dialog box.
Steps:
1) Click to activate the External Port Settings dialog box. Configure the external port No. for server
port, http port and RTSP port respectively.
You can use the default port No., or change it according to actual requirements.
External Port indicates the port No. for port mapping in the router.
The value of the RTSP port No. should be 554 or between 1024 and 65535, while the value of the
other ports should be between 1 and 65535 and the value must be different from each other. If
multiple devices are configured for the UPnP™ settings under the same router, the value of the port
No. for each device should be unique.
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