User's Manual Part 2

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2. Leaving the IP address field at "0.0.0.0" makes the device
remotely accessible to all the PCs on Internet or other external
networks; populating it with a specific IP address, say,
218.88.93.33, makes the device only remotely accessible to the
PC at the specified IP address.
8.6 Time
This page is used to set the router’s system time. You can choose to
set the time manually or get the GMT time from the Internet and
the system will automatically connect to NTP server to
synchronize the time.
Note:
Configured time and date info will be lost when the device gets
disconnected from power supply. However, it will be updated
automatically when the device reconnects to Internet. To
activate time-based features (e.g. firewall), the time and date
info shall be set correctly first, either manually or automatically.