Chapter 44 System
ZyWALL USG Series User’s Guide
911
44.4.1 Pre-defined NTP Time Servers List
When you turn on the Zyxel Device for the first time, the date and time start at 2003-01-01 00:00:00. The
Zyxel Device then attempts to synchronize with one of the following pre-defined list of Network Time
Protocol (NTP) time servers.
The Zyxel Device continues to use the following pre-defined list of NTP time servers if you do not specify a
time server or it cannot synchronize with the time server you specified.
When the Zyxel Device uses the pre-defined list of NTP time servers, it randomly selects one server and
tries to synchronize with it. If the synchronization fails, then the Zyxel Device goes through the rest of the
list in order from the first one tried until either it is successful or all the pre-defined NTP time servers have
been tried.
44.4.2 Time Server Synchronization
Click the Synchronize Now button to get the time and date from the time server you specified in the
Time Server Address field.
When the Please Wait... screen appears, you may have to wait up to one minute.
Figure 636 Synchronization in Process
The Current Time and Current Date fields will display the appropriate settings if the synchronization is
successful.
If the synchronization was not successful, a log displays in the View Log screen. Try re-configuring the
Date/Time screen.
To manually set the Zyxel Device date and time.
1 Click System > Date/Time.
2 Select Manual under Time and Date Setup.
3 Enter the Zyxel Device’s time in the New Time field.
Apply Click Apply to save your changes back to the Zyxel Device.
Reset Click Reset to return the screen to its last-saved settings.
Table 364 Configuration > System > Date and Time (continued)
LABEL DESCRIPTION
Table 365 Default Time Servers
0.pool.ntp.org
1.pool.ntp.org
2.pool.ntp.org
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