Chapter 43 System
ZyWALL/USG Series User’s Guide
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43.4.1 Pre-defined NTP Time Servers List
When you turn on the ZyWALL/USG for the first time, the date and time start at 2003-01-01
00:00:00. The ZyWALL/USG then attempts to synchronize with one of the following pre-defined list
of Network Time Protocol (NTP) time servers.
The ZyWALL/USG 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 ZyWALL/USG 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 ZyWALL/USG 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.
43.4.2 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 573 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 ZyWALL/USG date and time.
Offset Specify how much the clock changes when daylight saving begins and ends.
Enter a number from 1 to 5.5 (by 0.5 increments).
For example, if you set this field to 3.5, a log occurred at 6 P.M. in local official time will
appear as if it had occurred at 10:30 P.M.
Apply Click Apply to save your changes back to the ZyWALL/USG.
Reset Click Reset to return the screen to its last-saved settings.
Table 346 Configuration > System > Date and Time (continued)
LABEL DESCRIPTION
Table 347 Default Time Servers
0.pool.ntp.org
1.pool.ntp.org
2.pool.ntp.org
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