Pre-Defined Ntp Time Servers List; Time Server Synchronization - ZyXEL Communications USG40 User Manual

33.4.1 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.
Table 267 Default Time Servers
0.pool.ntp.org
1.pool.ntp.org
2.pool.ntp.org
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.

33.4.2 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 413 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.
Click System > Date/Time.
1
Select Manual under Time and Date Setup.
2
Enter the ZyWALL/USG's time in the New Time field.
3
Enter the ZyWALL/USG's date in the New Date field.
4
Under Time Zone Setup, select your Time Zone from the list.
5
As an option you can select the Enable Daylight Saving check box to adjust the ZyWALL/USG
6
clock for daylight savings.
Chapter 33 System
ZyWALL/USG Series User's Guide
611