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ZyWALL 5/35/70 Series User’s Guide
485 Chapter 31 Maintenance
31.5 Pre-defined NTP Time Servers List
When you turn on the ZyWALL for the first time, the date and time start at 2000-01-01
00:00:00. The ZyWALL then attempts to synchronize with one of the following pre-defined
list of NTP time servers.
The ZyWALL 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.
Note: The ZyWALL can use this pre-defined list of time servers regardless of the
Time Protocol you select.
Table 175 Default Time Servers
ntp1.cs.wisc.edu
ntp1.gbg.netnod.se
ntp2.cs.wisc.edu
tock.usno.navy.mil
ntp3.cs.wisc.edu
ntp.cs.strath.ac.uk
ntp1.sp.se
time1.stupi.se
tick.stdtime.gov.tw
tock.stdtime.gov.tw
time.stdtime.gov.tw
When the ZyWALL 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 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.
31.5.1 Resetting the Time
The ZyWALL resets the time in the following instances:
• When you click Synchronize Now.
• On saving your changes.
• When the ZyWALL starts up.
• 24-hour intervals after starting.
31.5.2 Time Server Synchronization
Click the Synchronize Now button to get the time and date from the predefined time server or
the time server you specified in the Time Server Address field.