ZyXEL Communications 70 Series User Manual

ZyWALL 5/35/70 Series User’s Guide

489 

Chapter 31 Maintenance

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.

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.

The ZyWALL resets the time in the following instances:

• When you click 

.

• On saving your changes. 
• When the ZyWALL starts up.
• 24-hour intervals after starting.

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. 

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