Chapter 45 System

 

Table 210 Configuration > System > Date and Time (continued)

 

LABEL

DESCRIPTION

 

End Date

Configure the day and time when Daylight Saving Time ends if you

 

 

selected Enable Daylight Saving. The at field uses the 24 hour

 

 

format. Here are a couple of examples:

 

 

Daylight Saving Time ends in the United States on the first Sunday of

 

 

November. Each time zone in the United States stops using Daylight

 

 

Saving Time at 2 A.M. local time. So in the United States you would

 

 

select First, Sunday, November and type 2 in the at field.

 

 

Daylight Saving Time ends in the European Union on the last Sunday

 

 

of October. All of the time zones in the European Union stop using

 

 

Daylight Saving Time at the same moment (1 A.M. GMT or UTC). So in

 

 

the European Union you would select Last, Sunday, October. The

 

 

time you type in the at field depends on your time zone. In Germany

 

 

for instance, you would type 2 because Germany's time zone is one

 

 

hour ahead of GMT or UTC (GMT+1).

 

 

 

 

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.

 

 

 

 

Reset

Click Reset to return the screen to its last-saved settings.

 

 

 

45.3.1 Pre-defined NTP Time Servers List

When you turn on the ZyWALL for the first time, the date and time start at 2003- 01-01 00:00:00. The ZyWALL then attempts to synchronize with one of the following pre-defined list of Network Time Protocol (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.

Table 211 Default Time Servers

0.pool.ntp.org

1.pool.ntp.org

2.pool.ntp.org

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.

 

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ZyWALL USG 50 User’s Guide