Chapter 43 System

Table 230 System > Date and Time (continued)

LABEL

DESCRIPTION

Synchronize Now

Click this button to have the ZyWALL get the time and date from a time server

 

(see the Time Server Address field). This also saves your changes (except the

 

daylight saving settings).

 

 

Time Zone Setup

 

 

 

Time Zone

Choose the time zone of your location. This will set the time difference between

 

your time zone and Greenwich Mean Time (GMT).

 

 

Enable Daylight

Daylight saving is a period from late spring to early fall when many countries set

Saving

their clocks ahead of normal local time by one hour to give more daytime light in

 

the evening.

 

Select this option if you use Daylight Saving Time.

 

 

Start Date

Configure the day and time when Daylight Saving Time starts if you selected

 

Enable Daylight Saving. The at field uses the 24 hour format. Here are a

 

couple of examples:

 

Daylight Saving Time starts in most parts of the United States on the second

 

Sunday of March. Each time zone in the United States starts using Daylight

 

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

 

Second, Sunday, March and type 2 in the at field.

 

Daylight Saving Time starts in the European Union on the last Sunday of March.

 

All of the time zones in the European Union start using Daylight Saving Time at

 

the same moment (1 A.M. GMT or UTC). So in the European Union you would

 

select Last, Sunday, March. 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).

 

 

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 begin configuring this screen afresh.

 

 

43.3.1 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.

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ZyWALL USG 100/200 Series User’s Guide