Time Servers; Setting The Time Zone; Enabling Dst - D-Link DFL-260E User Manual

3.8.3. Time Servers

The world is divided up into a number of time zones with Greenwich Mean Time (GMT) in London
at zero longitude being taken as the base time zone. All other time zones going east and west from
zero longitude are taken as being GMT plus or minus a given integer number of hours. All locations
counted as being inside a given time zone will then have the same local time and this will be one of
the integer offsets from GMT.
The NetDefendOS time zone setting reflects the time zone where the NetDefend Firewall is
physically located.
Example 3.21. Setting the Time Zone
To modify the NetDefendOS time zone to be GMT plus 1 hour, follow the steps outlined below:
Command-Line Interface
gw-world:/> set DateTime Timezone=GMTplus1
Web Interface
1. Go to System > Date and Time
2. Select (GMT+01:00) in the Timezone drop-down list
3. Click OK
Daylight Saving Time
Many regions follow Daylight Saving Time (DST) (or "Summer-time" as it is called in some
countries) and this means clocks are advanced for the summer period. Unfortunately, the principles
regulating DST vary from country to country, and in some cases there can be variations within the
same country. For this reason, NetDefendOS does not automatically know when to adjust for DST.
Instead, this information has to be manually provided if daylight saving time is to be used.
There are two parameters governing daylight saving time; the DST period and the DST offset. The
DST period specifies on what dates daylight saving time starts and ends. The DST offset indicates
the number of minutes to advance the clock during the daylight saving time period.
Example 3.22. Enabling DST
To enable DST, follow the steps outlined below:
Command-Line Interface
gw-world:/> set DateTime DSTEnabled=Yes
Web Interface
1. Go to System/Date and Time
2. Check Enable daylight saving time
3. Click OK
3.8.3. Time Servers
138
Chapter 3. Fundamentals