D-Link DFL-2500 - Manual (Page 82)

3.8. Setting Date and Time
Correctly setting the date and time is important for NetDefendOS to operate properly. Time
scheduled policies, auto-update of the IDP and Anti-Virus databases, and other product features
require that the system clock is accurately set. In addition, log messages are tagged with
time-stamps in order to indicate when a specific event occured. Not only does this assume a working
clock, but also that the clock is correctly synchronized with other devices in the network.
To maintain current date and time, NetDefendOS makes use of a built-in real-time hardware clock.
This clock is also equipped with a battery backup to guard against a temporary loss of power. In
addition, NetDefendOS supports Time Synchronization Protocols in order to automatically adjust
the clock, based on queries sent to special external servers.
3.8.1. General Date and Time Settings
Current Date and Time
The administrator can set the date and time manually and this is recommended when a new
NetDefendOS installation is started for the first time.
Example 3.20. Setting the Current Date and Time
To adjust the current date and time, follow the steps outlined below:
CLI
gw-world:/> time -set YYYY-mm-DD HH:MM:SS
Where YYYY-mm-DD HH:MM:SS is the new date and time. Note that the date order is year, then month and then
day. For example, to set the date and time to 9:25 in the morning on April 27th, 2007 the command would be:
gw-world:/> time -set 2007-04-27 09:25:00
Web Interface
1. Go to System > Date and Time
2. Click Set Date and Time
3. Set year, month, day and time via the dropdown controls
4. Click OK
Note
A new date and time will be applied by NetDefendOS as soon as it is set.
Time Zones
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 D-Link Firewall is physically
located.
3.8. Setting Date and Time Chapter 3. Fundamentals
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