You need to select a time zone in the Manager if you have any Firewall or QoS rules that involve a time-based rule object. The time-based rule objects are Finite Time Period, Recurring Time Period, and Recurring Time Period Group. Time-based rules are implemented using the local time zone of the corresponding Sensor. By default, the time on the Sensor is set to the Greenwich time zone (GMT +00:00).
The Manager displays the alerts generated with respect to the time zone configured for the Manager. For example, consider the Sensor to be in the GMT-08 time zone, and the Manager in the GMT+5:30 time zone. An alert is generated from the Sensor at 11 AM (in the GMT-08 time zone), the Manager displays the time of the alert as 12:30 AM (in the GMT+5:30 time zone). A time based rule has to be configured based on the Sensor time zone, but the alert generated is displayed with reference to the time zone configured for the Manager.
You can configure the time zone at an domain level or at a device level. The time zone at the admin domain, by default, applies to:
All the corresponding child admin domains.
All the Sensors in this domain. This includes any interfaces delegated to other domains.
All the Sensors in the corresponding child admin domains.
If required, you can override the time zone at a child admin domain level and also at each Sensor level.
Important
When you delegate Sensor ports to a child admin domain level, for those ports only the Sensor's time zone will apply and not the child admin domain's time zone.
When you select a time zone, Sensors interpret the time-based rule objects based on the selected time zone. They also factor in daylight savings time, if applicable.
To configure the time zone for an admin domain:
Click the Devices tab.
Select the domain from the Domain drop-down list.
Select Global → Common Device Settings → Time Zone.
To configure the time zone for a Sensor:
Click the Devices tab.
Select the domain from the Domain drop-down list.
On the left pane, click the Devices tab.
Select the device from the Device drop-down list.
Select Setup → Time Zone.
Deselect Inherit Settings? to override the settings of the parent domain.
Select a time zone from the Current Time Zone drop-down.
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Click Save.
Perform a configuration update to the relevant Sensors.
The selected time zone is applied to those Sensors.