NTP Management

On this screen, you can view and modify the date and time configuration of the SambaBox server.

Date & Time Settings

Timezone & NTP Settings

Local time zone selection is made from the Time Zone drop-down box. Sets the server’s time as the UTC +/- timezone value.

Orphan Mode

Sometimes such as an NTP subnet, local reference clocks, or Internet time servers isolated from all UTC sources. In such cases, subnet servers and clients stay synchronized to a common timescale, not UTC may be required. Previously, this function was used to simulate a UTC source provided by local time driver. A server with this driver can be used to synchronize other host on the subnet directly or indirectly .

Orphan Mode specifies the layer at which time server will switch to Orphan Mode. For example, a time server using a value of 6 will have a tier 1 through 5 will not switch to Orphan Mode as long as the time source is accessible. The recommended value is 2 more than the worst-case externally accessible time source.

Orphan Mod allows a group of ntp servers to automatically choose a leader if all real-time clock sources become unavailable.

Hint

A common configuration for private networks includes one or more core servers running at the lowest layer. It is best practice to configure each of these servers to be a backup for the others, using symmetric or broadcast modes. As long as at least one core server can reach a UTC resource, the entire subnet can be synchronized with it.

Orphan Wait Mode

The delay time in seconds to switch to Orphan Mode. To avoid prematurely activating Orphan Mode, a wait delay occurs when the daemon is first started and all resources are lost after that. The delay is intended to allow time for other resources to become accessible and selectable. Orphan Mode will be activated only when the delay ends without a resource.

NTP Server Settings

Time servers defined on SambaBox are added or removed from this field.

Add NTP Server

The new time server is activated by using the [Save] button after selecting the iburst and/or prefer boxes by entering the network address (IP) or name, which has to be resolved by dns, in the box added to the interface after clicking the [Add Server] button.

Hint

iburst

When the time server is unreachable (trying to find out if a host is reachable) it sends a payload of eight packets and then shortens that time until the first sync. Used for faster clock synchronization. Normally the gap between NTP packets is about 16 seconds to allow the call to complete. After reaching the server, the gap between packets decreases to about 2 seconds.

Hint

prefer

Marks the time server as the preferred server. When conditions are equal, this host will be selected for synchronization among a number of properly functioning hosts. This option can be used with any peer or server, but is most commonly used with a radio clock.

Change NTP Server

The information of the time servers is activated by pressing the [Save] button after the changes to be made in the relevant boxes.

Delete NTP Server

If the [Remove Server] button is pressed, the server information at the end of the list will be removed from the interface, but unless the [Save] button is pressed, the old settings will remain active in the system.

Hint

Load Original Servers

It allows the old settings to be restored, provided that the [Save] button is not pressed after making changes to the time servers.

Query Time

To query time from another existing server, enter the network address or name of the server in the ntp server box and click the [Query Time] button to determine whether the server is a time server.

Manual Time Synchronization

To synchronize the time with another existing server, enter the network address or name of the server in the ntp server box and synchronize the time of the server with the time of the other server with the [Sync Time] button.

Set Manual Time

To set the time manually, a calendar is opened when the box with the date is clicked on.After the desired time information is selected, the server’s time is set to the desired date with the [Set Time and Date] button.