Time synchronization service (NTP)¶

Introduction to NTP¶

Zentyal integrates ntpd [2] as its NTP server. NTP uses UDP port 123.

Configuring an NTP server with Zentyal¶

Zentyal uses the NTP server both synchronize its own clock and to offer this service on the network, so it is important to enable it.

After enabling the module, in System ‣ Date/time you can enable NTP synchronization and then select from what servers you want to synchronize. It is usually recommended to synchronize against the server repository in the NTP project [3] which are already preset in Zentyal, but you can change the settings to synchronize against a local NTP server you have installed or any other of our choice.

Date and time settings

Once Zentyal is synchronized, you can offer your time clock using the NTP service. As always, we must not forget to check the firewall rules, as NTP is usually enabled only for internal networks.