Assignment 3: NTP service

NTP server

Finally, install and configure a local system clock synchronization service or network time service (time).

1. Installation: (1)

   • ntpsec

2. Configuration:

   • NTP “servers ”:

     • ntp1.net.berkeley.edu

     • ntp2.net.berkeley.edu

   • Besides:

     • Your NTP service should generate stats and store them in the directory /var/log/ntpsec

       1. loopstats peerstats clockstats

     • Your NTP service should provide “time” in broadcast mode to the network 10.128.0.0/24.

3. Checking:

   • Check that when the service starts, the host time and date (software) are updated.

   • Using ntpd utils, check the list of peers used by ntpd server.

     • ¿What's happening?

4. Re-configuration:

   • Modify the ntpsec configuration to use these NTP "pools" instead of servers:

     • 0.us.pool.ntp.org

     • 1.us.pool.ntp.org

     • 2.us.pool.ntp.org

   • Using ntpd utils again, check the list of peers used by ntpd server.

     • ¿What's the diferent between "server" and "pool"?

More details in references [6]

NTP client

Check that the client VMs links correctly with NTP service on server-01:

The frontend VM should synchronize its software clock automatically in relation to server-01 every so often (you decide this interval). You can use ntpdate-debian or systemd-timesyncd as NTP client.

(1) Use the official debian software repositories