NTP synchronizing always in local
I have an Ubuntu 16.04 with the following NTP configuration:
driftfile /var/lib/ntp/drift
restrict -4 default kod nomodify notrap nopeer noquery
restrict -6 default kod nomodify notrap nopeer noquery
restrict 127.0.0.1 nomodify notrap
restrict 10.0.200.15 mask 255.255.255.0 nomodify notrap
server 127.127.1.0
fudge 127.127.1.0 stratum 10
server 0.ntp.pool.org iburst prefer minpoll 4 maxpoll 7
server 1.ntp.pool.org iburst prefer minpoll 4 maxpoll 7
server 2.ntp.pool.org iburst prefer minpoll 4 maxpoll 7
tinker panic 0
restrict 127.0.0.1
restrict -6 ::1
But it is always synchronizing with localhost (I think it is because the lower stratum value):
remote refid st t when poll reach delay offset jitter
==============================================================================
127.127.1.0 .LOCL. 10 l 16h 64 0 0.000 0.000 0.000
64.99.80.121 .STEP. 16 u - 128 0 0.000 0.000 0.000
However I want it to synchronize with the external NTP ntp.pool.org
I have added the ubuntu ntp server to the ntp.conf file:
server ntp.ubuntu.com iburst prefer minpoll 4 maxpoll 7
And now I see that it has a stratum 2 and the ntp is able to synchronize to it:
remote refid st t when poll reach delay offset jitter
==============================================================================
127.127.1.0 .LOCL. 10 l 16h 64 0 0.000 0.000 0.000
64.99.80.121 .STEP. 16 u - 128 0 0.000 0.000 0.000
*91.189.91.157 194.58.200.20 2 u 15 128 377 79.191 0.042 1.964
The ntptrace gives timeout for both servers:
$ ntptrace ntp.ubuntu.com
ntp.ubuntu.com: timed out, nothing received
***Request timed out
$ ntptrace ntp.pool.org
ntp.pool.org: timed out, nothing received
***Request timed out
Am I missing some configuration to be able to synchronize only with ntp.pool.org?
I have checked the answers here but I'm not finding an answer for my case
UPDATE
This VM will act as ntp server for another VMs.
Query results:
ntpdate -q ntp.pool.org
server 64.99.80.121, stratum 0, offset 0.000000, delay 0.00000
26 Nov 14:34:37 ntpdate[4577]: no server suitable for synchronization found
ntpdate -q ntp.ubuntu.com
server 91.189.94.4, stratum 2, offset 0.000290, delay 0.03615
server 91.189.89.199, stratum 2, offset 0.000654, delay 0.03668
server 91.189.89.198, stratum 2, offset -0.000251, delay 0.03674
server 91.189.91.157, stratum 2, offset 0.000159, delay 0.10548
26 Nov 14:36:15 ntpdate[4585]: adjust time server 91.189.94.4 offset 0.000290 sec
I have found in ntp documentation that stratum 16 indicates some problems with the ntp server. Can we conclude that ntp.pool.org is not working ?
Solution 1:
ntp.pool.org
Should be
pool.ntp.org
(reference: https://www.pool.ntp.org)