chrony time server not synchronised

chrony
11,992

No, none of your sources are returning NTP packets, including ptbtime1.ptb.de. ? state is unreachable, same as 0 for reach. nc is not a full test, it just sends a few UDP packets with nothing in them.

  • Check if chrony thinks it is online with chronyc activity. Restore network connection and tell chrony about it with chronyc online
  • Check firewalls allow udp/123 destination.
  • Check your local NTP service is running and allows this host.
  • Try NTP servers known to provide public access, such as 2.pool.ntp.org

Compare to a working device on your network that has NTP service.

Share:
11,992

Related videos on Youtube

tom
Author by

tom

Updated on September 18, 2022

Comments

  • tom
    tom almost 2 years

    My chrony time server can get the time from another internal time server but not from time servers on the Internet:

    chronyc sources
210 Number of sources = 9
MS Name/IP address         Stratum Poll Reach LastRx Last sample
===============================================================================
^? ptbtime1.ptb.de               0   7     0     -     +0ns[   +0ns] +/-    0ns
^? static.133.158.47.78.cli>     0   7     0     -     +0ns[   +0ns] +/-    0ns
^? alpha.rueckgr.at              0   7     0     -     +0ns[   +0ns] +/-    0ns
^? stratum2-2.NTP.TechFak.N>     0   7     0     -     +0ns[   +0ns] +/-    0ns
^? totoro.ax86.net               0   7     0     -     +0ns[   +0ns] +/-    0ns
^? 195.50.171.101                0   7     0     -     +0ns[   +0ns] +/-    0ns
^? 82.165.77.164                 0   7     0     -     +0ns[   +0ns] +/-    0ns
^? 79.133.44.136                 0   7     0     -     +0ns[   +0ns] +/-    0ns
^? ntp1.radio-sunshine.org       0   7     0     -     +0ns[   +0ns] +/-    0ns


chronyc tracking
Reference ID    : 00000000 ()
Stratum         : 0
Ref time (UTC)  : Thu Jan 01 00:00:00 1970
System time     : 0.000000009 seconds fast of NTP time
Last offset     : +0.000000000 seconds
RMS offset      : 0.000000000 seconds
Frequency       : 0.379 ppm fast
Residual freq   : +0.000 ppm
Skew            : 0.000 ppm
Root delay      : 1.000000000 seconds
Root dispersion : 1.000000000 seconds
Update interval : 0.0 seconds
Leap status     : Not synchronised


nc -zvu ptbtime1.ptb.de 123
Connection to ptbtime1.ptb.de 123 port [udp/ntp] succeeded!

    I would be very happy to receive tips that would lead to problem solving.

    No, none of your sources are returning NTP packets, including ptbtime1.ptb.de. ? state is unreachable, same as 0 for reach. nc is not a full test, it just sends a few UDP packets with nothing in them.

    Which tool can I use instead? I tried nmap socat on the other NTP Server but I was not able to establish a connection

    Check if chrony thinks it is online with chronyc activity.

      chronyc activity
200 OK
39 sources online
0 sources offline
0 sources doing burst (return to online)
0 sources doing burst (return to offline)
0 sources with unknown address

    Restore network connection and tell chrony about it with chronyc online

    netplan apply
chronyc online
200 OK

    Check firewalls allow udp/123 destination.

    Pleas let me know which tool shall I use.

    But we can see that the Firewall is open:

    telnet www.google.de 80
Trying 216.58.212.163...
Connected to www.google.de.

nc -zvu ptbtime1.ptb.de 123
Connection to ptbtime1.ptb.de 123 port [udp/ntp] succeeded!

    Check your local NTP service is running and allows this host

     chrony.service - chrony, an NTP client/server
     Loaded: loaded (/lib/systemd/system/chrony.service; enabled; vendor preset: enabled)
     Active: active (running) since Wed 2020-12-23 09:56:51 CET; 2h 12min ago
       Docs: man:chronyd(8)
             man:chronyc(1)
             man:chrony.conf(5)
   Main PID: 221814 (chronyd)
      Tasks: 2 (limit: 1074)
     Memory: 1.7M
     CGroup: /system.slice/chrony.service
             ├─221814 /usr/sbin/chronyd -F -1
             └─221815 /usr/sbin/chronyd -F -1

Dec 23 12:05:19 chrony-time-server chronyd[221814]: Source 2606:4700:f1::1 offline
Dec 23 12:05:19 chrony-time-server chronyd[221814]: Source 2a01:4f8:221:b52::2 offline
Dec 23 12:05:30 chrony-time-server chronyd[221814]: Source 2607:f8f8:721:e301::123 online
Dec 23 12:05:30 chrony-time-server chronyd[221814]: Source 2a01:4f8:141:282::5:1 online
Dec 23 12:05:30 chrony-time-server chronyd[221814]: Source 2402:1f00:8000:800::414 online
Dec 23 12:05:30 chrony-time-server chronyd[221814]: Source 2a01:4f8:202:144d::2 online
Dec 23 12:05:30 chrony-time-server chronyd[221814]: Source 2001:67c:1560:8003::c7 online
Dec 23 12:05:30 chrony-time-server chronyd[221814]: Source 2001:67c:1560:8003::c8 online
Dec 23 12:05:30 chrony-time-server chronyd[221814]: Source 2606:4700:f1::1 online
Dec 23 12:05:30 chrony-time-server chronyd[221814]: Source 2a01:4f8:221:b52::2 online

    It shows that sources are online.

    Try NTP servers known to provide public access, such as 2.pool.ntp.org

    nano /etc/chrony/chrony.conf


pool pool.ntp.org iburst

server 192.53.103.108 iburst

pool 2.pool.ntp.org iburst

server 0.de.pool.ntp.org iburst
server 1.de.pool.ntp.org iburst
server 2.de.pool.ntp.org iburst
server 3.de.pool.ntp.org iburst


pool ntp.ubuntu.com        iburst maxsources 4
pool 0.ubuntu.pool.ntp.org iburst maxsources 1
pool 1.ubuntu.pool.ntp.org iburst maxsources 1
pool 2.ubuntu.pool.ntp.org iburst maxsources 2

    Compare to a working device on your network that has NTP service.

    The actual time server is running with ntp.serive

    ● ntp.service - Network Time Service
     Loaded: loaded (/lib/systemd/system/ntp.service; enabled; vendor preset: enabled)
     Active: active (running) since Thu 2020-11-12 09:47:21 CET; 1 months 10 days ago
       Docs: man:ntpd(8)
   Main PID: 773 (ntpd)
      Tasks: 2 (limit: 1074)
     Memory: 2.0M
     CGroup: /system.slice/ntp.service
             └─773 /usr/sbin/ntpd -p /var/run/ntpd.pid -g -u 112:117

Dec 22 12:40:07 ntp-time-server ntpd[773]: Soliciting pool server 136.243.202.118
Dec 22 12:40:08 ntp-time-server ntpd[773]: Soliciting pool server 131.234.220.232
Dec 22 12:40:10 ntp-time-server ntpd[773]: Soliciting pool server 78.46.162.102
Dec 22 12:40:11 ntp-time-server ntpd[773]: Soliciting pool server 213.239.239.165
Dec 22 12:40:12 ntp-time-server ntpd[773]: Soliciting pool server 144.76.76.107
Dec 22 12:40:13 ntp-time-server ntpd[773]: Soliciting pool server 82.100.248.10
Dec 22 13:52:03 ntp-time-server ntpd[773]: Soliciting pool server 195.201.163.190
Dec 22 13:52:04 ntp-time-server ntpd[773]: Soliciting pool server 162.159.200.1
Dec 23 05:50:20 ntp-time-server ntpd[773]: 213.239.239.165 local addr 10.0.16.254 -> <null>
Dec 23 09:46:11 ntp-time-server ntpd[773]: Soliciting pool server 162.159.200.123

ntpstat
synchronised to NTP server (79.133.44.141) at stratum 2
   time correct to within 16 ms
   polling server every 128 s

    I have checked everything and it seems that everything is ok but chrony still does not work:

     chronyc tracking
Reference ID    : 00000000 ()
Stratum         : 0
Ref time (UTC)  : Thu Jan 01 00:00:00 1970
System time     : 0.000000027 seconds fast of NTP time
Last offset     : +0.000000000 seconds
RMS offset      : 0.000000000 seconds
Frequency       : 0.379 ppm fast
Residual freq   : +0.000 ppm
Skew            : 0.000 ppm
Root delay      : 1.000000000 seconds
Root dispersion : 1.000000000 seconds
Update interval : 0.0 seconds
Leap status     : Not synchronised

     chronyc ntpdata

Remote address  : [UNSPEC] (00000000)
Remote port     : 0
Local address   : [UNSPEC] (00000000)
Leap status     : Normal
Version         : 0
Mode            : Invalid
Stratum         : 0
Poll interval   : 0 (1 seconds)
Precision       : 0 (1.000000000 seconds)
Root delay      : 0.000000 seconds
Root dispersion : 0.000000 seconds
Reference ID    : 00000000 ()
Reference time  : Thu Jan 01 00:00:00 1970
Offset          : +0.000000000 seconds
Peer delay      : 0.000000000 seconds
Peer dispersion : 0.000000000 seconds
Response time   : 0.000000000 seconds
Jitter asymmetry: +0.00
NTP tests       : 000 000 0000
Interleaved     : No
Authenticated   : No
TX timestamping : Invalid
RX timestamping : Invalid
Total TX        : 24
Total RX        : 0
Total valid RX  : 0

Remote address  : [UNSPEC] (00000000)
Remote port     : 0
Local address   : [UNSPEC] (00000000)
Leap status     : Normal
Version         : 0
Mode            : Invalid
Stratum         : 0
Poll interval   : 0 (1 seconds)
Precision       : 0 (1.000000000 seconds)
Root delay      : 0.000000 seconds
Root dispersion : 0.000000 seconds
Reference ID    : 00000000 ()
Reference time  : Thu Jan 01 00:00:00 1970
Offset          : +0.000000000 seconds
Peer delay      : 0.000000000 seconds
Peer dispersion : 0.000000000 seconds
Response time   : 0.000000000 seconds
Jitter asymmetry: +0.00
NTP tests       : 000 000 0000
Interleaved     : No
Authenticated   : No
TX timestamping : Invalid
RX timestamping : Invalid
Total TX        : 24
Total RX        : 0
Total valid RX  : 0

Remote address  : [UNSPEC] (00000000)
Remote port     : 0
Local address   : [UNSPEC] (00000000)
Leap status     : Normal
Version         : 0
Mode            : Invalid
Stratum         : 0
Poll interval   : 0 (1 seconds)
Precision       : 0 (1.000000000 seconds)
Root delay      : 0.000000 seconds
Root dispersion : 0.000000 seconds
Reference ID    : 00000000 ()
Reference time  : Thu Jan 01 00:00:00 1970
Offset          : +0.000000000 seconds
Peer delay      : 0.000000000 seconds
Peer dispersion : 0.000000000 seconds
Response time   : 0.000000000 seconds
Jitter asymmetry: +0.00
NTP tests       : 000 000 0000
Interleaved     : No
Authenticated   : No
TX timestamping : Invalid
RX timestamping : Invalid
Total TX        : 24
Total RX        : 0
Total valid RX  : 0

Remote address  : [UNSPEC] (00000000)
Remote port     : 0
Local address   : [UNSPEC] (00000000)
Leap status     : Normal
Version         : 0
Mode            : Invalid
Stratum         : 0
Poll interval   : 0 (1 seconds)
Precision       : 0 (1.000000000 seconds)
Root delay      : 0.000000 seconds
Root dispersion : 0.000000 seconds
Reference ID    : 00000000 ()
Reference time  : Thu Jan 01 00:00:00 1970
Offset          : +0.000000000 seconds
Peer delay      : 0.000000000 seconds
Peer dispersion : 0.000000000 seconds
Response time   : 0.000000000 seconds
Jitter asymmetry: +0.00
NTP tests       : 000 000 0000
Interleaved     : No
Authenticated   : No
TX timestamping : Invalid
RX timestamping : Invalid
Total TX        : 24
Total RX        : 0
Total valid RX  : 0

Remote address  : [UNSPEC] (00000000)
Remote port     : 0
Local address   : [UNSPEC] (00000000)
Leap status     : Normal
Version         : 0
Mode            : Invalid
Stratum         : 0
Poll interval   : 0 (1 seconds)
Precision       : 0 (1.000000000 seconds)
Root delay      : 0.000000 seconds
Root dispersion : 0.000000 seconds
Reference ID    : 00000000 ()
Reference time  : Thu Jan 01 00:00:00 1970
Offset          : +0.000000000 seconds
Peer delay      : 0.000000000 seconds
Peer dispersion : 0.000000000 seconds
Response time   : 0.000000000 seconds
Jitter asymmetry: +0.00
NTP tests       : 000 000 0000
Interleaved     : No
Authenticated   : No
TX timestamping : Invalid
RX timestamping : Invalid
Total TX        : 24
Total RX        : 0
Total valid RX  : 0

Remote address  : [UNSPEC] (00000000)
Remote port     : 0
Local address   : [UNSPEC] (00000000)
Leap status     : Normal
Version         : 0
Mode            : Invalid
Stratum         : 0
Poll interval   : 0 (1 seconds)
Precision       : 0 (1.000000000 seconds)
Root delay      : 0.000000 seconds
Root dispersion : 0.000000 seconds
Reference ID    : 00000000 ()
Reference time  : Thu Jan 01 00:00:00 1970
Offset          : +0.000000000 seconds
Peer delay      : 0.000000000 seconds
Peer dispersion : 0.000000000 seconds
Response time   : 0.000000000 seconds
Jitter asymmetry: +0.00
NTP tests       : 000 000 0000
Interleaved     : No
Authenticated   : No
TX timestamping : Invalid
RX timestamping : Invalid
Total TX        : 24
Total RX        : 0
Total valid RX  : 0

Remote address  : [UNSPEC] (00000000)
Remote port     : 0
Local address   : [UNSPEC] (00000000)
Leap status     : Normal
Version         : 0
Mode            : Invalid
Stratum         : 0
Poll interval   : 0 (1 seconds)
Precision       : 0 (1.000000000 seconds)
Root delay      : 0.000000 seconds
Root dispersion : 0.000000 seconds
Reference ID    : 00000000 ()
Reference time  : Thu Jan 01 00:00:00 1970
Offset          : +0.000000000 seconds
Peer delay      : 0.000000000 seconds
Peer dispersion : 0.000000000 seconds
Response time   : 0.000000000 seconds
Jitter asymmetry: +0.00
NTP tests       : 000 000 0000
Interleaved     : No
Authenticated   : No
TX timestamping : Invalid
RX timestamping : Invalid
Total TX        : 24
Total RX        : 0
Total valid RX  : 0

Remote address  : [UNSPEC] (00000000)
Remote port     : 0
Local address   : [UNSPEC] (00000000)
Leap status     : Normal
Version         : 0
Mode            : Invalid
Stratum         : 0
Poll interval   : 0 (1 seconds)
Precision       : 0 (1.000000000 seconds)
Root delay      : 0.000000 seconds
Root dispersion : 0.000000 seconds
Reference ID    : 00000000 ()
Reference time  : Thu Jan 01 00:00:00 1970
Offset          : +0.000000000 seconds
Peer delay      : 0.000000000 seconds
Peer dispersion : 0.000000000 seconds
Response time   : 0.000000000 seconds
Jitter asymmetry: +0.00
NTP tests       : 000 000 0000
Interleaved     : No
Authenticated   : No
TX timestamping : Invalid
RX timestamping : Invalid
Total TX        : 24
Total RX        : 0
Total valid RX  : 0

Remote address  : [UNSPEC] (00000000)
Remote port     : 0
Local address   : [UNSPEC] (00000000)
Leap status     : Normal
Version         : 0
Mode            : Invalid
Stratum         : 0
Poll interval   : 0 (1 seconds)
Precision       : 0 (1.000000000 seconds)
Root delay      : 0.000000 seconds
Root dispersion : 0.000000 seconds
Reference ID    : 00000000 ()
Reference time  : Thu Jan 01 00:00:00 1970
Offset          : +0.000000000 seconds
Peer delay      : 0.000000000 seconds
Peer dispersion : 0.000000000 seconds
Response time   : 0.000000000 seconds
Jitter asymmetry: +0.00
NTP tests       : 000 000 0000
Interleaved     : No
Authenticated   : No
TX timestamping : Invalid
RX timestamping : Invalid
Total TX        : 24
Total RX        : 0
Total valid RX  : 0

Remote address  : [UNSPEC] (00000000)
Remote port     : 0
Local address   : [UNSPEC] (00000000)
Leap status     : Normal
Version         : 0
Mode            : Invalid
Stratum         : 0
Poll interval   : 0 (1 seconds)
Precision       : 0 (1.000000000 seconds)
Root delay      : 0.000000 seconds
Root dispersion : 0.000000 seconds
Reference ID    : 00000000 ()
Reference time  : Thu Jan 01 00:00:00 1970
Offset          : +0.000000000 seconds
Peer delay      : 0.000000000 seconds
Peer dispersion : 0.000000000 seconds
Response time   : 0.000000000 seconds
Jitter asymmetry: +0.00
NTP tests       : 000 000 0000
Interleaved     : No
Authenticated   : No
TX timestamping : Invalid
RX timestamping : Invalid
Total TX        : 0
Total RX        : 0
Total valid RX  : 0

Remote address  : [UNSPEC] (00000000)
Remote port     : 0
Local address   : [UNSPEC] (00000000)
Leap status     : Normal
Version         : 0
Mode            : Invalid
Stratum         : 0
Poll interval   : 0 (1 seconds)
Precision       : 0 (1.000000000 seconds)
Root delay      : 0.000000 seconds
Root dispersion : 0.000000 seconds
Reference ID    : 00000000 ()
    • John Mahowald
      John Mahowald over 3 years
      While testing with actual NTP commands is necessary, ntpdate is not required on a chrony system. chronyc sources shows peer reachability, chronyc ntpdata shows packet details, chronyc burst sends a few packets now.
    • Ward - Reinstate Monica
      Ward - Reinstate Monica over 3 years
      The question has been closed to give you a chance to edit it - you need to move some of your comments from your answers into the question and then delete them. Then the question can be reviewed and possibly re-opened.
  • tom
    tom over 3 years
    My answer is above

Recents

Why Is PNG file with Drop Shadow in Flutter Web App Grainy?
How to troubleshoot crashes detected by Google Play Store for Flutter app
Cupertino DateTime picker interfering with scroll behaviour
Why does awk -F work for most letters, but not for the letter "t"?
Flutter change focus color and icon color but not works
How to print and connect to printer using flutter desktop via usb?
Critical issues have been reported with the following SDK versions: com.google.android.gms:play-services-safetynet:17.0.0
Flutter Dart - get localized country name from country code
navigatorState is null when using pushNamed Navigation onGenerateRoutes of GetMaterialPage
Android Sdk manager not found- Flutter doctor error
Flutter Laravel Push Notification without using any third party like(firebase,onesignal..etc)
How to change the color of ElevatedButton when entering text in TextField

Related

How do I tell if chronyd is actually self-synchronising correctly?
"system clock synchronized: no", flip it to yes
Chrony doesn't appear to be syncing with the servers I've specified
Chrony time synchronization on huge time diff
Force chrony time check
Synchronize clock with NTP while online, and with RTC while offline?
system clock synchronized: no
CentOS 7 timedatectl does not work properly with chronyd
Chrony client do not change system and hardware date
Set clock to 24 hour format for all users