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    NTP clock sync

    Scheduled Pinned Locked Moved General pfSense Questions
    49 Posts 7 Posters 22.1k Views
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    • P
      P3R
      last edited by

      Removing snort didn't help. :'(

      Even manually starting the service does not always work but I have found what I think is an always working workaround: press the Save button (nothing needs to be changed) on the System, General Setup page.

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      • K
        kejianshi
        last edited by

        Are you blocking port 123?  Forwarding port 123?  Is your NTP server busted?

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        • P
          P3R
          last edited by

          I am actually forwarding ntp on my WAN interface to my internal ntp server. No on the other 2 questions.

          I should probably explain a little more about my configuration.

          As I am new to pfSense, this is a testing/learning installation in a VirtualBox VM (with all 3 network interfaces bridged).

          It is located behind a simple NATing DD-WRT router without any port forwarding, so the ntp service forwarding in pfSense mentioned above is never hit by any traffic.

          I have my ntp server running in the VirtualBox host OS (Ubuntu Server 12.04 LTS) and in addition to that I have a couple of public ntp servers configured in pfSense.

          Internal ntp (and VirtualBox) host is 192.168.10.10 and pfSense VM is 192.168.10.254.

          Most of the times the ntp service does not start following a reboot but occasionally it works.

          When the service starts, sometimes it is able to connect with all my configured servers but most often I get "Unreach/Pending" on the public ones.

          I presently do not have any interfaces selected on the Services, NTP page but I have noticed no difference in behaviour when selecting LAN and WAN.

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          • K
            kejianshi
            last edited by

            Ahhh - I see.  So you broke it.

            Did you know that pfsense makes an ok NTP server?

            Why are you doing it elsewhere?

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            • P
              P3R
              last edited by

              @kejianshi:

              Ahhh - I see.  So you broke it.

              I'm sorry for being thick, but in what way?

              Did you know that pfsense makes an ok NTP server?

              It doesn't appear to be so okay to me… ;D

              Why are you doing it elsewhere?

              Because that was used long before I even started to consider pfSense. I also like redundancy so I intend to keep it even if I decide on using pfSense for production.

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              • K
                kejianshi
                last edited by

                Well - You have pfsense being an NTP server already. Then you have additional NTP Servers.  I think all these NTP Servers are on public IP right?

                I wonder.  What would happen if you stopped forwarding your NTP port?  Just removed that rule you added.

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                • P
                  P3R
                  last edited by

                  @kejianshi:

                  Well - You have pfsense being an NTP server already.

                  Correct but presently being very unreliable (that may however be my fault).

                  Then you have additional NTP Servers.

                  Only one, my Ubuntu server (192.168.10.10) on my internal LAN network. The other ntp servers I have configured in pfSense are public ntp servers on the internet.

                  I wonder.  What would happen if you stopped forwarding your NTP port?  Just removed that rule you added.

                  No difference, ntp service in pfSense is still unreliable.

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                  • K
                    kejianshi
                    last edited by

                    Hmmm…  Sorry if you already said, but is this freshly upgraded to 2.1?

                    If so, maybe a clean install with fix it for you.  You can restore your settings after.

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                    • P
                      P3R
                      last edited by

                      @kejianshi:

                      Hmmm…  Sorry if you already said, but is this freshly upgraded to 2.1?

                      Yes. 2.0.3 > 2.1 RC > 2.1 released, with the two upgrades happening only the last few days.

                      If so, maybe a clean install with fix it for you.

                      Maybe and that is of course not a problem since this is for testing only but when evaluating the system for possible production use, it isn't an confidence building message…

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                      • K
                        kejianshi
                        last edited by

                        I suspect a clean install SHOULD fix it since mine works fine as do most.
                        Keep in mind I always fully expect for the person with a pfsense complaint to flounder helplessly for about a couple days and then suddenly say "I just realized my Ethernet cable was unplugged" or something.

                        I'd wipe it and reinstall - load no packages and set no rules.  Try NTP.

                        If it works, it works.

                        Then restore your settings.

                        Hopefully it doesn't break.

                        If it does, it means something you have done is wrong.

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                        • P
                          P3R
                          last edited by

                          Will do.

                          Thank you very much for being so very helpful!

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                          • K
                            kejianshi
                            last edited by

                            I haven't helped you yet - But hopefully I can.  Lets see what happens with a fresh install.

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                            • P
                              P3R
                              last edited by

                              At least you have tried very much, for which I am grateful.

                              New 2.1 install, configuration restored -> same issue…

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                              • K
                                kejianshi
                                last edited by

                                That is so strange.  Something on your network is killing NTP.  Has to be.

                                Its not broken here.  Did you select WAN as interface and save?  And you entered DNS servers?  And you have NTP server address entered?

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                                • P
                                  P3R
                                  last edited by

                                  @kejianshi:

                                  Something on your network is killing NTP.  Has to be.

                                  I very much doubt that (no such indication on any other system in the network) and even if it was, the result in pfSense should only be no contact (or in some other way a non-functional ntp), not that the service totally fail to start.

                                  Regardless of whatever specific things I (and owner524 and val) have in the setup that causes issues, the service should still be starting. I tend to think it is a bug, that is only showing under some specific conditions.

                                  It would probably be very useful if the other users reporting problems here could explain about their respective configurations. Maybe we could find out what we have in common that may cause the issue?

                                  In addition to what I have reported so far in the thread, I can add that it is a full 64 bit install and I used the FreeBSD 64 bit template, gave it 3 bridged network interfaces, 2 cpus and 4011 MB RAM in VirtualBox.

                                  Its not broken here.

                                  Yes it seems only a few of us are having this issue.

                                  Did you select WAN as interface and save?

                                  Well I have to select both WAN and LAN since I have both my own and public ntp servers configured but there is no change in behaviour. And really, not selecting any interface does mean all interfaces are used, if I understand things correctly? If so it should be more forgiving, if anything, to not select any interface.

                                  Only selecting the WAN interface means also that in your local network you cannot use the pfSense as an ntp server serving your internal network, doesn't it?

                                  By my trial and error testing, I'm under the impression that the ntp server interface selection does limit the interface usage both for when the ntp service connects to other servers and also for serving ntp clients.

                                  And you entered DNS servers?

                                  Yes and it is working.

                                  And you have NTP server address entered?

                                  Yes, remember that when I use the manual workaround reported earlier (press the Save button on the System, General Setup page), so far the service have started every time and then it works.

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                                  • D
                                    doktornotor Banned
                                    last edited by

                                    So the process crashes, or???

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                                    • P
                                      P3R
                                      last edited by

                                      Yes, it appears that way. When I logged in today the ntp service was once again stopped. I've attached the last of my ntp log…

                                      Ntp_log.jpg
                                      Ntp_log.jpg_thumb

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                                      • D
                                        doktornotor Banned
                                        last edited by

                                        SIGTERM does not sound like crash. Something is telling ntpd to terminate.

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                                        • P
                                          P3R
                                          last edited by

                                          Okay.

                                          At least it's not me… ;D

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                                          • P
                                            phil.davis
                                            last edited by

                                            Look in the system log around the time of the "signal 15" NTPD exit. Hopefully there was some interesting other activity - link down/up, VPN down/up , something that might give a clue as to why NTPD is being told to stop. Then the question is, why is it not started again, or what goes wrong whne the system does try to start it again?

                                            As the Greek philosopher Isosceles used to say, "There are 3 sides to every triangle."
                                            If I helped you, then help someone else - buy someone a gift from the INF catalog http://secure.inf.org/gifts/usd/

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