Public bug reported: Prerequisites:
* Two Windows Domain Controllers with NTP enabled * ntpsec from Ubuntu 24 LTS $ apt-cache madison ntpsec ntpsec | 1.2.2+dfsg1-4build2 | http://de.archive.ubuntu.com/ubuntu noble/universe amd64 Packages Steps to reproduce: * Check the NTP servers for functionality $ ntpdig 172.16.1.10 ; ntpdig 172.17.1.10 2025-03-20 08:22:21.264546 (+0100) -3.769277 +/- 0.001159 172.16.1.10 s3 no-leap 2025-03-20 08:22:21.312246 (+0100) -3.770774 +/- 0.000214 172.17.1.10 s4 no-leap * Restart ntpsec and wait for resync Result: * Even after hours the ntpd is not synchronized $ ntpstat unsynchronised polling server every 1 s $ ntpq -pn remote refid st t when poll reach delay offset jitter ======================================================================================================= +172.17.1.10 172.16.1.10 4 u 27 64 377 0.3657 -3769.93 16.9005 +172.16.1.10 217.91.44.17 3 u 25 64 377 3.4433 -3768.02 17.1954 LOCAL(0) .LOCL. 5 l 40 64 377 0.0000 0.0000 0.0000 $ tcpdump shows a communication with "NTPv4, Client" and "NTPv3, Server" which should not matter, because ntpv4 is supposed to be backward compatible. 09:19:11.955253 IP 192.168.10.93.123 > 172.17.1.10.123: NTPv4, Client, length 48 09:19:11.955564 IP 172.17.1.10.123 > 192.168.10.93.123: NTPv3, Server, length 48 ** Affects: ntpsec (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2103691 Title: ntpd from ntpsec does not synchronize To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ntpsec/+bug/2103691/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
