NTP Issue
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Just go to Diag > States in the webgui and filter by
:123to see the ntp states.You should see a state on the interface connected to the ntp server with no corresponding state on another interface. That will be the state opened from the firewall itself.
It's usually pretty obvious but you likely have a bunch of ntp states so it might be more difficult to spot.
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I note that the states can timeout so may not always be there. I restarted ntpd to force it to reach out to get that screenshot. But you could just wait. You can see two way traffic on that state though.
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@stephenw10
The top two are the local NTP servers.
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@stephenw10 said in NTP Issue:
Just go to Diag > States in the webgui and filter by
:123to see the ntp states.You should see a state on the interface connected to the ntp server with no corresponding state on another interface. That will be the state opened from the firewall itself.
It's usually pretty obvious but you likely have a bunch of ntp states so it might be more difficult to spot.
Thanks for that, by the way. I tend to only look and remember exactly what I'm looking for in a list. I had no idea this option was available.
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That's in 2.7.2? I note the states are shown as on 'all' interfaces. Which should be fine but potentially could hide an asymmetric route. It wouldn't block ntp though.
So it looks like two traffic to both servers. I assume they are still reported as 'unreach'?
I would next run a pcap for that traffic and see what's actually being sent.
If you enable all the logging in ntpd do you see any additional errors?
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Only error is the bad checksum.
This is logging everything on the OPT2 port because that's all that port does.22:12:10.232164 60:be:b4:07:c6:17 > a6:4c:5e:80:2e:fb, ethertype IPv4 (0x0800), length 90: (tos 0xb8, ttl 64, id 16199, offset 0, flags [none], proto UDP (17), length 76)
172.16.1.1.123 > 172.16.1.2.123: [bad udp cksum 0x5a6d -> 0x55a7!] NTPv4, Client, length 48
Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -24
Root Delay: 0.015853, Root dispersion: 0.002059, Reference-ID: 0x11fd422d
Reference Timestamp: 3958891878.246163694 (2025-06-14T12:11:18Z)
Originator Timestamp: 3958891863.227000500 (2025-06-14T12:11:03Z)
Receive Timestamp: 3958891863.230474057 (2025-06-14T12:11:03Z)
Transmit Timestamp: 3958891930.232146500 (2025-06-14T12:12:10Z)
Originator - Receive Timestamp: +0.003473557
Originator - Transmit Timestamp: +67.005146000
22:12:10.232256 a6:4c:5e:80:2e:fb > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 60: Ethernet (len 6), IPv4 (len 4), Request who-has 172.16.1.1 tell 172.16.1.2, length 46
22:12:10.232299 60:be:b4:07:c6:17 > a6:4c:5e:80:2e:fb, ethertype ARP (0x0806), length 42: Ethernet (len 6), IPv4 (len 4), Reply 172.16.1.1 is-at 60:be:b4:07:c6:17, length 28
22:12:10.232450 a6:4c:5e:80:2e:fb > 60:be:b4:07:c6:17, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 255, id 49682, offset 0, flags [none], proto UDP (17), length 76)
172.16.1.2.123 > 172.16.1.1.123: [udp sum ok] NTPv4, Server, length 48
Leap indicator: (0), Stratum 1 (primary reference), poll 0 (1s), precision -18
Root Delay: 0.000000, Root dispersion: 0.000000, Reference-ID: PPS^@
Reference Timestamp: 3958891930.000000000 (2025-06-14T12:12:10Z)
Originator Timestamp: 3958891930.232146500 (2025-06-14T12:12:10Z)
Receive Timestamp: 3958891930.229000500 (2025-06-14T12:12:10Z)
Transmit Timestamp: 3958891930.229000500 (2025-06-14T12:12:10Z)
Originator - Receive Timestamp: -0.003146000
Originator - Transmit Timestamp: -0.003146000
22:12:18.274942 60:be:b4:07:c6:17 > a6:4c:5e:80:2e:fb, ethertype IPv4 (0x0800), length 90: (tos 0xb8, ttl 64, id 10695, offset 0, flags [none], proto UDP (17), length 76)
172.16.1.1.123 > 172.16.1.2.123: [bad udp cksum 0x5a6d -> 0x198e!] NTPv4, Client, length 48
Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -24
Root Delay: 0.015853, Root dispersion: 0.002166, Reference-ID: 0x11fd422d
Reference Timestamp: 3958891878.246163694 (2025-06-14T12:11:18Z)
Originator Timestamp: 3958891930.229000500 (2025-06-14T12:12:10Z)
Receive Timestamp: 3958891930.232486680 (2025-06-14T12:12:10Z)
Transmit Timestamp: 3958891938.274935417 (2025-06-14T12:12:18Z)
Originator - Receive Timestamp: +0.003486180
Originator - Transmit Timestamp: +8.045934917
22:12:18.275251 a6:4c:5e:80:2e:fb > 60:be:b4:07:c6:17, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 255, id 49683, offset 0, flags [none], proto UDP (17), length 76)
172.16.1.2.123 > 172.16.1.1.123: [udp sum ok] NTPv4, Server, length 48
Leap indicator: (0), Stratum 1 (primary reference), poll 0 (1s), precision -18
Root Delay: 0.000000, Root dispersion: 0.000000, Reference-ID: PPS^@
Reference Timestamp: 3958891938.000000000 (2025-06-14T12:12:18Z)
Originator Timestamp: 3958891938.274935417 (2025-06-14T12:12:18Z)
Receive Timestamp: 3958891938.272000500 (2025-06-14T12:12:18Z)
Transmit Timestamp: 3958891938.272000500 (2025-06-14T12:12:18Z)
Originator - Receive Timestamp: -0.002934917
Originator - Transmit Timestamp: -0.002934917
22:12:26.228118 60:be:b4:07:c6:17 > a6:4c:5e:80:2e:fb, ethertype IPv4 (0x0800), length 90: (tos 0xb8, ttl 64, id 61166, offset 0, flags [none], proto UDP (17), length 76)
172.16.1.1.123 > 172.16.1.2.123: [bad udp cksum 0x5a6d -> 0x043c!] NTPv4, Client, length 48
Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -24
Root Delay: 0.015853, Root dispersion: 0.002288, Reference-ID: 0x11fd422d
Reference Timestamp: 3958891878.246163694 (2025-06-14T12:11:18Z)
Originator Timestamp: 3958891938.272000500 (2025-06-14T12:12:18Z)
Receive Timestamp: 3958891938.275257606 (2025-06-14T12:12:18Z)
Transmit Timestamp: 3958891946.228090332 (2025-06-14T12:12:26Z)
Originator - Receive Timestamp: +0.003257106
Originator - Transmit Timestamp: +7.956089831
22:12:26.228379 a6:4c:5e:80:2e:fb > 60:be:b4:07:c6:17, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 255, id 49684, offset 0, flags [none], proto UDP (17), length 76)
172.16.1.2.123 > 172.16.1.1.123: [udp sum ok] NTPv4, Server, length 48
Leap indicator: (0), Stratum 1 (primary reference), poll 0 (1s), precision -18
Root Delay: 0.000000, Root dispersion: 0.000000, Reference-ID: PPS^@
Reference Timestamp: 3958891946.000000000 (2025-06-14T12:12:26Z)
Originator Timestamp: 3958891946.228090332 (2025-06-14T12:12:26Z)
Receive Timestamp: 3958891946.225000500 (2025-06-14T12:12:26Z)
Transmit Timestamp: 3958891946.225000500 (2025-06-14T12:12:26Z)
Originator - Receive Timestamp: -0.003089831
Originator - Transmit Timestamp: -0.003089831
22:13:31.239311 60:be:b4:07:c6:17 > a6:4c:5e:80:2e:fb, ethertype IPv4 (0x0800), length 90: (tos 0xb8, ttl 64, id 162, offset 0, flags [none], proto UDP (17), length 76)
172.16.1.1.123 > 172.16.1.2.123: [bad udp cksum 0x5a6d -> 0xe087!] NTPv4, Client, length 48
Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -24
Root Delay: 0.015853, Root dispersion: 0.003265, Reference-ID: 0x11fd422d
Reference Timestamp: 3958891878.246163694 (2025-06-14T12:11:18Z)
Originator Timestamp: 3958891946.225000500 (2025-06-14T12:12:26Z)
Receive Timestamp: 3958891946.228384771 (2025-06-14T12:12:26Z)
Transmit Timestamp: 3958892011.239279145 (2025-06-14T12:13:31Z)
Originator - Receive Timestamp: +0.003384270
Originator - Transmit Timestamp: +65.014278645
22:13:31.239617 a6:4c:5e:80:2e:fb > 60:be:b4:07:c6:17, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 255, id 49685, offset 0, flags [none], proto UDP (17), length 76)
172.16.1.2.123 > 172.16.1.1.123: [udp sum ok] NTPv4, Server, length 48
Leap indicator: (0), Stratum 1 (primary reference), poll 0 (1s), precision -18
Root Delay: 0.000000, Root dispersion: 0.000000, Reference-ID: PPS^@
Reference Timestamp: 3958892011.000000000 (2025-06-14T12:13:31Z)
Originator Timestamp: 3958892011.239279145 (2025-06-14T12:13:31Z)
Receive Timestamp: 3958892011.236000500 (2025-06-14T12:13:31Z)
Transmit Timestamp: 3958892011.236000500 (2025-06-14T12:13:31Z)
Originator - Receive Timestamp: -0.003278645
Originator - Transmit Timestamp: -0.003278645
22:13:39.240470 60:be:b4:07:c6:17 > a6:4c:5e:80:2e:fb, ethertype IPv4 (0x0800), length 90: (tos 0xb8, ttl 64, id 17131, offset 0, flags [none], proto UDP (17), length 76)
172.16.1.1.123 > 172.16.1.2.123: [bad udp cksum 0x5a6d -> 0x8c1b!] NTPv4, Client, length 48
Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -24
Root Delay: 0.015853, Root dispersion: 0.003387, Reference-ID: 0x11fd422d
Reference Timestamp: 3958891878.246163694 (2025-06-14T12:11:18Z)
Originator Timestamp: 3958892011.236000500 (2025-06-14T12:13:31Z)
Receive Timestamp: 3958892011.239621602 (2025-06-14T12:13:31Z)
Transmit Timestamp: 3958892019.240453937 (2025-06-14T12:13:39Z)
Originator - Receive Timestamp: +0.003621102
Originator - Transmit Timestamp: +8.004453436
22:13:39.240810 a6:4c:5e:80:2e:fb > 60:be:b4:07:c6:17, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 255, id 49686, offset 0, flags [none], proto UDP (17), length 76)
172.16.1.2.123 > 172.16.1.1.123: [udp sum ok] NTPv4, Server, length 48
Leap indicator: (0), Stratum 1 (primary reference), poll 0 (1s), precision -18
Root Delay: 0.000000, Root dispersion: 0.000000, Reference-ID: PPS^@
Reference Timestamp: 3958892019.000000000 (2025-06-14T12:13:39Z)
Originator Timestamp: 3958892019.240453937 (2025-06-14T12:13:39Z)
Receive Timestamp: 3958892019.237000500 (2025-06-14T12:13:39Z)
Transmit Timestamp: 3958892019.237000500 (2025-06-14T12:13:39Z)
Originator - Receive Timestamp: -0.003453436
Originator - Transmit Timestamp: -0.003453436 -
And here's the capture of the Lan port traffic, going to the two timeservers:
22:17:38.249421 60:be:b4:07:c6:16 > d8:b0:4c:ff:0e:18, ethertype IPv4 (0x0800), length 90: (tos 0xb8, ttl 64, id 4666, offset 0, flags [none], proto UDP (17), length 76)
192.168.25.254.123 > 192.168.25.250.123: [bad udp cksum 0xb592 -> 0x6c1e!] NTPv4, Client, length 48
Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -24
Root Delay: 0.015853, Root dispersion: 0.002655, Reference-ID: 0x11fd422d
Reference Timestamp: 3958892170.244522493 (2025-06-14T12:16:10Z)
Originator Timestamp: 3958892193.224999999 (2025-06-14T12:16:33Z)
Receive Timestamp: 3958892193.228976720 (2025-06-14T12:16:33Z)
Transmit Timestamp: 3958892258.249393755 (2025-06-14T12:17:38Z)
Originator - Receive Timestamp: +0.003976720
Originator - Transmit Timestamp: +65.024393755
22:17:38.249703 d8:b0:4c:ff:0e:18 > 60:be:b4:07:c6:16, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 255, id 13377, offset 0, flags [none], proto UDP (17), length 76)
192.168.25.250.123 > 192.168.25.254.123: [udp sum ok] NTPv4, Server, length 48
Leap indicator: (0), Stratum 1 (primary reference), poll 0 (1s), precision -18
Root Delay: 0.000000, Root dispersion: 0.000000, Reference-ID: PPS^@
Reference Timestamp: 3958892258.000000000 (2025-06-14T12:17:38Z)
Originator Timestamp: 3958892258.249393755 (2025-06-14T12:17:38Z)
Receive Timestamp: 3958892258.245999999 (2025-06-14T12:17:38Z)
Transmit Timestamp: 3958892258.245999999 (2025-06-14T12:17:38Z)
Originator - Receive Timestamp: -0.003393755
Originator - Transmit Timestamp: -0.003393755
22:17:39.217297 2a:5d:37:0d:2f:56 > 60:be:b4:07:c6:16, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 64, id 1383, offset 0, flags [none], proto UDP (17), length 76)
192.168.25.36.54893 > 17.253.66.45.123: [udp sum ok] NTPv4, Client, length 48
Leap indicator: (0), Stratum 0 (unspecified), poll 0 (1s), precision 0
Root Delay: 0.000000, Root dispersion: 0.000000, Reference-ID: (unspec)
Reference Timestamp: 0.000000000
Originator Timestamp: 0.000000000
Receive Timestamp: 0.000000000
Transmit Timestamp: 2607060682.861695140 (1982-08-13T07:31:22Z)
Originator - Receive Timestamp: 0.000000000
Originator - Transmit Timestamp: 2607060682.861695140 (1982-08-13T07:31:22Z)
22:17:39.227452 60:be:b4:07:c6:16 > a6:4c:5e:80:2e:fa, ethertype IPv4 (0x0800), length 90: (tos 0xb8, ttl 64, id 21966, offset 0, flags [none], proto UDP (17), length 76)
192.168.25.254.123 > 192.168.25.251.123: [bad udp cksum 0xb593 -> 0xbea7!] NTPv4, Client, length 48
Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -24
Root Delay: 0.015853, Root dispersion: 0.002670, Reference-ID: 0x11fd422d
Reference Timestamp: 3958892170.244522493 (2025-06-14T12:16:10Z)
Originator Timestamp: 3958892193.225000500 (2025-06-14T12:16:33Z)
Receive Timestamp: 3958892193.229147624 (2025-06-14T12:16:33Z)
Transmit Timestamp: 3958892259.227428212 (2025-06-14T12:17:39Z)
Originator - Receive Timestamp: +0.004147124
Originator - Transmit Timestamp: +66.002427711
22:17:39.227595 a6:4c:5e:80:2e:fa > 60:be:b4:07:c6:16, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 255, id 65184, offset 0, flags [none], proto UDP (17), length 76)
192.168.25.251.123 > 192.168.25.254.123: [udp sum ok] NTPv4, Server, length 48
Leap indicator: (0), Stratum 1 (primary reference), poll 0 (1s), precision -18
Root Delay: 0.000000, Root dispersion: 0.000000, Reference-ID: PPS^@
Reference Timestamp: 3958892259.000000000 (2025-06-14T12:17:39Z)
Originator Timestamp: 3958892259.227428212 (2025-06-14T12:17:39Z)
Receive Timestamp: 3958892259.224000500 (2025-06-14T12:17:39Z)
Transmit Timestamp: 3958892259.224000500 (2025-06-14T12:17:39Z)
Originator - Receive Timestamp: -0.003427711
Originator - Transmit Timestamp: -0.003427711
22:17:39.233684 60:be:b4:07:c6:16 > 2a:5d:37:0d:2f:56, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 59, id 10280, offset 0, flags [DF], proto UDP (17), length 76)
17.253.66.45.123 > 192.168.25.36.54893: [udp sum ok] NTPv4, Server, length 48
Leap indicator: (0), Stratum 1 (primary reference), poll 3 (8s), precision -20
Root Delay: 0.000000, Root dispersion: 0.000122, Reference-ID: GPSs
Reference Timestamp: 3958892258.503937548 (2025-06-14T12:17:38Z)
Originator Timestamp: 2607060682.861695140 (1982-08-13T07:31:22Z)
Receive Timestamp: 3958892259.225728201 (2025-06-14T12:17:39Z)
Transmit Timestamp: 3958892259.225741781 (2025-06-14T12:17:39Z)
Originator - Receive Timestamp: +1351831576.364033061
Originator - Transmit Timestamp: +1351831576.364046640
22:17:39.262993 2a:5d:37:0d:2f:56 > 60:be:b4:07:c6:16, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 64, id 2302, offset 0, flags [none], proto UDP (17), length 76)
192.168.25.36.53981 > 17.253.66.37.123: [udp sum ok] NTPv4, Client, length 48
Leap indicator: (0), Stratum 0 (unspecified), poll 0 (1s), precision 0
Root Delay: 0.000000, Root dispersion: 0.000000, Reference-ID: (unspec)
Reference Timestamp: 0.000000000
Originator Timestamp: 0.000000000
Receive Timestamp: 0.000000000
Transmit Timestamp: 1486433767.158530957 (1947-02-08T02:16:07Z)
Originator - Receive Timestamp: 0.000000000
Originator - Transmit Timestamp: 1486433767.158530957 (1947-02-08T02:16:07Z)
22:17:39.279675 60:be:b4:07:c6:16 > 2a:5d:37:0d:2f:56, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 58, id 63852, offset 0, flags [DF], proto UDP (17), length 76)
17.253.66.37.123 > 192.168.25.36.53981: [udp sum ok] NTPv4, Server, length 48
Leap indicator: (0), Stratum 1 (primary reference), poll 3 (8s), precision -20
Root Delay: 0.000000, Root dispersion: 0.000106, Reference-ID: GPSs
Reference Timestamp: 3958892258.586580157 (2025-06-14T12:17:38Z)
Originator Timestamp: 1486433767.158530957 (1947-02-08T02:16:07Z)
Receive Timestamp: 3958892259.271475841 (2025-06-14T12:17:39Z)
Transmit Timestamp: 3958892259.271506934 (2025-06-14T12:17:39Z)
Originator - Receive Timestamp: +2472458492.112944884
Originator - Transmit Timestamp: +2472458492.112975977
22:17:39.282440 2a:5d:37:0d:2f:56 > 60:be:b4:07:c6:16, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 64, id 47207, offset 0, flags [none], proto UDP (17), length 76)
192.168.25.36.59010 > 17.253.34.131.123: [udp sum ok] NTPv4, Client, length 48
Leap indicator: (0), Stratum 0 (unspecified), poll 0 (1s), precision 0
Root Delay: 0.000000, Root dispersion: 0.000000, Reference-ID: (unspec)
Reference Timestamp: 0.000000000
Originator Timestamp: 0.000000000
Receive Timestamp: 0.000000000
Transmit Timestamp: 888817167.731403021 (1928-03-02T05:39:27Z)
Originator - Receive Timestamp: 0.000000000
Originator - Transmit Timestamp: 888817167.731403021 (1928-03-02T05:39:27Z)
22:17:39.347506 60:be:b4:07:c6:16 > 2a:5d:37:0d:2f:56, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 56, id 34463, offset 0, flags [DF], proto UDP (17), length 76)
17.253.34.131.123 > 192.168.25.36.59010: [udp sum ok] NTPv4, Server, length 48
Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -20
Root Delay: 0.046661, Root dispersion: 0.003402, Reference-ID: 0x11fd3c7d
Reference Timestamp: 3958892202.110501528 (2025-06-14T12:16:42Z)
Originator Timestamp: 888817167.731403021 (1928-03-02T05:39:27Z)
Receive Timestamp: 3958892259.316572026 (2025-06-14T12:17:39Z)
Transmit Timestamp: 3958892259.316599818 (2025-06-14T12:17:39Z)
Originator - Receive Timestamp: +3070075091.585169005
Originator - Transmit Timestamp: +3070075091.585196797
22:17:46.228411 60:be:b4:07:c6:16 > d8:b0:4c:ff:0e:18, ethertype IPv4 (0x0800), length 90: (tos 0xb8, ttl 64, id 32253, offset 0, flags [none], proto UDP (17), length 76)
192.168.25.254.123 > 192.168.25.250.123: [bad udp cksum 0xb592 -> 0x1b40!] NTPv4, Client, length 48
Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -24
Root Delay: 0.015853, Root dispersion: 0.002777, Reference-ID: 0x11fd422d
Reference Timestamp: 3958892170.244522493 (2025-06-14T12:16:10Z)
Originator Timestamp: 3958892258.245999999 (2025-06-14T12:17:38Z)
Receive Timestamp: 3958892258.249772126 (2025-06-14T12:17:38Z)
Transmit Timestamp: 3958892266.228354771 (2025-06-14T12:17:46Z)
Originator - Receive Timestamp: +0.003772126
Originator - Transmit Timestamp: +7.982354772
22:17:46.228526 d8:b0:4c:ff:0e:18 > 60:be:b4:07:c6:16, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 255, id 13378, offset 0, flags [none], proto UDP (17), length 76)
192.168.25.250.123 > 192.168.25.254.123: [udp sum ok] NTPv4, Server, length 48
Leap indicator: (0), Stratum 1 (primary reference), poll 0 (1s), precision -18
Root Delay: 0.000000, Root dispersion: 0.000000, Reference-ID: PPS^@
Reference Timestamp: 3958892266.000000000 (2025-06-14T12:17:46Z)
Originator Timestamp: 3958892266.228354771 (2025-06-14T12:17:46Z)
Receive Timestamp: 3958892266.224999999 (2025-06-14T12:17:46Z)
Transmit Timestamp: 3958892266.224999999 (2025-06-14T12:17:46Z)
Originator - Receive Timestamp: -0.003354771
Originator - Transmit Timestamp: -0.003354771
22:17:47.238448 60:be:b4:07:c6:16 > a6:4c:5e:80:2e:fa, ethertype IPv4 (0x0800), length 90: (tos 0xb8, ttl 64, id 10742, offset 0, flags [none], proto UDP (17), length 76)
192.168.25.254.123 > 192.168.25.251.123: [bad udp cksum 0xb593 -> 0xd8a6!] NTPv4, Client, length 48
Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -24
Root Delay: 0.015853, Root dispersion: 0.002792, Reference-ID: 0x11fd422d
Reference Timestamp: 3958892170.244522493 (2025-06-14T12:16:10Z)
Originator Timestamp: 3958892259.224000500 (2025-06-14T12:17:39Z)
Receive Timestamp: 3958892259.227604256 (2025-06-14T12:17:39Z)
Transmit Timestamp: 3958892267.238438495 (2025-06-14T12:17:47Z)
Originator - Receive Timestamp: +0.003603755
Originator - Transmit Timestamp: +8.014437994
22:17:47.238727 a6:4c:5e:80:2e:fa > 60:be:b4:07:c6:16, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 255, id 65187, offset 0, flags [none], proto UDP (17), length 76)
192.168.25.251.123 > 192.168.25.254.123: [udp sum ok] NTPv4, Server, length 48
Leap indicator: (0), Stratum 1 (primary reference), poll 0 (1s), precision -18
Root Delay: 0.000000, Root dispersion: 0.000000, Reference-ID: PPS^@
Reference Timestamp: 3958892267.000000000 (2025-06-14T12:17:47Z)
Originator Timestamp: 3958892267.238438495 (2025-06-14T12:17:47Z)
Receive Timestamp: 3958892267.235000500 (2025-06-14T12:17:47Z)
Transmit Timestamp: 3958892267.235000500 (2025-06-14T12:17:47Z)
Originator - Receive Timestamp: -0.003437994
Originator - Transmit Timestamp: -0.003437994
22:17:54.269921 60:be:b4:07:c6:16 > d8:b0:4c:ff:0e:18, ethertype IPv4 (0x0800), length 90: (tos 0xb8, ttl 64, id 47156, offset 0, flags [none], proto UDP (17), length 76)
192.168.25.254.123 > 192.168.25.250.123: [bad udp cksum 0xb592 -> 0x2f0a!] NTPv4, Client, length 48
Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -24
Root Delay: 0.015853, Root dispersion: 0.002899, Reference-ID: 0x11fd422d
Reference Timestamp: 3958892170.244522493 (2025-06-14T12:16:10Z)
Originator Timestamp: 3958892266.224999999 (2025-06-14T12:17:46Z)
Receive Timestamp: 3958892266.228541070 (2025-06-14T12:17:46Z)
Transmit Timestamp: 3958892274.269898005 (2025-06-14T12:17:54Z)
Originator - Receive Timestamp: +0.003541070
Originator - Transmit Timestamp: +8.044898006
22:17:54.270235 d8:b0:4c:ff:0e:18 > 60:be:b4:07:c6:16, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 255, id 13379, offset 0, flags [none], proto UDP (17), length 76)
192.168.25.250.123 > 192.168.25.254.123: [udp sum ok] NTPv4, Server, length 48
Leap indicator: (0), Stratum 1 (primary reference), poll 0 (1s), precision -18
Root Delay: 0.000000, Root dispersion: 0.000000, Reference-ID: PPS^@
Reference Timestamp: 3958892274.000000000 (2025-06-14T12:17:54Z)
Originator Timestamp: 3958892274.269898005 (2025-06-14T12:17:54Z)
Receive Timestamp: 3958892274.265999999 (2025-06-14T12:17:54Z)
Transmit Timestamp: 3958892274.265999999 (2025-06-14T12:17:54Z)
Originator - Receive Timestamp: -0.003898006
Originator - Transmit Timestamp: -0.003898006
22:17:55.272843 60:be:b4:07:c6:16 > a6:4c:5e:80:2e:fa, ethertype IPv4 (0x0800), length 90: (tos 0xb8, ttl 64, id 33470, offset 0, flags [none], proto UDP (17), length 76)
192.168.25.254.123 > 192.168.25.251.123: [bad udp cksum 0xb593 -> 0x6998!] NTPv4, Client, length 48
Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -24
Root Delay: 0.015853, Root dispersion: 0.002914, Reference-ID: 0x11fd422d
Reference Timestamp: 3958892170.244522493 (2025-06-14T12:16:10Z)
Originator Timestamp: 3958892267.235000500 (2025-06-14T12:17:47Z)
Receive Timestamp: 3958892267.238770176 (2025-06-14T12:17:47Z)
Transmit Timestamp: 3958892275.272812137 (2025-06-14T12:17:55Z)
Originator - Receive Timestamp: +0.003769676
Originator - Transmit Timestamp: +8.037811637
22:17:55.272996 a6:4c:5e:80:2e:fa > 60:be:b4:07:c6:16, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 255, id 65189, offset 0, flags [none], proto UDP (17), length 76)
192.168.25.251.123 > 192.168.25.254.123: [udp sum ok] NTPv4, Server, length 48
Leap indicator: (0), Stratum 1 (primary reference), poll 0 (1s), precision -18
Root Delay: 0.000000, Root dispersion: 0.000000, Reference-ID: PPS^@
Reference Timestamp: 3958892275.000000000 (2025-06-14T12:17:55Z)
Originator Timestamp: 3958892275.272812137 (2025-06-14T12:17:55Z)
Receive Timestamp: 3958892275.269000500 (2025-06-14T12:17:55Z)
Transmit Timestamp: 3958892275.269000500 (2025-06-14T12:17:55Z)
Originator - Receive Timestamp: -0.003811637
Originator - Transmit Timestamp: -0.003811637
22:19:01.243785 60:be:b4:07:c6:16 > d8:b0:4c:ff:0e:18, ethertype IPv4 (0x0800), length 90: (tos 0xb8, ttl 64, id 1805, offset 0, flags [none], proto UDP (17), length 76)
192.168.25.254.123 > 192.168.25.250.123: [bad udp cksum 0xb592 -> 0xac0e!] NTPv4, Client, length 48
Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -24
Root Delay: 0.015853, Root dispersion: 0.001998, Reference-ID: 0x11fd422d
Reference Timestamp: 3958892334.278543106 (2025-06-14T12:18:54Z)
Originator Timestamp: 3958892274.265999999 (2025-06-14T12:17:54Z)
Receive Timestamp: 3958892274.270245532 (2025-06-14T12:17:54Z)
Transmit Timestamp: 3958892341.243755483 (2025-06-14T12:19:01Z)
Originator - Receive Timestamp: +0.004245532
Originator - Transmit Timestamp: +66.977755483
22:19:01.243922 d8:b0:4c:ff:0e:18 > 60:be:b4:07:c6:16, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 255, id 13381, offset 0, flags [none], proto UDP (17), length 76)
192.168.25.250.123 > 192.168.25.254.123: [udp sum ok] NTPv4, Server, length 48
Leap indicator: (0), Stratum 1 (primary reference), poll 0 (1s), precision -18
Root Delay: 0.000000, Root dispersion: 0.000000, Reference-ID: PPS^@
Reference Timestamp: 3958892341.000000000 (2025-06-14T12:19:01Z)
Originator Timestamp: 3958892341.243755483 (2025-06-14T12:19:01Z)
Receive Timestamp: 3958892341.239999999 (2025-06-14T12:19:01Z)
Transmit Timestamp: 3958892341.239999999 (2025-06-14T12:19:01Z)
Originator - Receive Timestamp: -0.003755483
Originator - Transmit Timestamp: -0.003755483
22:19:02.226808 60:be:b4:07:c6:16 > a6:4c:5e:80:2e:fa, ethertype IPv4 (0x0800), length 90: (tos 0xb8, ttl 64, id 4793, offset 0, flags [none], proto UDP (17), length 76)
192.168.25.254.123 > 192.168.25.251.123: [bad udp cksum 0xb593 -> 0x1205!] NTPv4, Client, length 48
Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -24
Root Delay: 0.015853, Root dispersion: 0.002014, Reference-ID: 0x11fd422d
Reference Timestamp: 3958892334.278543106 (2025-06-14T12:18:54Z)
Originator Timestamp: 3958892275.269000500 (2025-06-14T12:17:55Z)
Receive Timestamp: 3958892275.273008134 (2025-06-14T12:17:55Z)
Transmit Timestamp: 3958892342.226786521 (2025-06-14T12:19:02Z)
Originator - Receive Timestamp: +0.004007634
Originator - Transmit Timestamp: +66.957786021
22:19:02.227094 a6:4c:5e:80:2e:fa > 60:be:b4:07:c6:16, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 255, id 65198, offset 0, flags [none], proto UDP (17), length 76)
192.168.25.251.123 > 192.168.25.254.123: [udp sum ok] NTPv4, Server, length 48
Leap indicator: (0), Stratum 1 (primary reference), poll 0 (1s), precision -18
Root Delay: 0.000000, Root dispersion: 0.000000, Reference-ID: PPS^@
Reference Timestamp: 3958892342.000000000 (2025-06-14T12:19:02Z)
Originator Timestamp: 3958892342.226786521 (2025-06-14T12:19:02Z)
Receive Timestamp: 3958892342.223000500 (2025-06-14T12:19:02Z)
Transmit Timestamp: 3958892342.223000500 (2025-06-14T12:19:02Z)
Originator - Receive Timestamp: -0.003786021
Originator - Transmit Timestamp: -0.003786021 -
And for the fun of it, here's the WAN NTP traffic.
Also showing bad checksums from other NTP servers. Apparently the firewall doesn't care about that..22:20:58.229920 60:be:b4:07:c6:14 > 00:a2:00:b2:00:c2, ethertype IPv4 (0x0800), length 90: (tos 0xb8, ttl 64, id 52900, offset 0, flags [none], proto UDP (17), length 76)
144.6.175.62.123 > 202.142.142.241.123: [bad udp cksum 0x990e -> 0xebc5!] NTPv4, Client, length 48
Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -24
Root Delay: 0.015853, Root dispersion: 0.003753, Reference-ID: 0x11fd422d
Reference Timestamp: 3958892334.278543106 (2025-06-14T12:18:54Z)
Originator Timestamp: 3958892392.128213263 (2025-06-14T12:19:52Z)
Receive Timestamp: 3958892392.275234537 (2025-06-14T12:19:52Z)
Transmit Timestamp: 3958892458.229885764 (2025-06-14T12:20:58Z)
Originator - Receive Timestamp: +0.147021274
Originator - Transmit Timestamp: +66.101672501
22:20:58.229938 60:be:b4:07:c6:14 > 00:a2:00:b2:00:c2, ethertype IPv4 (0x0800), length 90: (tos 0xb8, ttl 64, id 60754, offset 0, flags [none], proto UDP (17), length 76)
144.6.175.62.123 > 133.243.238.163.123: [bad udp cksum 0xb425 -> 0x1290!] NTPv4, Client, length 48
Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -24
Root Delay: 0.015853, Root dispersion: 0.003753, Reference-ID: 0x11fd422d
Reference Timestamp: 3958892334.278543106 (2025-06-14T12:18:54Z)
Originator Timestamp: 3958892394.329359659 (2025-06-14T12:19:54Z)
Receive Timestamp: 3958892394.420018829 (2025-06-14T12:19:54Z)
Transmit Timestamp: 3958892458.229923653 (2025-06-14T12:20:58Z)
Originator - Receive Timestamp: +0.090659169
Originator - Transmit Timestamp: +63.900563993
22:20:58.259536 00:a2:00:b2:00:c2 > 60:be:b4:07:c6:14, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 61, id 14244, offset 0, flags [DF], proto UDP (17), length 76)
202.142.142.241.123 > 144.6.175.62.123: [udp sum ok] NTPv4, Server, length 48
Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -24
Root Delay: 0.037506, Root dispersion: 0.029220, Reference-ID: 0x825fb350
Reference Timestamp: 3958891648.326188020 (2025-06-14T12:07:28Z)
Originator Timestamp: 3958892458.229885764 (2025-06-14T12:20:58Z)
Receive Timestamp: 3958892458.112557404 (2025-06-14T12:20:58Z)
Transmit Timestamp: 3958892458.112651683 (2025-06-14T12:20:58Z)
Originator - Receive Timestamp: -0.117328359
Originator - Transmit Timestamp: -0.117234081
22:20:58.421542 00:a2:00:b2:00:c2 > 60:be:b4:07:c6:14, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 44, id 60754, offset 0, flags [none], proto UDP (17), length 76)
133.243.238.163.123 > 144.6.175.62.123: [udp sum ok] NTPv4, Server, length 48
Leap indicator: (0), Stratum 1 (primary reference), poll 6 (64s), precision -20
Root Delay: 0.000000, Root dispersion: 0.000000, Reference-ID: NICT
Reference Timestamp: 3958892458.000000000 (2025-06-14T12:20:58Z)
Originator Timestamp: 3958892458.229923653 (2025-06-14T12:20:58Z)
Receive Timestamp: 3958892458.330598795 (2025-06-14T12:20:58Z)
Transmit Timestamp: 3958892458.330599615 (2025-06-14T12:20:58Z)
Originator - Receive Timestamp: +0.100675142
Originator - Transmit Timestamp: +0.100675962
22:21:02.240681 60:be:b4:07:c6:14 > 00:a2:00:b2:00:c2, ethertype IPv4 (0x0800), length 90: (tos 0xb8, ttl 64, id 30150, offset 0, flags [none], proto UDP (17), length 76)
144.6.175.62.123 > 119.18.32.153.123: [bad udp cksum 0xd739 -> 0x9588!] NTPv4, Client, length 48
Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -24
Root Delay: 0.015853, Root dispersion: 0.003814, Reference-ID: 0x11fd422d
Reference Timestamp: 3958892334.278543106 (2025-06-14T12:18:54Z)
Originator Timestamp: 3958892397.238710440 (2025-06-14T12:19:57Z)
Receive Timestamp: 3958892397.246481166 (2025-06-14T12:19:57Z)
Transmit Timestamp: 3958892462.240656015 (2025-06-14T12:21:02Z)
Originator - Receive Timestamp: +0.007770725
Originator - Transmit Timestamp: +65.001945574
22:21:02.256288 00:a2:00:b2:00:c2 > 60:be:b4:07:c6:14, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 62, id 63983, offset 0, flags [DF], proto UDP (17), length 76)
119.18.32.153.123 > 144.6.175.62.123: [udp sum ok] NTPv4, Server, length 48
Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -23
Root Delay: 0.005630, Root dispersion: 0.031539, Reference-ID: 0xcb2353f2
Reference Timestamp: 3958891441.573316619 (2025-06-14T12:04:01Z)
Originator Timestamp: 3958892462.240656015 (2025-06-14T12:21:02Z)
Receive Timestamp: 3958892462.248680412 (2025-06-14T12:21:02Z)
Transmit Timestamp: 3958892462.248759762 (2025-06-14T12:21:02Z)
Originator - Receive Timestamp: +0.008024397
Originator - Transmit Timestamp: +0.008103747
22:21:03.249090 60:be:b4:07:c6:14 > 00:a2:00:b2:00:c2, ethertype IPv4 (0x0800), length 90: (tos 0xb8, ttl 64, id 12962, offset 0, flags [none], proto UDP (17), length 76)
144.6.175.62.123 > 216.239.35.8.123: [bad udp cksum 0x3b86 -> 0x971a!] NTPv4, Client, length 48
Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -24
Root Delay: 0.015853, Root dispersion: 0.003829, Reference-ID: 0x11fd422d
Reference Timestamp: 3958892334.278543106 (2025-06-14T12:18:54Z)
Originator Timestamp: 3958892396.301858402 (2025-06-14T12:19:56Z)
Receive Timestamp: 3958892396.383053917 (2025-06-14T12:19:56Z)
Transmit Timestamp: 3958892463.249071196 (2025-06-14T12:21:03Z)
Originator - Receive Timestamp: +0.081195515
Originator - Transmit Timestamp: +66.947212794
22:21:03.403548 00:a2:00:b2:00:c2 > 60:be:b4:07:c6:14, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 110, id 1662, offset 0, flags [none], proto UDP (17), length 76)
216.239.35.8.123 > 144.6.175.62.123: [udp sum ok] NTPv4, Server, length 48
Leap indicator: (0), Stratum 1 (primary reference), poll 6 (64s), precision -20
Root Delay: 0.000000, Root dispersion: 0.000091, Reference-ID: GOOG
Reference Timestamp: 3958892463.322157275 (2025-06-14T12:21:03Z)
Originator Timestamp: 3958892463.249071196 (2025-06-14T12:21:03Z)
Receive Timestamp: 3958892463.322157275 (2025-06-14T12:21:03Z)
Transmit Timestamp: 3958892463.322157276 (2025-06-14T12:21:03Z)
Originator - Receive Timestamp: +0.073086079
Originator - Transmit Timestamp: +0.073086079
22:21:05.282234 60:be:b4:07:c6:14 > 00:a2:00:b2:00:c2, ethertype IPv4 (0x0800), length 90: (tos 0xb8, ttl 64, id 49125, offset 0, flags [none], proto UDP (17), length 76)
144.6.175.62.123 > 17.253.66.45.123: [bad udp cksum 0x93b8 -> 0xb597!] NTPv4, Client, length 48
Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -24
Root Delay: 0.015853, Root dispersion: 0.003860, Reference-ID: 0x11fd422d
Reference Timestamp: 3958892334.278543106 (2025-06-14T12:18:54Z)
Originator Timestamp: 3958892400.245805983 (2025-06-14T12:20:00Z)
Receive Timestamp: 3958892400.254081713 (2025-06-14T12:20:00Z)
Transmit Timestamp: 3958892465.282205074 (2025-06-14T12:21:05Z)
Originator - Receive Timestamp: +0.008275730
Originator - Transmit Timestamp: +65.036399091
22:21:05.298334 00:a2:00:b2:00:c2 > 60:be:b4:07:c6:14, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 59, id 50905, offset 0, flags [DF], proto UDP (17), length 76)
17.253.66.45.123 > 144.6.175.62.123: [udp sum ok] NTPv4, Server, length 48
Leap indicator: (0), Stratum 1 (primary reference), poll 6 (64s), precision -20
Root Delay: 0.000000, Root dispersion: 0.000213, Reference-ID: GPSs
Reference Timestamp: 3958892458.503937934 (2025-06-14T12:20:58Z)
Originator Timestamp: 3958892465.282205074 (2025-06-14T12:21:05Z)
Receive Timestamp: 3958892465.290206828 (2025-06-14T12:21:05Z)
Transmit Timestamp: 3958892465.290219375 (2025-06-14T12:21:05Z)
Originator - Receive Timestamp: +0.008001754
Originator - Transmit Timestamp: +0.008014301
22:22:02.234498 60:be:b4:07:c6:14 > 00:a2:00:b2:00:c2, ethertype IPv4 (0x0800), length 90: (tos 0xb8, ttl 64, id 55716, offset 0, flags [none], proto UDP (17), length 76)
144.6.175.62.123 > 133.243.238.163.123: [bad udp cksum 0xb425 -> 0x255c!] NTPv4, Client, length 48
Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -24
Root Delay: 0.015853, Root dispersion: 0.004714, Reference-ID: 0x11fd422d
Reference Timestamp: 3958892334.278543106 (2025-06-14T12:18:54Z)
Originator Timestamp: 3958892458.330599615 (2025-06-14T12:20:58Z)
Receive Timestamp: 3958892458.421561986 (2025-06-14T12:20:58Z)
Transmit Timestamp: 3958892522.234478725 (2025-06-14T12:22:02Z)
Originator - Receive Timestamp: +0.090962370
Originator - Transmit Timestamp: +63.903879109
22:22:02.426077 00:a2:00:b2:00:c2 > 60:be:b4:07:c6:14, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 44, id 55716, offset 0, flags [none], proto UDP (17), length 76)
133.243.238.163.123 > 144.6.175.62.123: [udp sum ok] NTPv4, Server, length 48
Leap indicator: (0), Stratum 1 (primary reference), poll 6 (64s), precision -20
Root Delay: 0.000000, Root dispersion: 0.000000, Reference-ID: NICT
Reference Timestamp: 3958892522.000000000 (2025-06-14T12:22:02Z)
Originator Timestamp: 3958892522.234478725 (2025-06-14T12:22:02Z)
Receive Timestamp: 3958892522.335119751 (2025-06-14T12:22:02Z)
Transmit Timestamp: 3958892522.335120567 (2025-06-14T12:22:02Z)
Originator - Receive Timestamp: +0.100641026
Originator - Transmit Timestamp: +0.100641842
22:22:05.286725 60:be:b4:07:c6:14 > 00:a2:00:b2:00:c2, ethertype IPv4 (0x0800), length 90: (tos 0xb8, ttl 64, id 12175, offset 0, flags [none], proto UDP (17), length 76)
144.6.175.62.123 > 202.142.142.241.123: [bad udp cksum 0x990e -> 0xda3f!] NTPv4, Client, length 48
Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -24
Root Delay: 0.015853, Root dispersion: 0.004760, Reference-ID: 0x11fd422d
Reference Timestamp: 3958892334.278543106 (2025-06-14T12:18:54Z)
Originator Timestamp: 3958892458.112651683 (2025-06-14T12:20:58Z)
Receive Timestamp: 3958892458.259548812 (2025-06-14T12:20:58Z)
Transmit Timestamp: 3958892525.286692134 (2025-06-14T12:22:05Z)
Originator - Receive Timestamp: +0.146897129
Originator - Transmit Timestamp: +67.174040451
22:22:05.316314 00:a2:00:b2:00:c2 > 60:be:b4:07:c6:14, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 61, id 20583, offset 0, flags [DF], proto UDP (17), length 76)
202.142.142.241.123 > 144.6.175.62.123: [udp sum ok] NTPv4, Server, length 48
Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -24
Root Delay: 0.037506, Root dispersion: 0.030227, Reference-ID: 0x825fb350
Reference Timestamp: 3958891648.326188020 (2025-06-14T12:07:28Z)
Originator Timestamp: 3958892525.286692134 (2025-06-14T12:22:05Z)
Receive Timestamp: 3958892525.169359020 (2025-06-14T12:22:05Z)
Transmit Timestamp: 3958892525.169375177 (2025-06-14T12:22:05Z)
Originator - Receive Timestamp: -0.117333114
Originator - Transmit Timestamp: -0.117316956
22:22:09.233533 60:be:b4:07:c6:14 > 00:a2:00:b2:00:c2, ethertype IPv4 (0x0800), length 90: (tos 0xb8, ttl 64, id 59968, offset 0, flags [none], proto UDP (17), length 76)
144.6.175.62.123 > 119.18.32.153.123: [bad udp cksum 0xd739 -> 0x07b2!] NTPv4, Client, length 48
Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -24
Root Delay: 0.015853, Root dispersion: 0.004821, Reference-ID: 0x11fd422d
Reference Timestamp: 3958892334.278543106 (2025-06-14T12:18:54Z)
Originator Timestamp: 3958892462.248759762 (2025-06-14T12:21:02Z)
Receive Timestamp: 3958892462.256305224 (2025-06-14T12:21:02Z)
Transmit Timestamp: 3958892529.233501405 (2025-06-14T12:22:09Z)
Originator - Receive Timestamp: +0.007545461
Originator - Transmit Timestamp: +66.984741642
22:22:09.233551 60:be:b4:07:c6:14 > 00:a2:00:b2:00:c2, ethertype IPv4 (0x0800), length 90: (tos 0xb8, ttl 64, id 14918, offset 0, flags [none], proto UDP (17), length 76)
144.6.175.62.123 > 216.239.35.8.123: [bad udp cksum 0x3b86 -> 0x9e6f!] NTPv4, Client, length 48
Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -24
Root Delay: 0.015853, Root dispersion: 0.004821, Reference-ID: 0x11fd422d
Reference Timestamp: 3958892334.278543106 (2025-06-14T12:18:54Z)
Originator Timestamp: 3958892463.322157276 (2025-06-14T12:21:03Z)
Receive Timestamp: 3958892463.403602689 (2025-06-14T12:21:03Z)
Transmit Timestamp: 3958892529.233536997 (2025-06-14T12:22:09Z)
Originator - Receive Timestamp: +0.081445412
Originator - Transmit Timestamp: +65.911379721
22:22:09.249623 00:a2:00:b2:00:c2 > 60:be:b4:07:c6:14, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 62, id 14995, offset 0, flags [DF], proto UDP (17), length 76)
119.18.32.153.123 > 144.6.175.62.123: [udp sum ok] NTPv4, Server, length 48
Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -23
Root Delay: 0.005630, Root dispersion: 0.032546, Reference-ID: 0xcb2353f2
Reference Timestamp: 3958891441.573316619 (2025-06-14T12:04:01Z)
Originator Timestamp: 3958892529.233501405 (2025-06-14T12:22:09Z)
Receive Timestamp: 3958892529.241532230 (2025-06-14T12:22:09Z)
Transmit Timestamp: 3958892529.241620549 (2025-06-14T12:22:09Z)
Originator - Receive Timestamp: +0.008030824
Originator - Transmit Timestamp: +0.008119143
22:22:09.387909 00:a2:00:b2:00:c2 > 60:be:b4:07:c6:14, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 110, id 37264, offset 0, flags [none], proto UDP (17), length 76)
216.239.35.8.123 > 144.6.175.62.123: [udp sum ok] NTPv4, Server, length 48
Leap indicator: (0), Stratum 1 (primary reference), poll 6 (64s), precision -20
Root Delay: 0.000000, Root dispersion: 0.000091, Reference-ID: GOOG
Reference Timestamp: 3958892529.306483583 (2025-06-14T12:22:09Z)
Originator Timestamp: 3958892529.233536997 (2025-06-14T12:22:09Z)
Receive Timestamp: 3958892529.306483583 (2025-06-14T12:22:09Z)
Transmit Timestamp: 3958892529.306483584 (2025-06-14T12:22:09Z)
Originator - Receive Timestamp: +0.072946586
Originator - Transmit Timestamp: +0.072946587
22:22:11.234463 60:be:b4:07:c6:14 > 00:a2:00:b2:00:c2, ethertype IPv4 (0x0800), length 90: (tos 0xb8, ttl 64, id 7726, offset 0, flags [none], proto UDP (17), length 76)
144.6.175.62.123 > 17.253.66.45.123: [bad udp cksum 0x93b8 -> 0xb287!] NTPv4, Client, length 48
Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -24
Root Delay: 0.015853, Root dispersion: 0.004852, Reference-ID: 0x11fd422d
Reference Timestamp: 3958892334.278543106 (2025-06-14T12:18:54Z)
Originator Timestamp: 3958892465.290219375 (2025-06-14T12:21:05Z)
Receive Timestamp: 3958892465.298354612 (2025-06-14T12:21:05Z)
Transmit Timestamp: 3958892531.234427093 (2025-06-14T12:22:11Z)
Originator - Receive Timestamp: +0.008135237
Originator - Transmit Timestamp: +65.944207717
22:22:11.250883 00:a2:00:b2:00:c2 > 60:be:b4:07:c6:14, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 59, id 17627, offset 0, flags [DF], proto UDP (17), length 76)
17.253.66.45.123 > 144.6.175.62.123: [udp sum ok] NTPv4, Server, length 48
Leap indicator: (0), Stratum 1 (primary reference), poll 6 (64s), precision -20
Root Delay: 0.000000, Root dispersion: 0.000122, Reference-ID: GPSs
Reference Timestamp: 3958892530.503937200 (2025-06-14T12:22:10Z)
Originator Timestamp: 3958892531.234427093 (2025-06-14T12:22:11Z)
Receive Timestamp: 3958892531.243000441 (2025-06-14T12:22:11Z)
Transmit Timestamp: 3958892531.243016021 (2025-06-14T12:22:11Z)
Originator - Receive Timestamp: +0.008573348
Originator - Transmit Timestamp: +0.008588928
22:23:08.229657 60:be:b4:07:c6:14 > 00:a2:00:b2:00:c2, ethertype IPv4 (0x0800), length 90: (tos 0xb8, ttl 64, id 21750, offset 0, flags [none], proto UDP (17), length 76)
144.6.175.62.123 > 133.243.238.163.123: [bad udp cksum 0xb425 -> 0x0b5d!] NTPv4, Client, length 48
Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -24
Root Delay: 0.015853, Root dispersion: 0.005706, Reference-ID: 0x11fd422d
Reference Timestamp: 3958892334.278543106 (2025-06-14T12:18:54Z)
Originator Timestamp: 3958892522.335120567 (2025-06-14T12:22:02Z)
Receive Timestamp: 3958892522.426089341 (2025-06-14T12:22:02Z)
Transmit Timestamp: 3958892588.229612751 (2025-06-14T12:23:08Z)
Originator - Receive Timestamp: +0.090968774
Originator - Transmit Timestamp: +65.894492184
22:23:08.421862 00:a2:00:b2:00:c2 > 60:be:b4:07:c6:14, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 44, id 21750, offset 0, flags [none], proto UDP (17), length 76)
133.243.238.163.123 > 144.6.175.62.123: [udp sum ok] NTPv4, Server, length 48
Leap indicator: (0), Stratum 1 (primary reference), poll 6 (64s), precision -20
Root Delay: 0.000000, Root dispersion: 0.000000, Reference-ID: NICT
Reference Timestamp: 3958892588.000000000 (2025-06-14T12:23:08Z)
Originator Timestamp: 3958892588.229612751 (2025-06-14T12:23:08Z)
Receive Timestamp: 3958892588.330715191 (2025-06-14T12:23:08Z)
Transmit Timestamp: 3958892588.330716011 (2025-06-14T12:23:08Z)
Originator - Receive Timestamp: +0.101102439
Originator - Transmit Timestamp: +0.101103259
22:23:10.234896 60:be:b4:07:c6:14 > 00:a2:00:b2:00:c2, ethertype IPv4 (0x0800), length 90: (tos 0xb8, ttl 64, id 65244, offset 0, flags [none], proto UDP (17), length 76)
144.6.175.62.123 > 202.142.142.241.123: [bad udp cksum 0x990e -> 0x9657!] NTPv4, Client, length 48
Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -24
Root Delay: 0.015853, Root dispersion: 0.005737, Reference-ID: 0x11fd422d
Reference Timestamp: 3958892334.278543106 (2025-06-14T12:18:54Z)
Originator Timestamp: 3958892525.169375177 (2025-06-14T12:22:05Z)
Receive Timestamp: 3958892525.316333771 (2025-06-14T12:22:05Z)
Transmit Timestamp: 3958892590.234847492 (2025-06-14T12:23:10Z)
Originator - Receive Timestamp: +0.146958594
Originator - Transmit Timestamp: +65.065472315
22:23:10.264576 00:a2:00:b2:00:c2 > 60:be:b4:07:c6:14, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 61, id 32639, offset 0, flags [DF], proto UDP (17), length 76)
202.142.142.241.123 > 144.6.175.62.123: [udp sum ok] NTPv4, Server, length 48
Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -24
Root Delay: 0.037506, Root dispersion: 0.031204, Reference-ID: 0x825fb350
Reference Timestamp: 3958891648.326188020 (2025-06-14T12:07:28Z)
Originator Timestamp: 3958892590.234847492 (2025-06-14T12:23:10Z)
Receive Timestamp: 3958892590.117834528 (2025-06-14T12:23:10Z)
Transmit Timestamp: 3958892590.117907373 (2025-06-14T12:23:10Z)
Originator - Receive Timestamp: -0.117012964
Originator - Transmit Timestamp: -0.116940119
22:23:15.232115 60:be:b4:07:c6:14 > 00:a2:00:b2:00:c2, ethertype IPv4 (0x0800), length 90: (tos 0xb8, ttl 64, id 2469, offset 0, flags [none], proto UDP (17), length 76)
144.6.175.62.123 > 216.239.35.8.123: [bad udp cksum 0x3b86 -> 0x3d13!] NTPv4, Client, length 48
Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -24
Root Delay: 0.015853, Root dispersion: 0.005813, Reference-ID: 0x11fd422d
Reference Timestamp: 3958892334.278543106 (2025-06-14T12:18:54Z)
Originator Timestamp: 3958892529.306483584 (2025-06-14T12:22:09Z)
Receive Timestamp: 3958892529.387931985 (2025-06-14T12:22:09Z)
Transmit Timestamp: 3958892595.232065980 (2025-06-14T12:23:15Z)
Originator - Receive Timestamp: +0.081448401
Originator - Transmit Timestamp: +65.925582395
22:23:15.232130 60:be:b4:07:c6:14 > 00:a2:00:b2:00:c2, ethertype IPv4 (0x0800), length 90: (tos 0xb8, ttl 64, id 40710, offset 0, flags [none], proto UDP (17), length 76)
144.6.175.62.123 > 17.253.66.45.123: [bad udp cksum 0x93b8 -> 0xd384!] NTPv4, Client, length 48
Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -24
Root Delay: 0.015853, Root dispersion: 0.005813, Reference-ID: 0x11fd422d
Reference Timestamp: 3958892334.278543106 (2025-06-14T12:18:54Z)
Originator Timestamp: 3958892531.243016021 (2025-06-14T12:22:11Z)
Receive Timestamp: 3958892531.250924171 (2025-06-14T12:22:11Z)
Transmit Timestamp: 3958892595.232121255 (2025-06-14T12:23:15Z)
Originator - Receive Timestamp: +0.007908149
Originator - Transmit Timestamp: +63.989105233
22:23:15.248637 00:a2:00:b2:00:c2 > 60:be:b4:07:c6:14, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 59, id 49510, offset 0, flags [DF], proto UDP (17), length 76)
17.253.66.45.123 > 144.6.175.62.123: [udp sum ok] NTPv4, Server, length 48
Leap indicator: (0), Stratum 1 (primary reference), poll 6 (64s), precision -20
Root Delay: 0.000000, Root dispersion: 0.000122, Reference-ID: GPSs
Reference Timestamp: 3958892594.503937293 (2025-06-14T12:23:14Z)
Originator Timestamp: 3958892595.232121255 (2025-06-14T12:23:15Z)
Receive Timestamp: 3958892595.240540413 (2025-06-14T12:23:15Z)
Transmit Timestamp: 3958892595.240552865 (2025-06-14T12:23:15Z)
Originator - Receive Timestamp: +0.008419158
Originator - Transmit Timestamp: +0.008431610
22:23:15.387305 00:a2:00:b2:00:c2 > 60:be:b4:07:c6:14, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 110, id 11160, offset 0, flags [none], proto UDP (17), length 76)
216.239.35.8.123 > 144.6.175.62.123: [udp sum ok] NTPv4, Server, length 48
Leap indicator: (0), Stratum 1 (primary reference), poll 6 (64s), precision -20
Root Delay: 0.000000, Root dispersion: 0.000091, Reference-ID: GOOG
Reference Timestamp: 3958892595.305778679 (2025-06-14T12:23:15Z)
Originator Timestamp: 3958892595.232065980 (2025-06-14T12:23:15Z)
Receive Timestamp: 3958892595.305778679 (2025-06-14T12:23:15Z)
Transmit Timestamp: 3958892595.305778680 (2025-06-14T12:23:15Z)
Originator - Receive Timestamp: +0.073712699
Originator - Transmit Timestamp: +0.073712700
22:23:16.238779 60:be:b4:07:c6:14 > 00:a2:00:b2:00:c2, ethertype IPv4 (0x0800), length 90: (tos 0xb8, ttl 64, id 55769, offset 0, flags [none], proto UDP (17), length 76)
144.6.175.62.123 > 119.18.32.153.123: [bad udp cksum 0xd739 -> 0x7d66!] NTPv4, Client, length 48
Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -24
Root Delay: 0.015853, Root dispersion: 0.005828, Reference-ID: 0x11fd422d
Reference Timestamp: 3958892334.278543106 (2025-06-14T12:18:54Z)
Originator Timestamp: 3958892529.241620549 (2025-06-14T12:22:09Z)
Receive Timestamp: 3958892529.249632371 (2025-06-14T12:22:09Z)
Transmit Timestamp: 3958892596.238761603 (2025-06-14T12:23:16Z)
Originator - Receive Timestamp: +0.008011822
Originator - Transmit Timestamp: +66.997141053
22:23:16.255205 00:a2:00:b2:00:c2 > 60:be:b4:07:c6:14, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 62, id 30504, offset 0, flags [DF], proto UDP (17), length 76)
119.18.32.153.123 > 144.6.175.62.123: [udp sum ok] NTPv4, Server, length 48
Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -23
Root Delay: 0.005630, Root dispersion: 0.033538, Reference-ID: 0xcb2353f2
Reference Timestamp: 3958891441.573316619 (2025-06-14T12:04:01Z)
Originator Timestamp: 3958892596.238761603 (2025-06-14T12:23:16Z)
Receive Timestamp: 3958892596.247557033 (2025-06-14T12:23:16Z)
Transmit Timestamp: 3958892596.247659775 (2025-06-14T12:23:16Z)
Originator - Receive Timestamp: +0.008795430
Originator - Transmit Timestamp: +0.008898172
22:24:15.237591 60:be:b4:07:c6:14 > 00:a2:00:b2:00:c2, ethertype IPv4 (0x0800), length 90: (tos 0xb8, ttl 64, id 62000, offset 0, flags [none], proto UDP (17), length 76)
144.6.175.62.123 > 133.243.238.163.123: [bad udp cksum 0xb425 -> 0x6068!] NTPv4, Client, length 48
Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -24
Root Delay: 0.015853, Root dispersion: 0.006713, Reference-ID: 0x11fd422d
Reference Timestamp: 3958892334.278543106 (2025-06-14T12:18:54Z)
Originator Timestamp: 3958892588.330716011 (2025-06-14T12:23:08Z)
Receive Timestamp: 3958892588.421871340 (2025-06-14T12:23:08Z)
Transmit Timestamp: 3958892655.237558802 (2025-06-14T12:24:15Z)
Originator - Receive Timestamp: +0.091155328
Originator - Transmit Timestamp: +66.906842790 -
@admacdo ok this doesn't make much sense
Receive Timestamp: 3958892019.237000500 (2025-06-14T12:13:39Z) Transmit Timestamp: 3958892019.237000500 (2025-06-14T12:13:39Z) Originator - Receive Timestamp: -0.003453436 Originator - Transmit Timestamp: -0.003453436why in your server response are these all exactly the same numbers.. They should have differences.
they are different when you talk to different outside servers.. But the answers from your internal server the numbers are exactly the same.
192.168.25.250.123 > 192.168.25.254.123: [udp sum ok] NTPv4, Server, length 48 Leap indicator: (0), Stratum 1 (primary reference), poll 0 (1s), precision -18 Root Delay: 0.000000, Root dispersion: 0.000000, Reference-ID: PPS^@ Reference Timestamp: 3958892341.000000000 (2025-06-14T12:19:01Z) Originator Timestamp: 3958892341.243755483 (2025-06-14T12:19:01Z) Receive Timestamp: 3958892341.239999999 (2025-06-14T12:19:01Z) Transmit Timestamp: 3958892341.239999999 (2025-06-14T12:19:01Z) Originator - Receive Timestamp: -0.003755483 Originator - Transmit Timestamp: -0.003755483that doesn't make sense.. There should be some processing time.. even if it was 0.000000001
edit: here is my pfsense talking to my pi ntp server..
09:20:38.245061 00:08:a2:0c:e6:21 > b8:27:eb:31:70:ab, ethertype IPv4 (0x0800), length 90: (tos 0xb8, ttl 64, id 53402, offset 0, flags [none], proto UDP (17), length 76) 192.168.3.253.123 > 192.168.3.32.123: [bad udp cksum 0x88b7 -> 0x1015!] NTPv4, Client, length 48 Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -22 Root Delay: 0.000579, Root dispersion: 0.008697, Reference-ID: 0xc0a80320 Reference Timestamp: 3958899176.245755911 (2025-06-14T14:12:56Z) Originator Timestamp: 3958899571.245464583 (2025-06-14T14:19:31Z) Receive Timestamp: 3958899571.245779985 (2025-06-14T14:19:31Z) Transmit Timestamp: 3958899638.244990223 (2025-06-14T14:20:38Z) Originator - Receive Timestamp: +0.000315401 Originator - Transmit Timestamp: +66.999525640 09:20:38.245749 b8:27:eb:31:70:ab > 00:08:a2:0c:e6:21, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 64, id 43159, offset 0, flags [DF], proto UDP (17), length 76) 192.168.3.32.123 > 192.168.3.253.123: [udp sum ok] NTPv4, Server, length 48 Leap indicator: (0), Stratum 1 (primary reference), poll 6 (64s), precision -24 Root Delay: 0.000015, Root dispersion: 0.000030, Reference-ID: PPS^@ Reference Timestamp: 3958899620.546711021 (2025-06-14T14:20:20Z) Originator Timestamp: 3958899638.244990223 (2025-06-14T14:20:38Z) Receive Timestamp: 3958899638.245283344 (2025-06-14T14:20:38Z) Transmit Timestamp: 3958899638.245454933 (2025-06-14T14:20:38Z) Originator - Receive Timestamp: +0.000293120 Originator - Transmit Timestamp: +0.000464709 09:21:43.245041 00:08:a2:0c:e6:21 > b8:27:eb:31:70:ab, ethertype IPv4 (0x0800), length 90: (tos 0xb8, ttl 64, id 25952, offset 0, flags [none], proto UDP (17), length 76) 192.168.3.253.123 > 192.168.3.32.123: [bad udp cksum 0x88b7 -> 0x4b0a!] NTPv4, Client, length 48 Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -22 Root Delay: 0.000579, Root dispersion: 0.009658, Reference-ID: 0xc0a80320 Reference Timestamp: 3958899176.245755911 (2025-06-14T14:12:56Z) Originator Timestamp: 3958899638.245454933 (2025-06-14T14:20:38Z) Receive Timestamp: 3958899638.245768187 (2025-06-14T14:20:38Z) Transmit Timestamp: 3958899703.244977578 (2025-06-14T14:21:43Z) Originator - Receive Timestamp: +0.000313254 Originator - Transmit Timestamp: +64.999522645 09:21:43.245743 b8:27:eb:31:70:ab > 00:08:a2:0c:e6:21, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 64, id 43614, offset 0, flags [DF], proto UDP (17), length 76) 192.168.3.32.123 > 192.168.3.253.123: [udp sum ok] NTPv4, Server, length 48 Leap indicator: (0), Stratum 1 (primary reference), poll 6 (64s), precision -24 Root Delay: 0.000015, Root dispersion: 0.000030, Reference-ID: PPS^@ Reference Timestamp: 3958899683.138522683 (2025-06-14T14:21:23Z) Originator Timestamp: 3958899703.244977578 (2025-06-14T14:21:43Z) Receive Timestamp: 3958899703.245263460 (2025-06-14T14:21:43Z) Transmit Timestamp: 3958899703.245442833 (2025-06-14T14:21:43Z) Originator - Receive Timestamp: +0.000285881 Originator - Transmit Timestamp: +0.000465254 09:22:48.245036 00:08:a2:0c:e6:21 > b8:27:eb:31:70:ab, ethertype IPv4 (0x0800), length 90: (tos 0xb8, ttl 64, id 46500, offset 0, flags [none], proto UDP (17), length 76) 192.168.3.253.123 > 192.168.3.32.123: [bad udp cksum 0x88b7 -> 0x7eb2!] NTPv4, Client, length 48 Leap indicator: (0), Stratum 2 (secondary reference), poll 6 (64s), precision -22 Root Delay: 0.000579, Root dispersion: 0.004776, Reference-ID: 0xc0a80320 Reference Timestamp: 3958899703.245761089 (2025-06-14T14:21:43Z) Originator Timestamp: 3958899703.245442833 (2025-06-14T14:21:43Z) Receive Timestamp: 3958899703.245761089 (2025-06-14T14:21:43Z) Transmit Timestamp: 3958899768.244973168 (2025-06-14T14:22:48Z) Originator - Receive Timestamp: +0.000318255 Originator - Transmit Timestamp: +64.999530334 09:22:48.245710 b8:27:eb:31:70:ab > 00:08:a2:0c:e6:21, ethertype IPv4 (0x0800), length 90: (tos 0x0, ttl 64, id 57029, offset 0, flags [DF], proto UDP (17), length 76) 192.168.3.32.123 > 192.168.3.253.123: [udp sum ok] NTPv4, Server, length 48 Leap indicator: (0), Stratum 1 (primary reference), poll 6 (64s), precision -24 Root Delay: 0.000015, Root dispersion: 0.000030, Reference-ID: PPS^@ Reference Timestamp: 3958899748.174415440 (2025-06-14T14:22:28Z) Originator Timestamp: 3958899768.244973168 (2025-06-14T14:22:48Z) Receive Timestamp: 3958899768.245263888 (2025-06-14T14:22:48Z) Transmit Timestamp: 3958899768.245429649 (2025-06-14T14:22:48Z) Originator - Receive Timestamp: +0.000290720 Originator - Transmit Timestamp: +0.000456481Makes no sense the answer from your ntp server that there is no difference in those numbers..
Also this makes no sense either.. So client talking to the ntp server, gets its answer in .000137 seconds.. So .1 of a ms.. Is your ntp server on the same VM host as your pfsense? How are you sending traffic over ethernet to some other device and getting an answer in .1 of a ms?
Even the best of networks your going to be looking at like .5 of a ms..
so your client (pfsense) talking to your ntp server sent a query over the wire, and got its response in 137 micro seconds.. And your ntp server took not even 1 nano second to process it? Something not right there..
-
Hmm, interesting. I understand it's probably a very good ntp server but....
-
@stephenw10 yeah something is screwy.. Did he say his other client set time off this.. But are they using actual ntp, or just a sntp/timedate sort of client? this just pulls the time at that moment - it doesn't do any sort of adjustments on the client clock to keep them in sync - and doubt it cares about these numbers.. But I know a normal ntp client uses these numbers in calculating delay, etc. Maybe those numbers being the same is throwing off the calculation so ntp doesn't accept the response?
All I know is it seems odd that the ntp server would have exact numbers like that.
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Woah. This is what happens when you post when you really want to go to bed. I did a quick look for errors and totally ignored the numbers.
Some of the clients around the house are using SNTP because they're dumb boxes, but the main windows machines are running with a real NTP client from Meinberg and they're calculating the delay, offset and jitter with no issues. I'll do some more captures later and pay more attention. It's new car day, so I've got distractions .I may have to resurrect the Pi NTP servers and see what happens when they're supplying data. About five years ago, I had five of them with various GPS input, all comparing against each other to test peering and delay interaction.
There are no VM's in the house at this point. -
@stephenw10
Yeah, no NTP servers are that good. Even the 10 gigabit ones with reflectors..
