# \#monitoring **URL:** https://community.ntppool.org/tag/monitoring/1.md [Latest](https://community.ntppool.org/latest.md) · [Categories](https://community.ntppool.org/categories.md) · [Tags](https://community.ntppool.org/tags.md) --- ## [Monitoring agent for FreeBSD](https://community.ntppool.org/t/monitoring-agent-for-freebsd/4243)
**Author:** [@scamp](https://community.ntppool.org/u/scamp)\ **Replies:** 16\ **Last updated:** [September 4, 2026, 12:24pm UTC](https://community.ntppool.org/t/monitoring-agent-for-freebsd/4243 "2026-09-04T12:24:21Z")
Hi, How do I install ntppool-agent in FreeBSD? Where can I find the packages for that OS? https://builds.ntppool.dev/repo/ page seems to contain instructions for Linux only. --- ## [Client distribution chart shows 0.000 even with longterm score 20](https://community.ntppool.org/t/client-distribution-chart-shows-0-000-even-with-longterm-score-20/4570)
**Author:** [@meszaros.norbert](https://community.ntppool.org/u/meszaros.norbert)\ **Replies:** 7\ **Last updated:** [July 27, 2026, 12:43pm UTC](https://community.ntppool.org/t/client-distribution-chart-shows-0-000-even-with-longterm-score-20/4570 "2026-07-27T12:43:05Z")
hi everyone, for some days now I have noticed, that my client distribution shows absolute zero even if my score is 20 from all relevant monitors. Have I missed something? Or do I need to do some changes in settings? Tha… --- ## [Documentation: time.orlinum.fr](https://community.ntppool.org/t/documentation-time-orlinum-fr/4593)
**Author:** [@Orlinum](https://community.ntppool.org/u/Orlinum)\ **Replies:** 1\ **Last updated:** [July 26, 2026, 2:42pm UTC](https://community.ntppool.org/t/documentation-time-orlinum-fr/4593 "2026-07-26T14:42:32Z")
Hi, As a follow-up to my previous post introducing myself to the NTP Pool (Hello, I am Orlinum. Nice to meet you ...), I am sharing the documentation for the Stratum 1 node time.orlinum.fr. Available at: https://doc.ti… --- ## [Puzzling Rate Limiting for Some Monitors](https://community.ntppool.org/t/puzzling-rate-limiting-for-some-monitors/4569)
**Author:** [@Kets\_One](https://community.ntppool.org/u/Kets_One)\ **Replies:** 20\ **Last updated:** [July 13, 2026, 8:22pm UTC](https://community.ntppool.org/t/puzzling-rate-limiting-for-some-monitors/4569 "2026-07-13T20:22:14Z")
Hi all, I’ve been facing a puzzling issue with rate limiting for which i hope you could assist in understanding and fixing. I run a number of NTP servers (IPv6-only) in the pool on various devices. However, some monit… --- ## [Running ntppool-agent on the same host as my pool server - conflict?](https://community.ntppool.org/t/running-ntppool-agent-on-the-same-host-as-my-pool-server-conflict/4543)
**Author:** [@StrawberryMew](https://community.ntppool.org/u/StrawberryMew)\ **Replies:** 7\ **Last updated:** [June 10, 2026, 4:41pm UTC](https://community.ntppool.org/t/running-ntppool-agent-on-the-same-host-as-my-pool-server-conflict/4543 "2026-06-10T16:41:23Z")
I’m considering running the ntppool-agent monitor on the same host as my pool server (smolnut - stratum 1 GPS PPS). Before I do, I wanted to check whether this causes any issues. My concern: if the monitor probes pool s… --- ## [NTPPOOL agent can't run inside docker container?](https://community.ntppool.org/t/ntppool-agent-cant-run-inside-docker-container/4479)
**Author:** [@falciloid](https://community.ntppool.org/u/falciloid)\ **Replies:** 3\ **Last updated:** [June 4, 2026, 5:35am UTC](https://community.ntppool.org/t/ntppool-agent-cant-run-inside-docker-container/4479 "2026-06-04T05:35:43Z")
Hello. I run NTP servers on RouterOS for a few years and now I gotta try to add monitors. Most staple place do deploy monitor that I have for now it’s a debian system inside container on my main RouterOS. I try, but I ca… --- ## [Issue with registration of a test NTP Pool Agent version v4.1.4](https://community.ntppool.org/t/issue-with-registration-of-a-test-ntp-pool-agent-version-v4-1-4/4365)
**Author:** [@NTPman](https://community.ntppool.org/u/NTPman)\ **Replies:** 11\ **Last updated:** [June 3, 2026, 11:30am UTC](https://community.ntppool.org/t/issue-with-registration-of-a-test-ntp-pool-agent-version-v4-1-4/4365 "2026-06-03T11:30:07Z")
My issue is on aarch64, Raspberry PI 4 with Tumbleweed as OS, but I do not think that matters. Seting-up a new test monitor, sudo journalctl -u ntppool-agent@\\\* -f gives: Apr 24 08:44:40 tumbleweed.home ntppool-agent\[5… --- ## [New Server Add issue](https://community.ntppool.org/t/new-server-add-issue/4380)
**Author:** [@mehedims](https://community.ntppool.org/u/mehedims)\ **Replies:** 11\ **Last updated:** [May 11, 2026, 1:35pm UTC](https://community.ntppool.org/t/new-server-add-issue/4380 "2026-05-11T13:35:39Z")
Hello, am trying to add new 2-server in the pool . but it showing only Could not check NTP status. My time server is work without issue, my location is Bangladesh. how i fix it? --- ## [Bad score (negative) from just one monitor](https://community.ntppool.org/t/bad-score-negative-from-just-one-monitor/4379)
**Author:** [@Wokkocher](https://community.ntppool.org/u/Wokkocher)\ **Replies:** 3\ **Last updated:** [April 27, 2026, 8:22pm UTC](https://community.ntppool.org/t/bad-score-negative-from-just-one-monitor/4379 "2026-04-27T20:22:48Z")
Hello everyone, I am running this server. It is a little router running openwrt and chrony on a regular customer at home connection with a static IPv6 adress. It is set to 6 mb/s, because my main router (provided by my … --- ## [Twtpe3-2kg9ezv -100 for days on end](https://community.ntppool.org/t/twtpe3-2kg9ezv-100-for-days-on-end/4246)
**Author:** [@theking2](https://community.ntppool.org/u/theking2)\ **Replies:** 19\ **Last updated:** [March 23, 2026, 8:14am UTC](https://community.ntppool.org/t/twtpe3-2kg9ezv-100-for-days-on-end/4246 "2026-03-23T08:14:07Z")
twtpe3-2kg9ezv has been reporting -100 for almost a week now. Is this (time2.google.com) server no longer active? --- ## [How to get Chrony dead right](https://community.ntppool.org/t/how-to-get-chrony-dead-right/4241)
**Author:** [@Bas](https://community.ntppool.org/u/Bas)\ **Replies:** 6\ **Last updated:** [February 12, 2026, 3:52pm UTC](https://community.ntppool.org/t/how-to-get-chrony-dead-right/4241 "2026-02-12T15:52:20Z")
Did anybody see this? Why did it get so stable? I do not know if others tried this. But I found that timedatectl was making a mess of things. This caused it: systemctl disable --now systemd-timesyncd then system… --- ## [Faster than a speeding photon](https://community.ntppool.org/t/faster-than-a-speeding-photon/4225)
**Author:** [@davehart](https://community.ntppool.org/u/davehart)\ **Replies:** 1\ **Last updated:** [January 11, 2026, 5:12pm UTC](https://community.ntppool.org/t/faster-than-a-speeding-photon/4225 "2026-01-11T17:12:50Z")
I’m seeing incredible latencies shown for various monitors for several of my pool servers on the US East coast, such as low 40s to multiple monitors in Russia, and about 70 msec to several Taiwan monitors. Those servers… --- ## [More precise (sensible, sensitive) server monitoring score](https://community.ntppool.org/t/more-precise-sensible-sensitive-server-monitoring-score/3725)
**Author:** [@NTPman](https://community.ntppool.org/u/NTPman)\ **Replies:** 55\ **Last updated:** [January 10, 2026, 3:54pm UTC](https://community.ntppool.org/t/more-precise-sensible-sensitive-server-monitoring-score/3725 "2026-01-10T15:54:15Z")
I am wondering does this retry logic still make sense? With the new multi-location monitoring system in place, servers get very good scores in general. We may want more precise measurement, even knowing about one packe… --- ## [No active nor testing entries](https://community.ntppool.org/t/no-active-nor-testing-entries/4211)
**Author:** [@pakal.org](https://community.ntppool.org/u/pakal.org)\ **Replies:** 6\ **Last updated:** [January 6, 2026, 6:39pm UTC](https://community.ntppool.org/t/no-active-nor-testing-entries/4211 "2026-01-06T18:39:37Z")
Hello, I don’t see any “active” or “testing” entries on my server, is it normal ? is it really used in the pool ? Thanks Pascal --- ## [Monitor scoring glitch when ntpd isn't listening?](https://community.ntppool.org/t/monitor-scoring-glitch-when-ntpd-isnt-listening/4187)
**Author:** [@davehart](https://community.ntppool.org/u/davehart)\ **Replies:** 13\ **Last updated:** [December 25, 2025, 4:38pm UTC](https://community.ntppool.org/t/monitor-scoring-glitch-when-ntpd-isnt-listening/4187 "2025-12-25T16:38:20Z")
I futzed an update of ntpd to a development testing version on t2.davehart.net and noticed what appears to be a bug in the recentmedian scoring. After bringing ntpd back up, I noticed while all the active monitors had s… --- ## [Site to evaluate NTP servers](https://community.ntppool.org/t/site-to-evaluate-ntp-servers/3931)
**Author:** [@giovane](https://community.ntppool.org/u/giovane)\ **Replies:** 29\ **Last updated:** [October 30, 2025, 1:49pm UTC](https://community.ntppool.org/t/site-to-evaluate-ntp-servers/3931 "2025-10-30T13:49:24Z")
Folks, My students at TU Delft have developed a website as part of the course which evaluates the accuracy of NTP servers. We are currently on beta phase – so any feedback is more than welcome What does it do? It … --- ## [Best Rack Server Configurations for NTP Server Use](https://community.ntppool.org/t/best-rack-server-configurations-for-ntp-server-use/4120)
**Author:** [@arthurleo](https://community.ntppool.org/u/arthurleo)\ **Replies:** 6\ **Last updated:** [October 29, 2025, 2:30am UTC](https://community.ntppool.org/t/best-rack-server-configurations-for-ntp-server-use/4120 "2025-10-29T02:30:37Z")
Hi everyone, I’m planning to set up a rack server to contribute to the NTP pool and would love to get some input on the best configurations for a reliable and efficient NTP server. I know that NTP servers need to prior… --- ## [Personnal project : chrony + network monitoring dashboard lightweight](https://community.ntppool.org/t/personnal-project-chrony-network-monitoring-dashboard-lightweight/3860)
**Author:** [@Impish](https://community.ntppool.org/u/Impish)\ **Replies:** 29\ **Last updated:** [August 30, 2025, 11:44pm UTC](https://community.ntppool.org/t/personnal-project-chrony-network-monitoring-dashboard-lightweight/3860 "2025-08-30T23:44:31Z")
Hello, I’d like to share a small open-source personal project, a script I developed to solve a simple problem: I needed to monitor my Chrony server running on a small machine without consuming a lot of resources. So i … --- ## [Monitoring metrics](https://community.ntppool.org/t/monitoring-metrics/4003)
**Author:** [@john1](https://community.ntppool.org/u/john1)\ **Replies:** 17\ **Last updated:** [August 13, 2025, 7:22am UTC](https://community.ntppool.org/t/monitoring-metrics/4003 "2025-08-13T07:22:30Z")
How are the totals in the light blue calculated? I have only the two monitors and if I add their reported 1 hour tests/min, I get 13.1 + 9.6 = 22.7, which is roughly half of what is reported in the blue block. The 24 hou… --- ## [Firewall Blocking an NTP Server from pool.ntp.org - Rogue NTP Server?](https://community.ntppool.org/t/firewall-blocking-an-ntp-server-from-pool-ntp-org-rogue-ntp-server/3873)
**Author:** [@Otto](https://community.ntppool.org/u/Otto)\ **Replies:** 5\ **Last updated:** [June 25, 2025, 11:15am UTC](https://community.ntppool.org/t/firewall-blocking-an-ntp-server-from-pool-ntp-org-rogue-ntp-server/3873 "2025-06-25T11:15:57Z")
Hello everyone, I’ve noticed that my Ubiquiti UDM PRO Max, using its default firewall settings, is blocking an IP address from the pool.ntp.org NTP server pool. I’m unsure if this is a rogue NTP server or if it’s being … --- ## [List of trackers](https://community.ntppool.org/t/list-of-trackers/3826)
**Author:** [@cybermerlin](https://community.ntppool.org/u/cybermerlin)\ **Replies:** 32\ **Last updated:** [May 21, 2025, 11:24pm UTC](https://community.ntppool.org/t/list-of-trackers/3826 "2025-05-21T23:24:34Z")
hi. i need the list of monitors trackers to add they into whitelist. cuz after DDoS some addresses was added into the blacklist and now my score down to -90 --- ## [Strange Behavior of 0.debian.pool.ntp.org (84.255.251.205:123)](https://community.ntppool.org/t/strange-behavior-of-0-debian-pool-ntp-org-84-255-251-205-123/3759)
**Author:** [@johnny141](https://community.ntppool.org/u/johnny141)\ **Replies:** 27\ **Last updated:** [April 11, 2025, 10:18am UTC](https://community.ntppool.org/t/strange-behavior-of-0-debian-pool-ntp-org-84-255-251-205-123/3759 "2025-04-11T10:18:59Z")
Hello everyone, I want to report an issue we’ve encountered with one of the Debian NTP pool servers: 0.debian.pool.ntp.org (84.255.251.205:123). Our company operates multiple IoT devices, all of which are configured to… --- ## [Suggestions for the offset threshold for pool server](https://community.ntppool.org/t/suggestions-for-the-offset-threshold-for-pool-server/3716)
**Author:** [@Sebhoster](https://community.ntppool.org/u/Sebhoster)\ **Replies:** 20\ **Last updated:** [April 6, 2025, 10:44pm UTC](https://community.ntppool.org/t/suggestions-for-the-offset-threshold-for-pool-server/3716 "2025-04-06T22:44:25Z")
Hi everyone, currently, the pool monitoring and scoring system in regards to the time offset for a otherwise functional server boils down to the magic number of 125 milliseconds. A server persistently below this thresho… --- ## [How to apply for monitor API keys?](https://community.ntppool.org/t/how-to-apply-for-monitor-api-keys/3680)
**Author:** [@mengzhuo](https://community.ntppool.org/u/mengzhuo)\ **Replies:** 7\ **Last updated:** [December 19, 2024, 1:53am UTC](https://community.ntppool.org/t/how-to-apply-for-monitor-api-keys/3680 "2024-12-19T01:53:36Z")
I want to add monitors in China (pi with GPS) to improve the server numbers of CN or countries around maybe? How to get the API keys? I had send @ask a message 2 weeks ago. --- ## [Monitor in South America?](https://community.ntppool.org/t/monitor-in-south-america/3688)
**Author:** [@r00t](https://community.ntppool.org/u/r00t)\ **Replies:** 6\ **Last updated:** [December 16, 2024, 8:46pm UTC](https://community.ntppool.org/t/monitor-in-south-america/3688 "2024-12-16T20:46:03Z")
What is required to run a monitor in South America and are there any plans for that? --- ## [Monitors belgg1-19sfa9p and belgg2-19sfa9p having hiccups?](https://community.ntppool.org/t/monitors-belgg1-19sfa9p-and-belgg2-19sfa9p-having-hiccups/3575)
**Author:** [@PoolMUC](https://community.ntppool.org/u/PoolMUC)\ **Replies:** 70\ **Last updated:** [December 4, 2024, 1:00pm UTC](https://community.ntppool.org/t/monitors-belgg1-19sfa9p-and-belgg2-19sfa9p-having-hiccups/3575 "2024-12-04T13:00:21Z")
Hi @bas, Could you kindly check your monitors belgg1-19sfa9p and belgg2-19sfa9p? Since a few days, they seem to very occasionally see unusually high offsets, sometimes larger than 1 second. ts\_epoch,ts,offset,step,scor… --- ## [Network: i/o timeout](https://community.ntppool.org/t/network-i-o-timeout/3553)
**Author:** [@StopDragon](https://community.ntppool.org/u/StopDragon)\ **Replies:** 32\ **Last updated:** [November 20, 2024, 10:30am UTC](https://community.ntppool.org/t/network-i-o-timeout/3553 "2024-11-20T10:30:55Z")
Hi, I made my first ntp server this time. But I get red spots periodically, how do I fix this? I turned it off because of unifi’s Intrusion Detection and Prevention function, but the symptoms are the same. What could… --- ## [Different in offset?](https://community.ntppool.org/t/different-in-offset/3570)
**Author:** [@Hugodonotexit](https://community.ntppool.org/u/Hugodonotexit)\ **Replies:** 7\ **Last updated:** [October 25, 2024, 1:29am UTC](https://community.ntppool.org/t/different-in-offset/3570 "2024-10-25T01:29:33Z")
I got a esp32 ntp sever using gps as time source when i test it, i got fine offest: hugo@Hugo:~$ ntpdate -q 24 Oct 22:45:16 ntpdate\[368030\]: no servers can be used, exiting hugo@Hugo:~$ ntpdate -q time.zetalon.com se… --- ## [Minor improvement suggestion for pool DNS selection](https://community.ntppool.org/t/minor-improvement-suggestion-for-pool-dns-selection/3493)
**Author:** [@davehart](https://community.ntppool.org/u/davehart)\ **Replies:** 10\ **Last updated:** [September 19, 2024, 6:35am UTC](https://community.ntppool.org/t/minor-improvement-suggestion-for-pool-dns-selection/3493 "2024-09-19T06:35:32Z")
Right now, 2.\*.pool.ntp.org domains sometimes return both IPv4 and IPv6 addresses of the same server. I realize the internal implementation is nearly entirely name-agnostic, but it would be spiffy if this were avoided a… --- ## [Monitors mishandling empty responses](https://community.ntppool.org/t/monitors-mishandling-empty-responses/3490)
**Author:** [@davehart](https://community.ntppool.org/u/davehart)\ **Replies:** 2\ **Last updated:** [August 26, 2024, 12:05pm UTC](https://community.ntppool.org/t/monitors-mishandling-empty-responses/3490 "2024-08-26T12:05:25Z")
@ask please take a look at this discussion: It appears when a NTP server responds with no UDP payload it’s treated as a perfect 0 offset and included in the pool. [Next page](https://community.ntppool.org/tag/monitoring/1.md?match_all_tags=true&page=1&tags%5B%5D=monitoring)