# Client Configuration and Development **URL:** https://community.ntppool.org/c/clients/10.md?page=1 [Latest](https://community.ntppool.org/latest.md) · [Categories](https://community.ntppool.org/categories.md) · [Tags](https://community.ntppool.org/tags.md) **Page:** 2 --- ## [NTP Backup Servers](https://community.ntppool.org/t/ntp-backup-servers/2353)
**Author:** [@Georg](https://community.ntppool.org/u/Georg)\ **Replies:** 4\ **Last updated:** [April 25, 2022, 5:26pm UTC](https://community.ntppool.org/t/ntp-backup-servers/2353 "2022-04-25T17:26:35Z")
I don't know if I get the Concept of this Selection right. 0.de.pool.ntp.org 1.de.pool.ntp.org 2.de.pool.ntp.org 3.de.pool.ntp.org Wouldn't it be better to have different Providers like this? 0.de.pool.ntp.org 0.ch.pool… --- ## [Ntp4 extension fields](https://community.ntppool.org/t/ntp4-extension-fields/2351)
**Author:** [@Kevans](https://community.ntppool.org/u/Kevans)\ **Replies:** 1\ **Last updated:** [April 22, 2022, 8:40am UTC](https://community.ntppool.org/t/ntp4-extension-fields/2351 "2022-04-22T08:40:16Z")
Hello there. I’m fetching ntp time from a client using the us.pool. I’m looking to use NTP v4 for use of the extension fields and higher precision for fetched time. However, I’m an unsure what field type to specificy in… --- ## [Ntp server reachable but not sync when use ntpd](https://community.ntppool.org/t/ntp-server-reachable-but-not-sync-when-use-ntpd/2243)
**Author:** [@alvintang](https://community.ntppool.org/u/alvintang)\ **Replies:** 2\ **Last updated:** [November 30, 2021, 8:39pm UTC](https://community.ntppool.org/t/ntp-server-reachable-but-not-sync-when-use-ntpd/2243 "2021-11-30T20:39:37Z")
Hi We have some embedded devices using ntpd to sync the time. One of our customers is using their own ntp server inside an internal network. From the ntpd -dgq debug mode, we found the server is reachable and we can ge… --- ## [How does GPS on the adafruit ultimate hat handle leap seconds?](https://community.ntppool.org/t/how-does-gps-on-the-adafruit-ultimate-hat-handle-leap-seconds/2246)
**Author:** [@tennisbowling](https://community.ntppool.org/u/tennisbowling)\ **Replies:** 2\ **Last updated:** [November 19, 2021, 10:13pm UTC](https://community.ntppool.org/t/how-does-gps-on-the-adafruit-ultimate-hat-handle-leap-seconds/2246 "2021-11-19T22:13:30Z")
Hello. I haven’t been able to find much information on how leap seconds are announced when using gps with a adafruit ultimate hat. So for a future leap second, how would my server get that there is a leap second? --- ## [NTP update /w an offset](https://community.ntppool.org/t/ntp-update-w-an-offset/1997)
**Author:** [@MikeK6](https://community.ntppool.org/u/MikeK6)\ **Replies:** 3\ **Last updated:** [November 17, 2021, 11:10pm UTC](https://community.ntppool.org/t/ntp-update-w-an-offset/1997 "2021-11-17T23:10:00Z")
I would have thought that my personal Windows PC was getting NTP updates, but after a few months I noticed that my system clock was off by 8 minutes! I’ve determined that my motherboard is gaining a second every 15 minu… --- ## [NTP in android without java and zygote](https://community.ntppool.org/t/ntp-in-android-without-java-and-zygote/2161)
**Author:** [@kishan.kava](https://community.ntppool.org/u/kishan.kava)\ **Replies:** 0\ **Last updated:** [September 23, 2021, 11:30am UTC](https://community.ntppool.org/t/ntp-in-android-without-java-and-zygote/2161 "2021-09-23T11:30:08Z")
Hello i have android device which is running android 7.1. there is no zygote and java support in firmware. and whenever i try to run ntp daemon whole system get reboot. i had add my host machine ip in ntp.conf (ping is … --- ## [Getting a weird error message ever since I got PPS working, any idea what it means?](https://community.ntppool.org/t/getting-a-weird-error-message-ever-since-i-got-pps-working-any-idea-what-it-means/2124)
**Author:** [@Knight](https://community.ntppool.org/u/Knight)\ **Replies:** 1\ **Last updated:** [August 11, 2021, 12:03pm UTC](https://community.ntppool.org/t/getting-a-weird-error-message-ever-since-i-got-pps-working-any-idea-what-it-means/2124 "2021-08-11T12:03:30Z")
Hi! I got a device built around an u-blox LEA-5T a few years ago and finally decided to set it up on a FreeBSD based machine. It is connected through DB-9/DE-9 serial port because to get able to get PPS out of it. PP… --- ## [Help with using gps time with chrony](https://community.ntppool.org/t/help-with-using-gps-time-with-chrony/2116)
**Author:** [@tennisbowling](https://community.ntppool.org/u/tennisbowling)\ **Replies:** 8\ **Last updated:** [August 5, 2021, 1:20am UTC](https://community.ntppool.org/t/help-with-using-gps-time-with-chrony/2116 "2021-08-05T01:20:10Z")
Hello, I’m currently following this guide Building a GPS Time Server with the Raspberry Pi 3 . It’s a great guide, just it uses ntpd. My question is how would I use the ntpq -q command with chrony? What is the equivalent… --- ## [Suggestion of good RPi GPIO-compatible GPS Receiver for NTP?](https://community.ntppool.org/t/suggestion-of-good-rpi-gpio-compatible-gps-receiver-for-ntp/2032)
**Author:** [@teward](https://community.ntppool.org/u/teward)\ **Replies:** 2\ **Last updated:** [June 17, 2021, 1:49am UTC](https://community.ntppool.org/t/suggestion-of-good-rpi-gpio-compatible-gps-receiver-for-ntp/2032 "2021-06-17T01:49:10Z")
Hello! I’m looking for a good GPIO-compatible GPS receiver to set up a Stratum-1 server on premises here with an RPi. I’m finding threads from 2018 about good receivers, but looking for someone with recent experience w… --- ## [NTP client on gateway not able to receive server response on a specific interface](https://community.ntppool.org/t/ntp-client-on-gateway-not-able-to-receive-server-response-on-a-specific-interface/2030)
**Author:** [@vinod00792](https://community.ntppool.org/u/vinod00792)\ **Replies:** 0\ **Last updated:** [June 7, 2021, 11:39am UTC](https://community.ntppool.org/t/ntp-client-on-gateway-not-able-to-receive-server-response-on-a-specific-interface/2030 "2021-06-07T11:39:21Z")
Hello, This is my first post in this forum, thanks for adding me to the group. We have the below NTP client version running on all our gateway’s. ntpd - NTP daemon program - Ver. 4.2.8p8 Configurations on the gateway… --- ## [Excessive (100,000+) DNS queries for local and global NTP server configurations in 1Hr](https://community.ntppool.org/t/excessive-100-000-dns-queries-for-local-and-global-ntp-server-configurations-in-1hr/1957)
**Author:** [@vipul7261](https://community.ntppool.org/u/vipul7261)\ **Replies:** 7\ **Last updated:** [April 21, 2021, 4:28am UTC](https://community.ntppool.org/t/excessive-100-000-dns-queries-for-local-and-global-ntp-server-configurations-in-1hr/1957 "2021-04-21T04:28:33Z")
I’m working on a product which is running on Linux platform with the NTP version of 4.2.8 p12. I’ve seen more than 1,00,000 queries to DNS server in a fairly short period of time while date/time configuration to fetch fr… --- ## [Frequency error](https://community.ntppool.org/t/frequency-error/1872)
**Author:** [@kishan.kava](https://community.ntppool.org/u/kishan.kava)\ **Replies:** 14\ **Last updated:** [December 28, 2020, 9:33am UTC](https://community.ntppool.org/t/frequency-error/1872 "2020-12-28T09:33:31Z")
hi ntpd -d driftfile /var/lib/ntp/ntp.drift logfile /scandata/ntp.log tinker panic 0 logconfig =all Enable this if you want statistics to be logged. more information. server 10.100.130.72 prefer By default, exchan… --- ## [Clock Unsynchronized](https://community.ntppool.org/t/clock-unsynchronized/1855)
**Author:** [@kishan.kava](https://community.ntppool.org/u/kishan.kava)\ **Replies:** 2\ **Last updated:** [December 4, 2020, 7:01am UTC](https://community.ntppool.org/t/clock-unsynchronized/1855 "2020-12-04T07:01:43Z")
hello i have device with android running. ntpd and ntpq is available in device and i have configure ntp.conf file with my local linux machine. whenever i start ntpd -d it shows kernel reports TIME\_ERROR: 0x2041: Clock U… --- ## [Understanding RPi GPSD PPS SHM units](https://community.ntppool.org/t/understanding-rpi-gpsd-pps-shm-units/1731)
**Author:** [@Ryan](https://community.ntppool.org/u/Ryan)\ **Replies:** 2\ **Last updated:** [July 4, 2020, 12:38pm UTC](https://community.ntppool.org/t/understanding-rpi-gpsd-pps-shm-units/1731 "2020-07-04T12:38:26Z")
Hello! Please excuse my probably newbie question … I have a Pi running GPSD and I see the input from the AdaFruit Ultimate GPS, and I see the PPS input as well (ppstest). I have NTP running, and I’m using the SHM drive… --- ## [No AAAA records on pool.ntp.org](https://community.ntppool.org/t/no-aaaa-records-on-pool-ntp-org/1722)
**Author:** [@Garbage](https://community.ntppool.org/u/Garbage)\ **Replies:** 5\ **Last updated:** [June 21, 2020, 12:55pm UTC](https://community.ntppool.org/t/no-aaaa-records-on-pool-ntp-org/1722 "2020-06-21T12:55:59Z")
So i am using au\[.\]pool\[.\]ntp\[.\]org for my ATA, and i noticed the time is wrong. The ATA is IPv6 only. I notice ntp\[.\]org advertises it has IPv4 and IPv4, but no IPv6 address is returned when resolving pool\[.\]ntp\[.\]org ? … --- ## [Why ntpdate -q does not work?](https://community.ntppool.org/t/why-ntpdate-q-does-not-work/1642)
**Author:** [@linuly](https://community.ntppool.org/u/linuly)\ **Replies:** 2\ **Last updated:** [May 17, 2020, 1:34pm UTC](https://community.ntppool.org/t/why-ntpdate-q-does-not-work/1642 "2020-05-17T13:34:06Z")
hi, ntp client - not work with ntp server. ntp server.-\>/etc/ntp.conf restrict 192.168.30.0 mask 255.255.255.0 nomodify notrap server 0.ro.pool.ntp.org server 1.ro.pool.ntp.org server 2.ro.pool.ntp.org server 3.ro… --- ## [NTP pool wrong time issue 2/5/20](https://community.ntppool.org/t/ntp-pool-wrong-time-issue-2-5-20/1570)
**Author:** [@steve2030](https://community.ntppool.org/u/steve2030)\ **Replies:** 26\ **Last updated:** [February 12, 2020, 5:48am UTC](https://community.ntppool.org/t/ntp-pool-wrong-time-issue-2-5-20/1570 "2020-02-12T05:48:54Z")
We point our servers to the pool, but yesterday we had 80% of our ESXi hosts in several data centers pick up time that was roughly 40 minutes fast yesterday morning. We are still trying to figure out what happened, as we… --- ## [Weird problem with my public NTP server](https://community.ntppool.org/t/weird-problem-with-my-public-ntp-server/1504)
**Author:** [@bogdan.jeliskoski](https://community.ntppool.org/u/bogdan.jeliskoski)\ **Replies:** 2\ **Last updated:** [November 24, 2019, 11:54am UTC](https://community.ntppool.org/t/weird-problem-with-my-public-ntp-server/1504 "2019-11-24T11:54:09Z")
OK guys, so I have public NTP server, and it was installed on Fedora 30. I needed to change to Ubuntu, so I made new configuration to Ubuntu 18.04.3 LTS. But here is the thing, I installed the NTP, and no matter what NTP… --- ## [Ntpstat unsynchronised polling server every 64 s](https://community.ntppool.org/t/ntpstat-unsynchronised-polling-server-every-64-s/1502)
**Author:** [@amey8842](https://community.ntppool.org/u/amey8842)\ **Replies:** 1\ **Last updated:** [November 22, 2019, 8:19am UTC](https://community.ntppool.org/t/ntpstat-unsynchronised-polling-server-every-64-s/1502 "2019-11-22T08:19:50Z")
facing "unsynchronised polling server every 64 s " Help me out. Thanks in advance --- ## [Very long jumps in system time](https://community.ntppool.org/t/very-long-jumps-in-system-time/1475)
**Author:** [@couling](https://community.ntppool.org/u/couling)\ **Replies:** 5\ **Last updated:** [October 23, 2019, 3:38pm UTC](https://community.ntppool.org/t/very-long-jumps-in-system-time/1475 "2019-10-23T15:38:27Z")
Hi I’m investigating a strange phenomenon we’re seeing with a fleet of IOT devices. We’re seeing significant time jumps on the system clocks. These jumps can be minutes but some are months. The erroneous time never last… --- ## [Yealink Phones use cn.pool.ntp.org by default](https://community.ntppool.org/t/yealink-phones-use-cn-pool-ntp-org-by-default/1380)
**Author:** [@Medowar](https://community.ntppool.org/u/Medowar)\ **Replies:** 2\ **Last updated:** [October 6, 2019, 3:36pm UTC](https://community.ntppool.org/t/yealink-phones-use-cn-pool-ntp-org-by-default/1380 "2019-10-06T15:36:13Z")
I was playing around with Yealink Phones, when I noticed, that in factory defaults, those Phones have hardcoded the CN-Pool as NTP Server. Firmware T48-35.83.0.30, not the newest, but maybe 1 or 2 Versions out. I hav… --- ## [Massive packet loss on be.pool.ntp.org since 9/09/2019](https://community.ntppool.org/t/massive-packet-loss-on-be-pool-ntp-org-since-9-09-2019/1416)
**Author:** [@finalbeta](https://community.ntppool.org/u/finalbeta)\ **Replies:** 9\ **Last updated:** [September 14, 2019, 3:22pm UTC](https://community.ntppool.org/t/massive-packet-loss-on-be-pool-ntp-org-since-9-09-2019/1416 "2019-09-14T15:22:32Z")
Dear, sry if this is the wrong place/section to post. I’ve been using be.pool.ntp.org to monitor time differences between local equipement and standard time. I’ve been doing this from a number of networks and I’ve been … --- ## [Command "ntpq -p" takes time more than 5 sec](https://community.ntppool.org/t/command-ntpq-p-takes-time-more-than-5-sec/1305)
**Author:** [@akshya2310](https://community.ntppool.org/u/akshya2310)\ **Replies:** 3\ **Last updated:** [July 22, 2019, 1:28pm UTC](https://community.ntppool.org/t/command-ntpq-p-takes-time-more-than-5-sec/1305 "2019-07-22T13:28:45Z")
What is the maximum time this command can take to show the output. --- ## [Airgapped Network - source discarded high stratum, failed sanity](https://community.ntppool.org/t/airgapped-network-source-discarded-high-stratum-failed-sanity/1280)
**Author:** [@AinsleyR](https://community.ntppool.org/u/AinsleyR)\ **Replies:** 3\ **Last updated:** [June 11, 2019, 1:01pm UTC](https://community.ntppool.org/t/airgapped-network-source-discarded-high-stratum-failed-sanity/1280 "2019-06-11T13:01:42Z")
Hello there! NTP Newbie here, and hoping someone might be able to provide some guidance please. I’ve lost hours and hours trying to get an NTP configuration working. I have a network which needs to be completely isolat… --- ## [Ntpd syncing is not working](https://community.ntppool.org/t/ntpd-syncing-is-not-working/1276)
**Author:** [@karthikkb93](https://community.ntppool.org/u/karthikkb93)\ **Replies:** 18\ **Last updated:** [June 6, 2019, 6:44pm UTC](https://community.ntppool.org/t/ntpd-syncing-is-not-working/1276 "2019-06-06T18:44:34Z")
Newbie Alert !! I am trying to achieve periodic syncing of time on my board or when the time zone changes. So i am thinking a manual call when the timezone changes should be the right way against the periodic syncing. … --- ## [Another NTP client failure story](https://community.ntppool.org/t/another-ntp-client-failure-story/1014)
**Author:** [@trs80](https://community.ntppool.org/u/trs80)\ **Replies:** 24\ **Last updated:** [May 29, 2019, 7:49pm UTC](https://community.ntppool.org/t/another-ntp-client-failure-story/1014 "2019-05-29T19:49:50Z")
I came across this funny story https://strugglers.net/~andy/blog/2018/12/24/the-internet-of-unprofitable-things/ --- ## [NTPD gets killed if offset is more than 1000 secs](https://community.ntppool.org/t/ntpd-gets-killed-if-offset-is-more-than-1000-secs/1098)
**Author:** [@sarju32](https://community.ntppool.org/u/sarju32)\ **Replies:** 4\ **Last updated:** [March 12, 2019, 1:27pm UTC](https://community.ntppool.org/t/ntpd-gets-killed-if-offset-is-more-than-1000-secs/1098 "2019-03-12T13:27:17Z")
Hi Team, We are trying to configure NTP server and NTP client for time sync up in our Testing Envrinoment. Below is our setup: NTP Server - Linux Host PC (Ubuntu 14.04 LTS 64 bit) NTP Client - Custom hardware based on … --- ## [PPS on serial port](https://community.ntppool.org/t/pps-on-serial-port/1039)
**Author:** [@W9GYR](https://community.ntppool.org/u/W9GYR)\ **Replies:** 5\ **Last updated:** [January 22, 2019, 4:54pm UTC](https://community.ntppool.org/t/pps-on-serial-port/1039 "2019-01-22T16:54:04Z")
I’ve been running a GPS with NMEA and PPS outputs connected to a server with a DB25 serial port. The PPS is wired to the DCD pin with the type 20 generic NMEA driver. The new server that I would like to connect the GPS t… --- ## [NTP Support SHA2 or not](https://community.ntppool.org/t/ntp-support-sha2-or-not/913)
**Author:** [@sachin](https://community.ntppool.org/u/sachin)\ **Replies:** 6\ **Last updated:** [October 15, 2018, 6:48am UTC](https://community.ntppool.org/t/ntp-support-sha2-or-not/913 "2018-10-15T06:48:41Z")
Hi, We are using ntp-4.2.6p5-28.el7, Please let us know whether the NTP support SHA2 with FIPS enable and disable? Regards --- ## [Non responding server](https://community.ntppool.org/t/non-responding-server/940)
**Author:** [@assaf](https://community.ntppool.org/u/assaf)\ **Replies:** 4\ **Last updated:** [October 7, 2018, 6:47am UTC](https://community.ntppool.org/t/non-responding-server/940 "2018-10-07T06:47:17Z")
Hi all. I’m developing an embedded device for my company, and trying to embed sntp client on it. All works fine except from when the server I set is “pool.ntp.org”. the resolved ip from the given name server would be … [Previous page](https://community.ntppool.org/c/clients/10.md) [Next page](https://community.ntppool.org/c/clients/10.md?page=2)