NTP in practice. Mostly it works. Time to time it's like 8 hours off. Internet connection is working.

I already debugged unreliable NTP once and replaced the unreliable "ntp" NTP daemon with much more reliable "chrony" NTP daemon. But still unreliable.

"Old people don't like computers" - because computers are unreliable! Why would I use something that's unreliable? A tuning fork ground out of quartz, invented by Seiko, connected to a battery, semiconductor amplifier, 15-bit counter, few logic gates, stepper motor, cogwheels, hands and a clock face is much more reliable!

#ntp #unreliable #linuxfail #linux #chrony #ntpd #reliability

This is what the NTP protocol does

#NTP #ntpd #network #time #protocol #timesync #programming

https://en.wikipedia.org/wiki/Network_Time_Protocol?wprov=sfla1

GPS-gestützter Zeitserver mit Raspberry Pi: So baust Du Deine eigene Grandmaster Clock

Mit einem Raspberry Pi und einem GPS-Empfänger lässt sich ein präziser Stratum-1 Zeitserver aufbauen – inklusive PPS-Signal und PTP-Unterstützung. So entsteht eine kostengünstige Alternative zu teuren Grandmaster Clocks, die exakte Zeit im ganzen Netzwerk be

#chrony #Clock #gps #grandmaster #nmea #ntp #ntpd #pi #pps #rasbian #raspberry #zeitserver

https://dirkwouters.de/gps-gestuetzter-zeitserver-mit-raspberry-pi-so-baust-du-deine-eigene-grandmaster-clock/

TIL: when you have weird problems with your encription, 2 min of de synchronization are enough to make fail all the certificates. 1st thing to watch. You’ll save a lot of time 🤪#deltachat #encryption #ntpd

@nixCraft : Cosmic rays or timesync not in order? 👹 🕜 🕑

(#ntpd vs #systemd-resolved anyone?!)

Why am I using #chrony when #busybox already provides #ntpd?

@mark @M0CUV Perhaps some info here on clocks via GPS, very tantalising rabbit hole....
https://openwrt.org/docs/guide-user/services/ntp/gps
https://github.com/domschl/RaspberryNtpServer
https://github.com/tiagofreire-pt/rpi_uputronics_stratum1_chrony
#gps #stratum1 #ntp #chrony #ntpd

Just like DNS way, way, waaaaaaaay too many seem to mess up NTP. So I wrote a thing about monitoring NTP with OpenSearch/ElasticSearch.

https://www.infosecworrier.dk/blog/2025/03/ntpmonitoring/

#ElasticSearch #OpenSearch #NTP #NTPd #NTPSec #CriticalInfrastructure

New release Ansible role stafwag.ntpd, and clean up Ansible roles

https://stafwag.github.io/blog/blog/2024/08/25/ansible-role-ntpd-released/

I made some time to give some love to my own projects and spent some time rewriting the Ansible role stafwag.ntpd and cleaning up some other Ansible roles.

#ansible #linux #ntpd #chrony #systemd #linux #freebsd #openbsd #netbsd

#stafwag @stafwag

sigh. it has been 0️⃣ days since I wanted to rewrite #ntpd and #gpsd in #rust again.

(ntpd on a raspberry pi is now crashing when i make it use the gps as a reference clock).

Time to try out Chrony before I start screaming or writing code.

His legacy lives on in the synchronized heartbeat of our connected world.

[...] Dr. David L. Mills, the inventor of Network Time Protocol (NTP), died peacefully at age 85 on January 17, 2024 [...]

https://arstechnica.com/?p=1997331

#ntp #ntpd

holy shit, das #logging vom #ntpsec #ntpd ist ja mal so mies

die _haben_ extra eine relativ feingliedrige "LOGIF"-Infrastruktur gebaut, die es erlaubt spezifische Meldungen in einer Matrix aus Klassen und Kategorien ein- und auszuschalten, und sie nutzen es intern einfach nicht sondern blasen alles in den Syslog.

Bedeutet dass der Syslog voll ist mit DNS errors wenn die Leitung weg ist, weil "einen anbleibenden Fehlerzustand nicht erneut loggen" ist anscheinend auch zu viel verlangt. ⁉️

Solventar conflicto de Apparmor con ntpd

https://www.ochobitshacenunbyte.com/2023/09/19/solventar-conflicto-de-apparmor-con-ntpd/

#Apparmor #ntp #ntpd #linux #suse #sles

Lately I've been looking at my #NTP #rrdtool graphs more often because I switched the NTP implementation on my #FreeBSD server from #ntpd to #chrony. Overall, I'm quite impressed with chrony - although it seems to be so good I wonder if I'm plotting comparable data. :) #timenut

Last week, I did a major OS upgrade and replaced a dumb switch with a managed one and set up LACP. Doing this however seems to result in weird latency/time offset spikes. Unplugging one of the two members cleans it up.

Ugh... GPS on my router isn't getting a good enough of a signal. Seriously don't want to set up a separate NTP server on my network above ground...

#homelab #tech #ntpd

"New kid on the block:" A #NTP #client and #server rewritten in #Rust with #NTS capabilities.

Repo: https://github.com/pendulum-project/ntpd-rs
Info: https://www.memorysafety.org/initiative/ntp/

#ntpd #chrony

@texttheater Die Unix-Philosophie besagt: "Do one thing, and do it well". Damit ist gemeint, dass jedes Kommandozeilenprogramm einen bestimmten Skopus haben sollte (#Orthogonalität). Durch Pipelines usw. lassen sich die Unix-Tools bei Bedarf kombinieren. Systemd hat statt dessen alles Mögliche wahllos integriert – oftmals in schlechterer Qualität. So musste ich erst neulich wieder #ntpd installieren, weil das in #systemd integrierte Pendant einfach nicht gut genug ist.

Speaking of my #NAS; I have a jail on my (#TrueNAS Core) NAS that runs a few proxying services, including an #ntpd. It has this in /etc/rc.conf:

ntpdate_enable="YES"
ntpd_enable="YES"

So ... why doesn't ntpd start at boot? service ntpd start starts it immediately. It hasn't started at boot for literally years, I have to start it by hand on every reboot. Why?