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

In case you are worried about the RCEs in #ntpd, take it slow(er), read both comments:

* 4/5 vulns in NTPQ: https://github.com/spwpun/ntp-4.2.8p15-cves/issues/1#issuecomment-1506667321

* 5th unlikely to be triggered: https://github.com/spwpun/ntp-4.2.8p15-cves/issues/1#issuecomment-1506546409

In general probably a good idea to follow the GH-issue during the next hours and days.

RT @linuxaudit@twitter.activitypub.actor

Troubleshooting Linux Time Synchronization with NTP https://linux-audit.com/troubleshooting-linux-time-synchronization-with-ntp/ #ntpd #ntpdate

🐦🔗: https://twitter.com/linuxaudit/status/1642584732117487618

@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?

Updated #FreshTomato #firmware on my #Netgear #R7000 #router and #ASUS RT-N66U that I use as a switch + WiFi AP.

For some reason it was a pain to get the WAN working again. Rebooting the cable modem and R7000 eventually cleared it up?

Noticed that #busybox #ntpd on the firmware doesn't respond to ntpq queries and is rather config-limited, so I installed the #entware version on the R7000's USB stick.

Also uninstalled #avahi because it's now built into the firmware - neat! Now do #wsdd2 please!

Huch, ich hab hier mehrere #ntpd-Prozesse, die die gesamte CPU belegen. Das hatte ich auch noch nicht.

Depuis une mise à jour d'#ArchLinux, #OpenNTPD (de OpenBSD) ne synchronise plus l'horloge. Retour au traditionnel #ntpd, qui marche. (Et qui permet de restreindre les accès par adresse IP.)

#NTP #sysAdmin