The WalMart Atomic Clock

https://fed.brid.gy/r/https://hackaday.com/2026/02/14/the-walmart-atomic-clock/

The WalMart Atomic Clock https://hackaday.com/2026/02/14/the-walmart-atomic-clock/
#Clockhacks #Clockmovement #Ntp #Stepper

And our #opensprinkler is working daylight hours again. I went out late at night and it was watering the front garden. I thought it had to be a plumbing issue, but with #homeautomation in play, it was actually #DNS failure leading to #NTP protocol failure, leading to it being "midday" for the front garden.. #IOT ... a thing of beauty

Weekend Reads

* Peering market at a glance
https://labs.ripe.net/media/documents/Peering_market_at_a_glance.pdf
* Measuring NTP pool's robustness
https://www.ndss-symposium.org/ndss-paper/on-borrowed-time-measurement-informed-understanding-of-the-ntp-pools-robustness-to-monopoly-attacks/
* EU subsea cable security report
https://digital-strategy.ec.europa.eu/en/library/submarine-cable-security-toolbox-and-cable-projects-european-interest
* Observing address bogons in-the-wild
https://www.ndss-symposium.org/ndss-paper/aliens-among-us-observing-private-or-reserved-ips-on-the-public-internet/
* IP address registration geo-consistency
https://arxiv.org/abs/2602.11102

#BGP #NTP #SubseaCables #IPv4 #Geolocation

What is your preferred ntp client for your Linux systems?

#linux #NTP #sysadmin #homelab #selfhost #networking

why does #google need my tz to match #NTP to check if an expired 2fa #otp is being used?
#2fa

Stop Arch to "phone home"

https://youtu.be/TlxjY2N3j8o

#linux #arch #ntp

Google Time NTP Public Server | https://techygeekshome.info/google-time-ntp-public-server/?fsp_sid=29519 | #Google #Guide #News #NTP #refresh #Servers 
https://techygeekshome.info/google-time-ntp-public-server/?fsp_sid=29519

Google Time NTP Public Server | https://techygeekshome.info/google-time-ntp-public-server/?fsp_sid=29518 | #Google #Guide #News #NTP #refresh #Servers 
https://techygeekshome.info/google-time-ntp-public-server/?fsp_sid=29518

Are we going to have "smart" microwave ovens soon just to keep the fucking clock on time through NTP?

#NTP #IoT #Time

Almost every system assumes time is correct. Certificates expire, logs align, databases replicate, caches invalidate. Yet time synchronization is treated as background noise.

I would argue that NTP is one of the most critical services on the internet, and almost no one thinks about it unless it breaks. When it does, failures cascade in ways that look unrelated. Authentication fails. Distributed systems disagree. Debugging becomes guesswork.

Time is infrastructure. It just hides better than most.

#Infrastructure #DistributedSystems #NTP #Infosec #TechReality

@silverpill #TLS could be an issue if global #NTP/123 is down; some users may be surprised that they cannot access the Internet using 'old' devices that do not have the ability to upgrade their software from outdated repositories.

Solving all the issues I found one by one in my #homelab after a major internet outage.

Seems like the time sync issue on the #Philips #Hue bridge is ongoing. It pops out here and there periodically, and no general solution has been found.

It's not a big deal until you are using time-based scenes, like me.

So now I'm trying to trick the bridge into using my local #NTP server.

#selfhosted #PhilipsHue #SelfHost #SelfHosting

Seems like only 1 IPv4 and 3 IPv6 servers left in BD country NTP pool https://www.ntppool.org/zone/bd

#NTP #BD #time

Seems like 2.antarctica.pool.ntp.org is a thing. None of the other [0/1/3].antarctica.pool.ntp.org have any IP as 3 servers in pool (https://www.ntppool.org/zone/aq ) are IPv6 only (https://bgp.tools/dns/2.antarctica.pool.ntp.org).

#ntp #ntppool

@karppinen Maybe you could respond to them with a slightly wrong time so the queries will disperse around the next hour instead of a huge spike. #ChaoticEvil #NTP

Introducing Pixie; yet another GNSS disciplined Raspberry Pi timeserver setup. There are a number of low-level tweaks including a realtime kernel build, per-CPU process isolation, PTP grandmaster time support, and NTP server support. Check out the wiki for more details!
https://github.com/josh-blake/pixie #gnss #raspberrypi #rpi5 #embedded #timeserver #ptp #ntp

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

Made a quick #substack post about an idea that's been floating around in my brain re: proving the when of digital signatures:

https://open.substack.com/pub/bigntallmike/p/digital-signatures-arent-enough-yet?r=6i7fw3

WIP. Feedback appreciated.

#digitalSignatures #authentication #validation #ntp

I had to troubleshoot #NTP servers a few times without access to my laptop so I built this app two years ago. Today, I decided to release it for free for anyone who wants to use it. Find the NTP Inspector on the App Store!

https://apps.apple.com/app/ntp-inspector/id6757625801