- ripe-atlas - mailman.ripe.net

Asking for credits for a university project
by Serban Orza 27 May '25

27 May '25

Hello, Atlas community! I am Serban Orza, a second-year Computer Science student at Delft University of Technology. Together with another 4 students, we are working on an open-source project that measures the accuracy and reliability of NTP servers. We already implemented the basics, but we would like to integrate RIPE Atlas to have a global perspective and to avoid the bias of a single measurement point. We would appreciate it a lot if somebody could provide us with some RIPE API credits to perform measurements and analyze the reachability of NTP servers. My account at RIPE NCC is on this email: orza(a)student.tudelft.nl Thank you! Serban

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Anchor time sources
by Tim Chown 27 May '25

27 May '25

Hi, I assume the anchor nodes take their time via NTP and a general NTP pool? Have there been studies of time drift on anchors? Is there a way to configure a specific set of NTP sources? Thanks, Tim

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Atlas reported uptime vs OS reported uptime
by Alexander Männel 26 May '25

26 May '25

Hi atlas folks, is there a way to get the operating system uptime of a probe? The reason I'm wondering is that I want to differentiate a shut down probe (i.e. power outage, operator reasons) from a disconnected probe (i.e. Internet connectivity lost). Depending on the goal of a measurement these two cases should be considered differently. The one way I think this is currently possible is to look for results that the probe has uploaded from its local buffer after it has regained network connectivity. In case of a disconnected probe, there will be measurement results during the outage but not if the probe was fully turned off. This approach is however a bit hacky and requires you to query the event log and align that with the measurement results. Depending on how often your measurement runs, you might have to query data from the built-ins as well. Of course you can always try to look at probes from the same region/AS and see if they faced outages, but this requires a lot of additional data to be queried and will not be 100% accurate. I understand that this probably is only relevant for a subset of all probes, but also collecting the uptime as tracked by the OS would be a simple fix to easily differenciate between different disconnect reasons. Regards, Alexander Männel -- Alexander Männel TU Dresden, Chair of Distributed and Networked Systems https://tu-dresden.de/cs/netd

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Ripe Probes clock update
by Giovane C. M. Moura 12 May '25

12 May '25

Hi Atlas folks, I was wondering if there is an update on how Atlas probes sync their clocks from the article from 10 years ago[0]. * Anchors: `pool.ntp.org` * v1: fallback mechanism using HTTP * v2 : ntpclient (but which ntp servers?) * v3: opentpd (but which ntp servers)? What about newer probes version? v4? v5? vms? Thanks, /giovane [0] https://labs.ripe.net/author/philip_homburg/ntp-measurements-with-ripe-atla…

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Atlas UI update - New Internet Maps
by Stephen Suess 01 May '25

01 May '25

Hello Atlas Community, We have just released an update to the UI that completely reworks the Internet Maps section: Root Name Server Instances & RTT to well-known destinations Performance: many times faster than previous maps Sharable URLs with all params Clickable legend tags to filter probe markers Probes on maps are searchable by ID, ASN, Country, IP, Prefix Time travel up to 30 days in the past You can find these maps here: https://atlas.ripe.net/maps/ Over the next couple of months we plan to bring many of the performance improvements of these maps to other areas of Atlas as well as refining and adding to the Internet Maps collection. And as always, we hope you find these changes useful and we welcome your feedback. Kind regards, Stephen Atlas UI

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RIPE Atlas API rate limits
by Huseyn Gambarov 30 Apr '25

30 Apr '25

Hello. While looking for the rate limits defined for the RIPE Atlas API, I found the mail sent by Robert Kisteleki two years ago saying: > The measurement API in particular will impose a limit of 150 queries/second (if done over multiple connections) Can you tell me please, if the requests sent to the Streaming API are also considered in this limit? Thank you. Original mail: https://mailman.ripe.net/archives/list/ripe-atlas@ripe.net/thread/7K4JC7ZZN… With regards, Huseyn Gambarov Research Assistant PhD Student in Computer Science Case Western Reserve University

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bulk-email.ripe.net
by Marco Moock 29 Apr '25

29 Apr '25

Hello! Some mails regarding RIPE atlas are being sent via bulk-email.ripe.net. Is there a reason RIPE uses that 3rd party (IPv4-only) service instead of its own infrastructure? -- Gruß Marco

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Newbish DNS question
by Hank Nussbacher 29 Apr '25

29 Apr '25

Perhaps a newbie question: I am doing a DNS measurement and almost all probes return NXDOMAIN (expected), yet one probe returns NOERROR. How can I determine which DNS server it is using to provide a NOERROR? See attached json. Thanks, Hank

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Atlas credits fallen way below zero
by Seth David Schoen 23 Apr '25

23 Apr '25

Hi, I created some rather large measurements a few months ago. I got a notice at some point that I was going to run out of credits and that the measurements would be stopped -- something which has happened to me before. Somehow, it looks like the measurements didn't stop (or maybe did stop and were then resumed), and my account balance has gone very significantly negative before I got around to checking what was going on. I keep getting e-mail notifications warning me that my balance is nearly exhausted, but these notifications (correctly?) state that my balance is already negative, and will run out a negative amount of time into the future. Can I assume this is a backend bug, where some part of the logic for credit exhaustion wrongly assumes that one's balance is currently positive, and then never triggers after it somehow becomes negative? My dashboard page somewhat comically states Daily credit spending currently (approximately) / your limit: 7160665 / 1000000 Daily measurement result flow (approximately) / your limit: 721024 / 100000 I didn't mean to "overdraw" the system or use resources without contributing resources back; I just didn't realize the cost of some particular measurements, and had previously seen that measurements that one's account couldn't afford would in fact be terminated. Can I "declare bankruptcy" and get my balance reset to zero? And can someone take a look at the credit logic to understand how this credit overdraft phenomenon can come about? Thanks!

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Atlas Account Disabled
by cassianoaquino＠me.com 22 Apr '25

22 Apr '25

Hi, I was trying to login to my atlas ripe account and forgot I had multiple authenticators configured and kept trying with the wrong one which gave me an error about the account being disabled to contact "your administrator". Now when I try to login it says "Invalid email address or password". Is there someone who can help me or point me on how to contact "your administrator"? The atlas login email is the same I use here on the mailing list. Thanks in advance!

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