- ripe-atlas - mailman.ripe.net

Measurement result issues for some RIPE Atlas anchors
by Philip Homburg 18 Apr '19

18 Apr '19

In April, we started investigating a strange traceroute result reported by one of the RIPE Atlas anchors. The conclusion of our investigation is that the probe upgrade process for the v3 anchor firmware has been leaving old measurement daemons running as well as starting new ones. This means that a gradually increasing number of measurements from the affected anchors have been performed multiple times more or less simultaneously. Because those processes were writing to the same file, this resulted in a lot of garbled results. Purely by chance, the weird result that triggered the investigation had the first part of one result and the last part of another result in a way that generated syntactically correct JSON. The net result is that for the last few months, measurements done by anchors may have resulted in multiple results at roughly the same time or no results because the results were rejected as invalid. For those who wish to check whether results for specific measurements were affected, the following links will direct you to lists of probe IDs for the affected anchors: https://atlas.ripe.net/api/v2/probes/?is_anchor=true&tags=system-virtual&fi… (VM anchors) https://atlas.ripe.net/api/v2/probes/?is_anchor=true&tags=system-v3-pc-engi… (v3 hardware anchors) We are working to resolve the issue and will keep you updated as and when we have more to report. We apologise for any inconvenience this might cause. Philip

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DNS-over-TLS and DNS-over-HTTPS measurement
by Petr Špaček 10 Apr '19

10 Apr '19

Hello, could you share plans for DNS-over-TLS and DNS-over-HTTPS measurements? I had impression that DNS-over-TLS is already supported but now I cannot find it in the UI so I'm probably wrong. Thank you for information! -- Petr Špaček @ CZ.NIC

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Scheduled RIPE Atlas maintenance 2019-04-10 09:00 UTC
by Chris Amin 10 Apr '19

10 Apr '19

Dear RIPE Atlas users, We are planning on making a behind-the-scenes change to the RIPE Atlas database tomorrow in order to make the system more robust. Measurements scheduled during this time may be either rejected or delayed. Probes will continue to carry out measurements as usual so there won't be a gap in scheduled measurement results. The window for the maintenance is 2019-04-10 09:00 UTC until 12:00 UTC. We hope that it will be quicker than this and will keep you updated. Kind regards, Chris Amin RIPE NCC

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DNS measurements broken today?
by Stephane Bortzmeyer 05 Apr '19

05 Apr '19

It seems all DNS measurements (not just mine, checked on <https://atlas.ripe.net/measurements/?page=1#tab-dns> return only an empty array today... % curl -s https://atlas.ripe.net/api/v2/measurements/20566896/results/ []%

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Responsive Probe Fluctuations
by Marcel Flores 05 Apr '19

05 Apr '19

Hi All, Noticed a funny little swing in probe responsiveness. It seems to have returned to normal, but was curious if anyone else had seen it. We do one-off measurement where we select all probes, usually the responsiveness rates look something like: 12743 Requested / 10147 Actually Participated (Taken from 18 March) But on 19 March we started seeing rates more like: 12914 Requested / 7852 Actually Participated Which continued until about 28 March, when it returned to about the previous levels: 12916 Requested / 9943 Actually Participated Something funny happen with the dispatching? Did anybody else see? -- *Marcel Flores, PhD* | Sr. Research Scientist research.verizondigitalmedia.com | AS15133 <https://www.peeringdb.com/asn/15133> p: +1 310.593.6880 e: marcel.flores(a)verizondigitalmedia.com 13031 W Jefferson Blvd. Building 900, Los Angeles, CA 90094

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Probe not coming online anymore after firmware upgrade
by Annika Wickert 25 Mar '19

25 Mar '19

Hi everyone, I bought a new USB Stick for this probe as the old one was tagged as readonly etc.. https://atlas.ripe.net/probes/23913/ <https://atlas.ripe.net/probes/23913/> In the panel it says: 2019-03-21 14:50:02 UTC Probe firmware upgraded Your probe #23913 <https://atlas.ripe.net/probes/23913/> upgraded its firmware from version 3.3.8 to version 4960 But for some reason it is not coming online at all :(. Any idea what could be the issue? I also see no network traffic at all originating from the probe. Best, Annika

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Fwd: credit request
by Michael Rabinovich 22 Mar '19

22 Mar '19

(I previously subscribed to this list using the same mail alias as used for my RIPE Atlas account, and the mail below was held up for moderation since it came from a non-matching email address. I now changed my subscription and am re-sending that email. I apologize in advance if the moderator releases the original mail and you see a duplicate. — Michael) > Begin forwarded message: > > From: Michael Rabinovich <michael.rabinovich(a)case.edu> > Subject: credit request > Date: March 21, 2019 at 2:45:45 PM EDT > To: ripe-atlas(a)ripe.net > > Folks, > > I teach computer science at Case Western Reserve University. I have a group of students working on a research project to characterize certain aspects of DNS and HTTP interactions on the Web. To get a representative measurement, we need to resolve hostnames from top-1M websites from a large number of widely dispersed probes. So we need a large amount of credits and I was wondering if I could ask folks for help. My back of the envelop calculations suggest we are short of ~200M credits. I realize it’s a large amount, but we would take any help we can get and will conduct as credible measurement as we can with the credits we assemble! Please note that my RIPE Atlas account is associated with mail alias misha(a)case.edu <mailto:misha@case.edu> (not the default email address I am sending from), so please use “misha(a)case.edu <mailto:misha@case.edu>” for credit transfer if you can help. > > Many thanks in advance! > Regards, > Michael Rabinovich > > >

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Request RIPE Atlas Credit for Research
by 陆超逸 07 Mar '19

07 Mar '19

Dear all, Greetings! I'm a PhD student at Tsinghua University, China. Recently a large-scale measurement via RIPE Atlas is needed for my research. However, as a new user I don't have any credit to proceed, and unfortunately the time doesn't allow me to earn them by myself. So I'm here to ask for help. Is it possible for anyone generous enough to offer me some RIPE Atlas credits (like, a million)? My account at RIPE NCC is lcy17(a)mails.tsinghua.edu.cn. Many thanks for your help! Sincerely, Chaoyi Lu

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Re: [atlas] ripe-atlas Digest, Vol 91, Issue 4
by Markus heptner 06 Mar '19

06 Mar '19

500.000 sent :) Markus

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Graphing packet loss
by Steve Hill 01 Mar '19

01 Mar '19

I've got some ping measurements set up and am trying to find a good way to visualise outages. The Latencymon tool obviously shows red shaded sections on the graphs for an outage, but they vanish when zoomed out a long way. A graph of average packet loss seems the obvious way of doing it, but it doesn't look like there's any way to get this from the Atlas website, sort of downloading the data and building my own tool to analyse it. Am I missing something obvious? :) -- - Steve

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