- ripe-atlas - mailman.ripe.net

Probe suddenly lost IPv6 connectivity
by Ondřej Caletka 11 Aug '14

11 Aug '14

Hi, strange thing happened today. My probe v2 #3467 suddenly lost IPv6 connectivity and reconnected to the control server using IPv4. The probe does not even respond to ping6 ff02::1%eth1 sent from the router. I wonder what could cause such behavior. I will try to reboot the probe once I'll reach it. -- Ondřej Caletka

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Probe 2092 shown as offline for a month
by David Precious 06 Aug '14

06 Aug '14

Hi there, My v1 probe #2092 has been showing as offline for a month, despite being powered up and pinging. Yesterday I power-cycled it, and it came back up and answers pings again, but the Atlas control panel still shows it as disconnected. Is there any troubleshooting I can do to get more information? I've verified that I can ping it from my internal network. There's no egress filtering which would be blocking it from talking outbound. I've just had my router log new outbound connections then power-cycled the probe again. I saw it successfully obtain an IP via DHCP (10:13:21), then 31 minutes later, connected to oneill.atlas.ripe.net (193.0.19.12) on port 443 (10:44:50) (UK times). I have verified that another box on the same network can connect to that IP & port: [davidp@columbia:~]$ telnet 193.0.19.12 443 Trying 193.0.19.12... Connected to 193.0.19.12. Escape character is '^]'. SSH-2.0-OpenSSH_5.3 Anything else I can do to provide more useful info? Cheers Dave P -- David Precious ("bigpresh") <davidp(a)preshweb.co.uk> http://www.preshweb.co.uk/ www.preshweb.co.uk/twitter www.preshweb.co.uk/linkedin www.preshweb.co.uk/facebook www.preshweb.co.uk/cpan www.preshweb.co.uk/github

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Re: [atlas] Measurements can't be stopped
by Max Grobecker 02 Aug '14

02 Aug '14

Hi, YEAH! That did the trick ;-) I've never right-clicked on these items before... Thank you! Greetings from Wuppertal, Germany Max Grobecker Am 02.08.2014 um 11:52 schrieb Iñigo Ortiz de Urbina: > Hi Max, > > On Sat, Aug 2, 2014 at 11:43 AM, Max Grobecker > <max+ratlml(a)grobecker.info> wrote: >> Hi, >> >> I tried to stop a measurement, which was defined as "end never". >> >> In order to stop the measurement I opened it, clicked "Settings" and >> unchecked "End never". >> But regardless what I choose as "End at" time, it always gets refused with >> the hint that I need to enter a valid date. >> For example, [ 2014-08-03 ] [ 00:00 ] is refused as invalid date/time. >> >> Is there any option to stop this measurements? > > You can stop measurements by right-clicking on them, and then > selecting Stop. The options that you should see after right-clicking > are: Archive, Settings and Stop. > > HTH, > >> Thank you! >> >> -- >> Greetings from Wuppertal, Germany >> Max Grobecker >> > > >

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Measurements can't be stopped
by Max Grobecker 02 Aug '14

02 Aug '14

Hi, I tried to stop a measurement, which was defined as "end never". In order to stop the measurement I opened it, clicked "Settings" and unchecked "End never". But regardless what I choose as "End at" time, it always gets refused with the hint that I need to enter a valid date. For example, [ 2014-08-03 ] [ 00:00 ] is refused as invalid date/time. Is there any option to stop this measurements? Thank you! -- Greetings from Wuppertal, Germany Max Grobecker

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Static IPv6 problem
by Jonas Byström 01 Aug '14

01 Aug '14

Hi, I have a problem when i try to set a Static IPv6 adress i get on my probe. I get: No more than 3 static DNS values may be used at any given time for either IPv4 or IPv6. I have set: 2001:4860:4860::8888 and 2001:4860:4860::8844 as DNS. What should i do to get this to work? Regards Jonas Byström

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Re: [atlas] [ripe.net #1133019] Re: Your RIPE Atlas Probe (ID: 16784) is not connected to our network
by Daniel Suchy 01 Aug '14

01 Aug '14

It's surprising, that you can't manage probe remotelly when it isn't "connected" (even you can directly reach it on L3). Technically, probe runs on Linux, so you can have SSH daemon with restricted IP access running here (listenning daemon has minimal performance overhead) - by current "behavior" you simply loose any way to diagnose problem - and dependence of established tunnel is another layer, which can fail... As stated before - simple rebooting is just a *workaround* of any issue, not a solution (but it seems that's your basic recomendation). I think you should work on improvements on probe diagnostics in such cases - new hardware versions of probes seems to be more problematic compared to older probes, as I can see also on atlas mailing list. I remember, that I had to plug out/in USB flash as some step with probe before (also your recomended "solution"). Also on probe should run some kind of watchdog, which reboots probe in case of similar problem automatically - probably it doesn't run now... With regards, Daniel On 31.7.2014 17:31, Philip Homburg wrote: > Hi Daniel, > > On Tue Jul 29 19:29:20 2014, danny(a)danysek.cz wrote: >> What checks did you performed at your side before sending such email? >> You don't have any kind of "emenergency" probe management, like SSH >> shell access directly to the device? What do you see in *your* logs >> about affected probe before it was disconnected? > > The mail gets sent when the is not connected for some time. Nothing more. > > There are no open ports on the probes. The probe can only be controlled when it is connected. > > There is some evidence in the logs that there was already something wrong with the probe when it disconnected. Most likely there is something wrong with the filesystem on the USB flash drive, but that is hard to say. > > Philip >

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Re: [atlas] Paris-traceroute variations
by FANOU Roderick 31 Jul '14

31 Jul '14

Hi all, Just a quick question. What is the real difference between a TCP paris-traceroutes and an UDP paris-traceroute ? How do the probes perform each of them? Thanks, Best regards, Roderick On 26.06.2014 13:13, Philip Homburg wrote: > Hi Juan, > > On 2014/06/19 16:59 , Juan Antonio Cordero Fuertes wrote: >> Not sure this is the right place to ask this... sorry if it is not. >> >> I'm trying to configure Paris-traceroute measurements, and it is not >> clear for me what is the meaning of the /paris/ parameter. In >> https://atlas.ripe.net/docs/udm/ it is said that it corresponds, for >> values from 1 to 16, to "the number of variations to be used for a Paris >> traceroute <http://www.paris-traceroute.net/>". What is this? Does it >> correspond to the number of initial probes to be used by >> paris-traceroute? I am unable to figure it out from the RIPE Atlas >> docs... any indication would be appreciated. > > Paris-traceroute tries to make sure that all packets of a traceroute > take the same route through a load balancer. This in contrast to > traditional traceroute where packets from different hops typically take > different routes when load balancers are involved. > > However, in the case of paris-traceroute it is still interesting to find > out if there are multiple routes or not. For this reason, the traceroute > measurement creates different variations that may take a different route. > > Each interval, it will try one variation. So if you select 16 variations > then it will take 16 intervals before you get back to the first one. > > Philip

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Re: [atlas] [ripe.net #1133019] Re: Your RIPE Atlas Probe is not connected to our network
by Daniel Suchy 29 Jul '14

29 Jul '14

There's no firewall / ACL, anything on the way, just pure L3 device. Probe worked properly, then disconnected without any logical reason with that notification received. Probe is pingable on both IPv4 and IPv6 from outside, proper (so there's no L3 issue on the way). Probe itself resets all incoming TCP connections from my IP address located in another ASN (probably due to firewall at the probe). On traffic mirrored from the probe I see ocasional NTP queries to some servers, so "something" on probe runs. Nothing else. You do not provide any access to probe for hosts to check anything directly, so I expect you can manage fully (as this is something running any kind of Linux?). As probe has public IPv4/IPv6 address, you should not have problem reach it. Unfortunatelly, probe is located on remote datacenter with limited physical access. Also this is not a solution of problem - with reboot you probably loose anything to diagnose causes of this problem. What checks did you performed at your side before sending such email? You don't have any kind of "emenergency" probe management, like SSH shell access directly to the device? What do you see in *your* logs about affected probe before it was disconnected? With regards, Daniel On 22.7.2014 11:17, Alastair Strachan wrote: > Hello Daniel, > > Thanks for your email. > > It would appear there is something on your network blocking the probe from connecting outside your network. Could I ask you to double check to ensure there is no security/firewall rule that has been updated or needs updating to allow the probe a clean connection outside your network. > > I would also recommend trying a complete power recycle on the probe. > > Thank you for taking the time to host a RIPE Atlas probe. > > If you have any further questions, please let me know > > Kind Regards, > > Alastair Strachan > > RIPE Atlas Team > > RIPE NCC Customer Satisfaction Survey > Tell us about your customer services experience by filling out the anonymous, three-question RIPE NCC customer satisfaction > > survey:https://www.ripe.net/contact/survey/satisfaction-cs/ > >> >> On 18.7.2014 05:40, RIPE Atlas wrote: >>> Dear RIPE Atlas probe host, >>> >>> Thank you for participating in RIPE Atlas! >>> >>> We have noticed that your probe is not connected to our infrastructure and has been >> disconnected since 2014-07-11 03:15 UTC. Could you please check >> whether everything is set up correctly on your side? If it is, and >> your probe is still reported as disconnected when you log in at >> https://atlas.ripe.net, please reply to this email so that we can >> follow up. >>> >>> You can review the instructions for setting up your probe at >> https://atlas.ripe.net/getting-started >>> >>> If you have any questions, please contact us at atlas(a)ripe.net >>> >>> Best regards, >>> >>> RIPE Atlas Team >>> >>> ********** >>> You are receiving this message because you applied for or were given >> a RIPE Atlas probe. We will only send messages when your probe >> becomes disconnected for an extended period of time. >>> >> > >

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Fwd: Probe 2317 (home fibre) is disconnected
by Colin Johnston 29 Jul '14

29 Jul '14

strange, connectivity seems fine to me at least within BT network range and HSO network range ? Should I reset the probe or this is a bigger monitoring probe failure ? Colin Begin forwarded message: > From: RIPE Atlas <atlas(a)ripe.net> > Subject: Probe 2317 (home fibre) is disconnected > Date: 29 July 2014 12:30:05 BST > To: colin johnston <colinj(a)mx5.org.uk> > Delivered-To: colinj(a)mx5.org.uk > Received: by 10.70.41.145 with SMTP id f17csp332256pdl; Tue, 29 Jul 2014 04:30:32 -0700 (PDT) > Received: from koko.ripe.net (koko.ripe.net. [2001:67c:2e8:11::c100:1348]) by mx.google.com with ESMTPS id f10si19194016wic.74.2014.07.29.04.30.19 for <colinj(a)mx5.org.uk> (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 29 Jul 2014 04:30:20 -0700 (PDT) > Received: from janus.atlas.ripe.net ([193.0.19.13]) by koko.ripe.net with esmtps (UNKNOWN:AES256-GCM-SHA384:256) (Exim 4.72) (envelope-from <atlas(a)ripe.net>) id 1XC5bZ-0004TU-Nf for colinj(a)mx5.org.uk; Tue, 29 Jul 2014 13:30:08 +0200 > Received: from localhost.localdomain ([127.0.0.1] helo=janus.atlas.ripe.net) by janus.atlas.ripe.net with esmtp (Exim 4.72) (envelope-from <atlas(a)ripe.net>) id 1XC5bZ-00004y-IA for colinj(a)mx5.org.uk; Tue, 29 Jul 2014 11:30:05 +0000 > X-Received: by 10.180.75.230 with SMTP id f6mr41435469wiw.5.1406633431897; Tue, 29 Jul 2014 04:30:31 -0700 (PDT) > Return-Path: <atlas(a)ripe.net> > Received-Spf: none (google.com: atlas(a)ripe.net does not designate permitted sender hosts) client-ip=2001:67c:2e8:11::c100:1348; > Authentication-Results: mx.google.com; spf=neutral (google.com: atlas(a)ripe.net does not designate permitted sender hosts) smtp.mail=atlas(a)ripe.net > Content-Type: text/plain; charset="utf-8" > Mime-Version: 1.0 > Content-Transfer-Encoding: 7bit > Message-Id: <20140729113005.32636.40047(a)janus.atlas.ripe.net> > X-Ripe-Spam-Level: / > X-Ripe-Spam-Report: Spam Total Points: 0.4 points pts rule name description ---- ---------------------- ------------------------------------ -1.0 ALL_TRUSTED Passed through trusted hosts only via SMTP -0.7 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] 4.0 DCC_CHECK Detected as bulk mail by DCC (dcc-servers.net) > X-Ripe-Signature: 407c82a9d3629e01ca957e4b84b7f67191521e4a20cb459dafae86d3fab252b9 > > Dear colin, > > Your probe 2317 has been disconnected since 2014-07-29 10:38:01 UTC. > > This is an automatically generated email from RIPE Atlas. It was sent to you because you asked to be notified if your probe becomes disconnected for more than 30 minutes. > > If you want to change this, or disable this notification altogether, please go to https://atlas.ripe.net/probes/2317/, and click the "edit" button under "Notifications". > > Kind regards, > > RIPE Atlas Team

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probe selection criteria on "WW" measurements
by Paul Vlaar 25 Jul '14

25 Jul '14

Hi, I have two questions regarding probe selection for UDMs. When I specify for example that I want to run an ongoing measurement on 250 probes in the "WW" region, will these probes remain the same throughout the lifecycle of the measurement (unlimited) or will these be somehow randomized every time the measurement is run? Secondly, I am wondering about even spread of probe location in doing such a measurement. For instance I am as much interested in results from regions that have only a few probes, as I am interested in results from those regions that are better served. When I look at the results so far of a test measurement, it appears that I'm receiving results from 35 probes in US, but only 3 from FI and none from NO. The latter surprises me a bit since there are 100 probes reported in NO, so why aren't there any results from those coming back? While I understand that countries with more probes will likely yield more results, I am wondering if there is any method to get a better "country-balanced" result for measurements ran in "WW". Thanks, ~paul -- Paul Vlaar DNS Infrastructure Group Afilias e-mail: pvlaar(a)afilias.info phone: +1-416-673-4078 mobile: +31-6-506-306-35 mobile USA: +1-602-410-4148

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