swinog March 2026

swinog@lists.swinog.ch

18 participants
14 discussions

### SwiNOG #41 (2026-04-28) - Call for Papers ###
by Simon Ryf 24 Jul '26

24 Jul '26

Dear SwiNOG community, Please forward me to whomever you think should know about our community and the upcoming event. This is the official Call for Paper email. Please submit your proposal via https://www.swinog.ch/cfp/ The 41st meeting of the Swiss Network Operators Group (SwiNOG) will be held in Berne on top of the Gurten on Tuesday April 28th, 2026. Location: https://wego.here.com/l/46.91963060309784,7.439032069847434 Important Dates for http://www.swinog.ch/meetings/swinog41/ 30.01.2026 Call for Papers 02.02.2026 Registration opens -> https://register.swinog.ch/ 29.03.2026 Publication of preliminary agenda 19.04.2026 Registration closes 24.04.2026 Deadline for all slides 28.04.2026 Meeting Day Topics for Presentations/Talks Please re-submit your paper if you're still up with a topic which you have submitted earlier. The number and length of presentations per session is not fixed, although we prefer it to be between 5 to 30 minutes. Here is a non-exhaustive list of typical SwiNOG meeting topics: * Security, DDOS Mitigation, * IPv6 * Open-Source- / GitHub projects * International view of the internet (incidents, outages, measurements) * Routing & Peering * Applications (DNS, Web, Network Virtualization, Orchestration, Monitoring etc.) * Takeaways from your projects / troubleshooting-sessions * Legal issues (BÜPF, etc.) * Telecommunication politics (Net Neutrality, Incumbent monopoly, etc.) * Off-Topic if you think the audience will enjoy Feel free to talk to us about any kind of topic and collaboration! Or you can always start a discussion on the list - I'm sure people join in. Or join our telegram group at https://t.me/SWINOG Language of Slides and Talks The whole day will be hold in English, therefore we kindly ask you to produce your presentation in English. Submission Guidelines * All submissions must have a strong technical bias and must not be promotional. * We also welcome lightning talks (3-5 Minutes). If entertaining – they can also be completely off-topic. * Presentations should be suitable for a target audience of technicians from varied backgrounds, working for companies whose sizes may vary considerably. * Presentation will be published (PDF) on the SwiNOG website after the event (if confirmed/permitted by the speaker). * On request we publish modified slides (removed confidential content, etc.) * Presentations should be suitable for a target audience of technicians from varied backgrounds, working for companies whose sizes may vary considerably. To submit a proposal for a presentation, please fill in the form at https://www.swinog.ch/cfp/ We also welcome suggestions for specific presentations which you feel would be valuable to the SwiNOG community and we try to chase a speaker for it. Greetings, Simon SwiNOG Core Team swinog-core(a)swinog.ch<mailto:swinog-core@swinog.ch> General Information (SwiNOG Community) The Swiss Network Operators Group (SwiNOG) is an informal group of people who are concerned with engineering and operation of the Swiss Internet. SwiNOG exists to enhance the quality of Internet services available in Switzerland. It does this by fostering the free exchange of technical ideas and information between different companies and organisations. SwiNOG is a community for professionals who are operating, designing, or researching the Internet. It provides a technical forum where those working on, with and for the Internet can come together to solve problems with every aspect of their (net)work. The meeting is designed to provide an opportunity for the exchange of information among network operators, engineers, researchers, and other professionals close to the network community. More information about SwiNOG can be found at http://www.swinog.ch<http://www.swinog.ch/> Information about the meeting will be published at http://www.swinog.ch/meetings/swinog41/ General Information (SwiNOG Organisation) The SwiNOG Organisation Association is a non-profit association under article 60 and further of the swiss civil law. It manages the SwiNOG community ressources (domain, web, mailing-lists, etc..) and organises SwiNOG meetings. Contact: SwiNOG Organisation 8000 Zurich Switzerland

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[Survey] When do you upgrade your network?
by Romain Jacob 27 Mar '26

27 Mar '26

Dear all, [My apologies if you receive multiple copies of this message] TL;DR I lead an academic research project to better understand the motives behind network hardware upgrades. If you are operating a network infrastructure and have 10 minutes to spare, we would greatly appreciate you filling out this short (anonymous) survey: https://tally.so/r/rjEkZR == Longer version == My name is Romain; I am a senior scientist at ETH Zürich, Switzerland, where I research the environmental impacts of Internet infrastructure and how we can steer networks to become more sustainable in the future. There is increasing evidence that a large part of the Internet's impact comes from the manufacturing, deployment, and recycling of hardware, suggesting that networks could substantially reduce their footprint by keeping network devices in operation for longer, despite possibly higher energy consumption in older hardware models. Some of my ongoing research aims to assess whether this hypothesis is correct; happy to tell you more about that if you are interested. Assuming it is indeed correct that network hardware should be kept in operation for longer, if we want to encourage this, we must understand why networks are being upgraded today. * What are the main motives behind network hardware upgrades nowadays? * What factors are preventing or discouraging longer hardware lifetime in networks? We prepared a short survey to help answer those questions. After some brief contextualization questions to clarify the network type and context, the core of the survey presents a list of possible motives for hardware upgrades and asks, for each, how important it typically is in your own network upgrades. The second half of the survey contains (optional) questions related to the current environmental sustainability practices in your organization. If you are operating a network or working for an organization that operates a public or private network infrastructure, we would greatly appreciate you filling out this short (anonymous) survey: https://tally.so/r/rjEkZR And, naturally, you are more than welcome to share this survey within your own network (of humans, I mean). Many thanks in advance! — Romain -- Romain JACOB Postdoctoral Researcher ETH Zurich Networked Systems Group (NSG) Lead: Prof. Laurent Vanbever www.romainjacob.net <https://www.romainjacob.net/> @RJacobPartner <https://twitter.com/RJacobPartner> @jacobr@discuss.systems <https://discuss.systems/@jacobr> Gloriastrasse 35, ETZ G84 8092 Zurich +41 7 68 16 88 22

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SwiNOG #41 - Sold out / Waiting list
by Simon Ryf 25 Mar '26

25 Mar '26

Dear SwiNOG community, We are overwhelmed by the demand for seats for the upcoming event. While this is great news for everyone who already secured a ticket, we understand that it is frustrating for those who would still like to attend but have not been able to get one. We are currently in contact with the venue to see whether it is possible to increase capacity, but at this stage we cannot make any promises. If you do not have a ticket yet but would like to attend, please send an email to core(a)swinog.org with the subject “Waiting list” and a short message. Should we be able to release additional tickets, we will contact people on the waiting list in chronological order. BTW: We’re planning to release the agenda by the end of this week. Confirmation mails to the speakers are being prepared right now. Thank you and hope to see you at SwiNOG #41 SwiNOG Core Team

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tempfail issues with: mailout01.mail.admin.ch
by Benoît Panizzon 24 Mar '26

24 Mar '26

Hi Are others also experiencing issues when temp failing arbitrary recipients from mailout01.mail.admin.ch ? To explain the situation: Our spamfilter gives the recipient to choice to either reject, quarantine aka spamfolder or accept an email classified as spam. Example: Alice sends spam to Bob and Charlie Bob wants spam rejected Charlie wants spam quarantined. Spam can only be rejected after the DATA phase, when both recipients have been accepted during RCPT TO. Dropping Bob from the recipient list and only delivering to Charlie is a NO GO, we confirmed the RCPT TO to Bob with 250 so we have to deliver. Rejecting the whole email does contradict the setting of Charlie. To solve this, we tempfail any recipients whose spam settings differ from the first recipient like this: MAIL FROM:<alice(a)example.com> 250 2.1.0 Ok RCPT TO:<bob(a)example.net> 250 2.1.5 Ok RCPT TO:<charlie(a)example.net> 452 4.5.3 Resend separately 452 4.5.3 is the same code used to indicate 'too many recipients' and therefore triggers an immediate fork of the original message to the remaining recipients on the sending MTA usually without any notable delay. The only server which seems to regularly stop transmitting the email to the remaining recipients and returns a 'hard bounce' to the sender after having sent the email to 'some' of the recipients is mailout01.mail.admin.ch Anyone observing the same issue? Anyone having a contact at BIT which could help with further investigation into the cause of the issue observed? I attempted to open a case some time ago but got no where. -- Mit freundlichen Grüssen -Benoît Panizzon- @ HomeOffice und normal erreichbar -- I m p r o W a r e A G - Leiter Commerce Kunden ______________________________________________________ Zurlindenstrasse 29 Tel +41 61 826 93 00 CH-4133 Pratteln Fax +41 61 826 93 01 Schweiz Web http://www.imp.ch ______________________________________________________

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sbb.ch unresponsive on IPv6 for HTTP(S)
by Beni Keller 24 Mar '26

24 Mar '26

Hey all This might not be 100% the correct place to ask this but since the SBB contact form didn't yield any results, I'll try here. Maybe someone from SBB who knows someone who can do something about this reads the list. There are A and AAAA records for sbb.ch: $ dig AAAA sbb.ch +short 2a00:4bc0:ffff:9::c296:f58e $ dig A sbb.ch +short 194.150.245.142 However, on port 80 and 443 I only get a response on IPv4, a 301 to http(s)://www.sbb.ch. On IPv6 it just times out without any response: $ curl -6 https://sbb.ch -v * Host sbb.ch:443 was resolved. * IPv6: 2a00:4bc0:ffff:9::c296:f58e * IPv4: (none) * Trying [2a00:4bc0:ffff:9::c296:f58e]:443... * connect to 2a00:4bc0:ffff:9::c296:f58e port 443 from 2001:8e0:1426:1:47d6:12fd:bc19:5704 port 55992 failed: Connection timed out * Failed to connect to sbb.ch port 443 after 133922 ms: Could not connect to server * closing connection #0 curl: (28) Failed to connect to sbb.ch port 443 after 133922 ms: Could not connect to server tcpdump doesn't show any response packets at all. This is mainly an issue on our IPv6-only clients where we use DNS64/NAT64. So the preferred solution would be for someone to fix IPv6. However, removing the AAAA DNS record would also solve the issue because then the resolver generates a DNS64 response and we connect to IPv4 over NAT64. Hope someone can help. It's a bit of a shot in the dark. Let me know it this is completely inappropriate to be posted on this list. Thanks and regards Beni

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Re: Facebook Account blocked / Legal Contact Swiss
by Patrick Studer 23 Mar '26

23 Mar '26

Hi Andreas > Am 23.03.2026 um 10:01 schrieb Andreas Fink <afink(a)list.fink.org>: > > > On 23.03.2026 09:09, Patrick Studer wrote: >> Hi Andreas >> >> That’s the reason, I was deleting my account 3 years ago. But unfortunately, there are to many sites and groups just organized within Facebook. I assume, it’s because it’s „free“ and in some regions of the world, people don’t have to much money to spend in professional websites. > > > well then these groups are not professional and dont deserve to be considered. Just the data protection aspect of this is a nightmare. GDPR etc... For Restaurant etc. I could probably life with it, but there are some groups which exist long time and they shared there experience with a product (about 7-8000 members). Even I can push them to move away from Facebook, how can they migrate all the gathered and shared experiences to a new platform. > >> >> At least, in metaverse, you are not blocked from content, if you don’t have an account (as far as i know). >> I assume, Facebook is the easiest and least cost way to have a presence in the WWW and the largest user base. > > > I strongly disagree on that. All smart people are not on Facebook anymore. Maybe the chat lover's group is still there. Similar is the case with Twitter now known as X since Elon killed the API rendering all useful 3rd party clients useless. Sorry, mixed up the name. I was talking about Fediverse about open access to content, not metaverse. > >> Like I said earlier, I would prefer to not have an account and have access to those sites and groups, but that’s not possible (today). > > > Well you should address the people which are still there and question their doing why they are pushing others to give away their privacy to an american collecting machine. > > You will live much better that way. Agreed on that one. What would you recommend for them als (free) alternative?

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Re: Facebook Account blocked / Legal Contact Swiss
by Patrick Studer 23 Mar '26

23 Mar '26

Hi Andreas That’s the reason, I was deleting my account 3 years ago. But unfortunately, there are to many sites and groups just organized within Facebook. I assume, it’s because it’s „free“ and in some regions of the world, people don’t have to much money to spend in professional websites. At least, in metaverse, you are not blocked from content, if you don’t have an account (as far as i know). I assume, Facebook is the easiest and least cost way to have a presence in the WWW and the largest user base. Like I said earlier, I would prefer to not have an account and have access to those sites and groups, but that’s not possible (today). Kind Regards Patrick Studer > Am 22.03.2026 um 11:52 schrieb Andreas Fink <afink(a)list.fink.org>: > > better to simply ditch facebook completely. Done that many many years ago and never regreted it. > > People who only publish info on Facebook are not serious and are ignoring the reality. Like the ones on the Metaverse. > > > > > > On 21.03.2026 10:37, Patrick Studer via swinog wrote: >> Hi Simon >> >> I didn’t assume to get legal help directly, instead I hoped, someone already had some case and knows, which organization can help in such a situation (if there is such an organization in Switzerland for such issues) and point me in the right direction. >> >> Unfortunately, if you don’t have an account, you are not able to access any facebook sites in full, instead, you are only able to access the last post and the facebook will ask you to login (see attached screenshot). >> >> Of course could someone create a fake account. I don’t know, how far facebook is fingerprinting someone’s devices, so it will probably detected, that I’m the same person? >> >> Kind Regards >> >> Patrick >> >> >> >> >>> Am 21.03.2026 um 10:22 schrieb Simon Ryf via swinog <swinog(a)lists.swinog.ch> <mailto:swinog@lists.swinog.ch>: >>> >>> Hi Patrick, >>> >>> This is not the right corner to get legal help for US Big-Tech. >>> >>> But IMHO you should approach this differently. >>> Your Goal: Access company Sites on Facebook >>> >>> This can be done IMO without a Facebook account e.g. https://www.facebook.com/migros >>> And if you need one - why don’t you create a fake one? >>> >>> br >>> Simon >>> >>> FYI. I’m NOT starting a discussion here ;-) >>> >>> >>> >>> From: Patrick Studer via swinog <swinog(a)lists.swinog.ch> <mailto:swinog@lists.swinog.ch> >>> Date: Saturday, 21 March 2026 at 08:04 >>> To: swinog(a)swinog.ch <mailto:swinog@swinog.ch> <swinog(a)swinog.ch> <mailto:swinog@swinog.ch> >>> Subject: [swinog] Facebook Account blocked / Legal Contact Swiss >>> >>> Hi >>> >>> I know, it’s perhaps not the right/correct place to post this, but I hope, that some of the (bigger) ISP probably stumbled over such issues and know, which (legal) way is possible for swiss user. >>> >>> I had a personal account Facebook Account and decided to let it be deleted through Facebook in 2023, since I din’t have used it to much. >>> >>> During our travels, we noted, that many places around the world only have a facebook page instead of (old style) webpage. >>> >>> So I decided to recreate my Facebook account. Unfortunately, I missed a confirmation mail (the only mail from facebook, which went to the spam folder). When I later saw it and clicked it, I got a message, that my account has been temporarily disabled and I have 180 day to proof my Identity by video call. >>> >>> At first, I wanted to do that, but decided two weeks later during travel and again unable to access some local Restaurants Facebook site, to do the video call. After I did that, I received within minutes the information, that my account has definitely blocked and I can’t ask Facebook to recheck the decision, instead, if my country has some instances, which I can ask for help. >>> >>> As I found out later, this seems some kind of AI issue, where people get blocked from Facebook for no obvious reason. >>> >>> Personal, I find this unacceptable, that someone is blocked for now reason and there is no contact on Facebook site, where someone can ask to review this decision. Instead, you have to ask a Laywer. WFT! But since there are so many „Free“ Facebook sites from small Business/Restaurant all around the world and some interesting groups, with valuable information, I would really like to have an account, so I can access those information. >>> >>> So, hence I ask here, if someone knew, which organization in Switzerland can help with such an issue. >>> >>> Attached, you can see the message, which is greeting me, when I try to login to Facebook. >>> >>> Thanks for any help. >>> >>> Kind Regards >>> >>> Patrick Studer >>> >>> >>> >>> <PastedGraphic-1.png> >>> _______________________________________________ >>> swinog mailing list -- swinog(a)lists.swinog.ch <mailto:swinog@lists.swinog.ch> >>> To unsubscribe send an email to swinog-leave(a)lists.swinog.ch <mailto:swinog-leave@lists.swinog.ch> >> >> >> >> _______________________________________________ >> swinog mailing list -- swinog(a)lists.swinog.ch <mailto:swinog@lists.swinog.ch> >> To unsubscribe send an email to swinog-leave(a)lists.swinog.ch <mailto:swinog-leave@lists.swinog.ch>

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Facebook Account blocked / Legal Contact Swiss
by Patrick Studer 21 Mar '26

21 Mar '26

Hi I know, it’s perhaps not the right/correct place to post this, but I hope, that some of the (bigger) ISP probably stumbled over such issues and know, which (legal) way is possible for swiss user. I had a personal account Facebook Account and decided to let it be deleted through Facebook in 2023, since I din’t have used it to much. During our travels, we noted, that many places around the world only have a facebook page instead of (old style) webpage. So I decided to recreate my Facebook account. Unfortunately, I missed a confirmation mail (the only mail from facebook, which went to the spam folder). When I later saw it and clicked it, I got a message, that my account has been temporarily disabled and I have 180 day to proof my Identity by video call. At first, I wanted to do that, but decided two weeks later during travel and again unable to access some local Restaurants Facebook site, to do the video call. After I did that, I received within minutes the information, that my account has definitely blocked and I can’t ask Facebook to recheck the decision, instead, if my country has some instances, which I can ask for help. As I found out later, this seems some kind of AI issue, where people get blocked from Facebook for no obvious reason. Personal, I find this unacceptable, that someone is blocked for now reason and there is no contact on Facebook site, where someone can ask to review this decision. Instead, you have to ask a Laywer. WFT! But since there are so many „Free“ Facebook sites from small Business/Restaurant all around the world and some interesting groups, with valuable information, I would really like to have an account, so I can access those information. So, hence I ask here, if someone knew, which organization in Switzerland can help with such an issue. Attached, you can see the message, which is greeting me, when I try to login to Facebook. Thanks for any help. Kind Regards Patrick Studer

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IANA AS Numbers Registry Update
by David Dong 15 Mar '26

15 Mar '26

Hi, The IANA AS Numbers registry has been updated to reflect the allocation of the following blocks to ARIN: 402333-403356 Assigned by ARIN 2026-03-14 403357-404380 Assigned by ARIN 2026-03-14 You can find the registry at: https://www.iana.org/assignments/as-numbers/ The allocation was made in accordance with the Policy for Allocation of ASN Blocks to Regional Internet Registries: https://www.icann.org/resources/pages/global-policy-asn-blocks-2010-09-21-en Best regards, David Dong IANA Services Sr. Specialist

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Cyon public Blacklist usage
by Erich Hohermuth 13 Mar '26

13 Mar '26

Dear all, One of our residential customers is no longer able to reach his domain hosted by Cyon. According to their support, this is caused by a bad score from RBLs. A quick check shows that these RBLs are dedicated to mail, not hosting. Did I miss a new magic bullet in the hosting scene where scoring is used for website access? If you feel directly responsible, please contact me off-list. Best regards, Erich

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