Chaos Computer Club - archive feed

I'm not big-brained enough to use cameras on Linux, so I decided to write my own camera stack (based on a real story). The libobscura experiment exists to find out what a point-and-shoot API abstracting Video4Linux should look like. It has its roots on one hand in the Librem 5 project, where I wrote some 70% of the camera stack, and on the other hand in libcamera, which I found too difficult to use. You think controlling a modern camera is easy? Think again. Between pixel formats, depths, media entities, pads and links, sensitivity, denoising, phase detection, shutter lengths, DMAbuf, OpenGL, feedback loops, requests, and statistics, there's enough opportunities to get lost in the detail. Thankfully, Prototype Fund thinks I'm up for the challenge, so they are funding me through libobscura in order to get lost, and maybe find something in the process. Project repo: https://codeberg.org/libobscura/libobscura Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://events.ccc.de/congress/2024/hub/event/libobscura-cameras-are-difficult/

Glad you could make it! Take a seat and buckle up for a ride through four days of chaotic adventures. This ceremony will prepare you for the 38C3 in all its glory, underground and above, hacks and trolls, art and radical ideas. Let's kick this thing off together! Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://events.ccc.de/congress/2024/hub/event/38c3-opening-ceremony/

Team Leads give a short update about the current status of their planning. Licensed to the public under https://creativecommons.org/licenses/by/4.0/ about this event: https://c3voc.de

Jeden Tag hinterlassen wir unbewusst Unmengen an Datenspuren. Diese Daten werden laufend durch unterschiedliche Parteien gesammelt, ausgewertet und analysiert. Dies häufig, ohne unser Wissen. Von vielen solcher Auswertungen profitieren wir direkt oder indirekt. Zugleich schlummert in solchen Datenpraktiken aber auch das Potenzial, Menschen oder Gesellschaften negativ zu beeinflussen. Die Ethik beschäftigt sich entsprechend vermehrt mit dem Bereich der Datenethik. Was macht die Nutzung von Daten fair? Wie stehen Datenpraktiken im Verhältnis zum Recht auf Privatsphäre? Was haben wir für Erwartungen an Organisationen? Wie kann jede:r Einzelne mit Daten ethisch umgehen und zur Datenethik beitragen? Diese und weitere Fragen diskutiert Nicole Pauli mit Cornelia Diethelm (Expertin für Digitale Ethik) und Veronika Ludwig (Swiss Data Alliance). Cornelia Diethelm ist Expertin für Digitale Ethik und vermittelt zwischen der Wirtschaft und den Erwartungen der Gesellschaft. Sie setzt sich mit strategischen Trends auseinander und gibt ihr Wissen auch als Studiengangsleiterin und Dozentin für Digitale Ethik an der Hochschule für Wirtschaft Zürich weiter. Sie ist ausserdem Mitglied in drei Verwaltungsräten. Veronika Ludwig ist Juristin mit Schwerpunkt im Europäischen und Schweizer Datenschutz und in der Data Governance. Sie bringt über 17 Jahre Berufserfahrung als In-House Counsel im Konzernumfeld in der Logistik-Branche und dem Bankwesen mit. Als Vorstandsmitglied der Schweizer Data Privacy Community und aktive Mitgestalterin und Datenschutzberaterin bei Swiss Data Alliance engagiert sie sich für eine zukunftsorientierte und ethische Datenpolitik. Ihr besonderes Interesse gilt der Entwicklung rechtlicher Rahmenbedingungen, die die Nutzung von Gesundheitsdaten fördern und gleichzeitig die Patientenrechte wahren. about this event: https://www.digitale-gesellschaft.ch/event/netzpolitischer-abend-zu-datenethik-in-der-schweiz/

Thank you for joining us for DENOG16, join us for a quick review and some announcements before heading home! Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.com/denog16/talk/P8QBJW/

This talk will give an overview of DTs DNS platform and the challenges arising from carrier scale DNS deployments. It will cover the architecture and new requirements as well as scalability and the implementation status and impact of encrypted DNS (e.g., DoH/DoT and DNS discovery). The presentation will also address shortcomings of the new discovery mechanisms which are currently being standardized within IETF. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.com/denog16/talk/GJGBFQ/

News from IXPs in Germany As introduced 2021 we collect some parameters from all IXPs, which are active in Germany. This talk aggregates the Updates for all the IXPs in a common format and will be presented in a neutral way. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.com/denog16/talk/Y9RMD9/

In this talk, we explore the changes needed to convert a set of fully open source amd64 based VPP routers running in AS8298 to be able to use exactly one IPv4 and IPv6 address in an OSPFv3 and iBGP configuration. The use of /30 or /31 IPv4 transit networks between routers is a thing of the past, paving the way to conserve IPv4 addresses! The talk discusses the changes made to VPP and a popular routing suite Bird2, to enable both Babel and OSPFv3 to route traffic without using IPv4 transit networks, including operational notes how the author rolled this out in AS8298. Finally, the author will make good on his promise from previous DENOG, predicting a 1Tbps VPP machine. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.com/denog16/talk/YGU3SW/

Metro networks are arguably one of the more challenging areas in carrier network engineering: Feature creep, space constraints, harsh physical environments and the requirement to deliver all services everywhere, for cheap. At Wobcom AS9136 we _just_ wanted to modernize the transport network. Two years later we ended up redesigning just about everything: Putting white box routers into outdoor shelters, moving subscriber services to the edge and rethinking business CPEs. This talk covers our journey and what design considerations lead us where we are. We will explore a wide range of linked topics: - Environment (Power, Space, Temperature) - Optical problems and solutions (OWDM, OpenZR+) - Network ASICs - Network Operating Systems - Protocols (MPLS, SR, EVPN, etc.) - Subscriber Management - Full Automation - CPEs and their management Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.com/denog16/talk/ZDGXDY/

We had to move a couple of hundred machines from a big Layer 2 broadcast domain into a fully routed network. We also increased the bandwidth available for each server by mounting a new NIC into each server, To avoid synchronisation with service owners, we did not renumber hosts. In addition, there is connectivity to the large Layer 2 domain that is still in place and still has a few thousand hosts in need of migration. In this talk you will learn how we engineered this migration, minimised downtime and ensured the documentation of our network is always up to date. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.com/denog16/talk/WNS7MA/

The Domain Name System (DNS) is a critical component of the Internet infrastructure, responsible for translating human-readable domain names into machine-readable IP addresses. However, the increasing centralization of DNS traffic through large content-delivery hyper-giants (such as Google), coupled with the fact that the majority of DNS communication traditionally runs over unencrypted transports (UDP/TCP), has led to increased security and privacy concerns. In this talk, I will present recent results on the resiliency and efficiency of DNS, the state of adoption of protocols that enable DNS privacy and their performance implications. I will conclude with a future outlook of a protocol design whereby traditional communications no longer have to trade performance for privacy, but can achieve the best of both worlds: privacy-enhancing DNS + secure communication on the Web. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.com/denog16/talk/SLHTY7/

DDoS attacks and attackers are out there today, and likely won't go away anymore. This talk will outline some current available technologies and developments in the area of DDoS countermeasures, which are designed to make DDoS detection faster, provide better information and decision criteria on what is currently going on in a network, and what is required to mitigate attacks with as few as possible unwanted side effects. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.com/denog16/talk/TG9GBD/

As communication speeds increase, a new problem of communication errors caused by "return loss" has become apparent in optical connector connections. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.com/denog16/talk/LYC7PW/

Everything uses IP nowadays but some stuff is special: Telephony. The connection between customers and their provider is well known but the interconnections of providers themselves are something different. This talk covers the German market, other countries work totally different (some examples might be given). Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.com/denog16/talk/HSQJC7/

Following up on last year's introductory talk about NIS2 and the cybersecurity regulations, we'll look at the technical and methodological requirements specifically for digital service providers. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.com/denog16/talk/Y88EBE/

That's a wrap for day1, we'll share all details about the social and how to get there! Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.com/denog16/talk/38JPGU/

This presentation investigates the proximity to a low Signal-to-Noise Ratio (SNR) threshold that can still maintain a tolerable Bit Error Rate (BER) in 100G / 400G / 800G network links. Additionally, we account for factors such as temperature and cable length to predict the duration for which a reliable network connection can be sustained between transceivers. The analysis, based on data retrieved using a Flexbox, focuses on comparing the reliability of coherent (16QAM) and non-coherent (PAM4) transceivers, with a detailed discussion on the implications of these technologies on network performance. For a better understanding of the correlation between these factors, Machine Learning techniques were used. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.com/denog16/talk/KBFMT3/

Starting with 1st of January, 2026, operators of public mobile networks in Germany are obliged to employ certified network products within their networks. The obligation affects all network products, which are newly introduced into public mobile networks and provide functions, for which a security assessment document has been approved by the BSI. This also includes network products, which provide 3GPP-specified functionalities and are listed in the list of critical functions by the Federal Office for Information Security (BSI) and the Bundesnetzagentur (BNetzA). The talk will address the necessary steps by operators of public mobile networks to successfully include certification of network products into their procurement and onboarding processes. Therefore, the talk will showcase the technical approaches taken in the certification process and how they are intended to interplay with provider processes. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.com/denog16/talk/BHTKAJ/

The so-called ‘Glasfaserstreit' (fibre optic dispute), an antitrust case, successfully prevented the intention of the incumbent to monopolise the Swiss fibre optic network. As a result, >2 million households can currently subscribe to a symmetrical 25 Gigabit FTTH connection for ~€70 per month. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.com/denog16/talk/DJAA3V/

Single peering interfaces can get loaded during peak usage and/or failure scenarios while the network as a whole still has spare capacity. As remedy we can use upstream via our so-called overflow providers. In normal operation mode we will prefer direct peerings and only use overflow providers as fallback. For events like the European Football Championship we want to be able to shift traffic to those fallback routes with low effort, low wait times, high granularity and high confidence. We have implemented a service that injects on-demand copies of the existing fallback routes with the preferences tuned to let them be preferred over the "normal" peering routes. The routes are advertised via BGP sessions to our routers and are not distributed any further. The service is using GoBGP and running in Kubernetes. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.com/denog16/talk/NCYK9Q/

In this session we are going to cover usage of RFC8950 (IPv4 NLRIs with IPv6 Next Hop) Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.com/denog16/talk/BWWEJ7/

SCION is a secure path-aware Internet architecture, designed to achieve high resilience to routing attacks and path selection for Internet users and operators with safety critical traffic such as in financial and healthcare sectors. RPKI/ROV is useful for origin validation but does not validate paths, ASPA is still an evolving technology, whilst BGPSEC has yet to be widely deployed and needs explicit router support along a path to achieve the full benefits. SCION has commercial and open-source implementations and is in production use by the financial services and healthcare industry in Switzerland and internationally. This includes the SCION Research & Education Network (SCIERA) which includes connections to OVGU Magdeburg. It is also currently being evaluated for use in government, power utility, aviation, military and other applications, with a number of vendors interested in implementing it in their products. This talk will discuss the SCION design and architecture, its trust model, how it can be deployed, as well as some deployment experiences to-date. It will also discuss the IETF/IRTF work, and the community efforts supported by the SCION Association to encourage further deployment and development. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.com/denog16/talk/GZAQ7E/

There are plenty of seismic stations on land helping detect and record earthquakes but very little deployed in our sea’s and oceans. Marine seismic detectors have traditionally been expensive, unreliable and not widely deployed. In recent years, research has shown that new and existing submarine cables can be used to detect seismic activity. Given that two thirds of our planet is covered by Oceans, this new development provides a great opportunity to improve our knowledge of the geological activity of our planet. Additionally, an early warning of an imminent Tsunami can save thousands of lives. This presentation will introduce the recent developments in sensing on Submarine Fibre Optic Cables and introduce the key sensing technologies employed. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.com/denog16/talk/SVMJWM/

In recent years, we’ve heard a bit more about submarine cables, mostly related to fiber cuts. Given that they’re lifelines of countries or even continents, they are important, yet we know little about them. So, what’s the rationale behind the large selection of submarine cables, often on the same route? Is it just about resiliency and shorter routes, or are there other differentiators? This talk will provide insight into the construction, operation, maintenance, and selection of submarine cables, using the connections between the United Kingdom and Continental Europe as an example. We will dive into what it takes to construct a submarine cable, discover why and how it breaks, and provide guidance on what to consider when purchasing. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.com/denog16/talk/CKRBRG/

This year we deployed a new data center fabric from scratch. A requirement was to use different vendors with different nos. In addition we use Ansible for the whole configuration. This talk is about: - how to efficiently use Netbox with Ansible - using Ansible with multi vendor equipment - challenges building a multi vendor EVPN fabric from scratch Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.com/denog16/talk/DSWSHD/

In response to increasing regulatory pressures, major telecommunications providers have begun to measure and report their carbon footprints. However, this initial step is just the beginning of a complex journey toward achieving sustainability. One of the most significant challenges these companies face is addressing Scope 3 emissions, which are generated by their supply chains and lie outside their direct control. In this presentation, I will discuss the current state of sustainability efforts within the telecom industry, with a particular focus on the intricacies of reducing Scope 3 emissions. Rather than offering quick fixes, I will explore practical approaches companies can consider, such as switching to more sustainable suppliers, collaborating closely with existing suppliers, and gradually introducing contractual clauses that emphasize sustainability. Attendees will gain a realistic understanding of the challenges involved and will be introduced to strategies that can help their organizations begin the process of reducing their supply chain's carbon footprint. This discussion aims to provide a balanced view, emphasizing that while these steps are crucial, they require time, commitment, and a willingness to engage in long-term efforts. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.com/denog16/talk/7VPLSK/