Chaos Computer Club - archive feed

You've maybee seen the raking robot that got a CEH (Certified Estetisch Harker) certificate, the Telex linked to Twitter/Telegram or the ASCII foto booth. They are all made by me. If this talk gets accepted I will do a deep dive on these three contraptions and what I learned building them. Beside Schuberg Philis, DIVD, attending the farm and keeping my bees I als build machines. It is an interesting process and I want to share it with you. Machiens I will be talking about: * The (worlds?) 1st 3d color printer from TNO * The raking robot * AI/Twitter/Telegram/Slack connected Telex * ASCII photo booth Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/XSSZ9J/

How to make an Android App for Android Auto, a demo of the MapLibre sample app, and stories about Flitsmeister. FrankkieNL has worked on the Android Auto (and Automotive) version of the Flitsmeister app. This navigation app uses MapLibre to render a map on the Car screen. During this talk, we will discuss how this works and how you can create your own Android Auto-based app. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/ZQ3RYV/

In today's rapidly evolving digital landscape, the increasing frequency and the scale of security incidents pose significant challenges for incident response teams. The traditional approach, rooted in digital forensics, is no longer sufficient nor is it efficient enough. It's time for a shift towards an automated incident response strategy that combines the investigative prowess of a digital detective with a DevOps mindset. In this talk, we will present how the incident response process of acquiring data, processing data, and analyzing information can be automated. Based on how we have built our incident response lab using open-source software packages developed by Microsoft (AVML), Google (Timesketch, WinPmem), Rapid7 (Velociraptor), Fox-IT (Dissect), Elastic, KROLL (KAPE) and HashiCorp (Terraform, Vault). We will guide you from using tools manually to using these tools automatically and magically. Well not really magically, but we will emphasise the application of a DevOps mindset to the process that most incident responders execute on a daily basis including ourselves, combined with examples that can be put into practice. In today's rapidly evolving digital landscape, the increasing frequency and the scale of security incidents pose significant challenges for incident response teams. The traditional approach, rooted in the perspective of digital forensics, is no longer sufficient. It's time for a shift towards an automated incident response strategy that combines the investigative prowess of a digital detective with a DevOps mindset. In this talk, we will present how the incident response process of acquiring data, processing data, and analyzing information can be automated. We will guide you from using tools manually to using these tools automatically and magically . Well not really magically, but we will emphasize the application of a DevOps mindset to the process that most incident responders execute on a daily basis including ourselves, combined with examples that can be put into practice. An example of this is that the human knowledge of an incident responder should feed into the repeatable methods and should not stay in the mind of the best incident responder in the team. By using feedback loops, the knowledge that is gained during a case can be transformed into methods that can be re-used during new cases. In setting up our incident response service, we had the benefit that we could start from scratch, without any legacy, in a cloud native world and with a significant number of lessons learned in the past, we have built an innovative incident response lab using open-source software packages developed by Microsoft, Google, Rapid7, Fox-IT, Elastic, KROLL and HashiCorp. By using Infrastructure as Code (IaC) we can automatically provision the lab on the Google Cloud Platform, acquire and process data and perform analysis using various methods within two hours, without the intervention of an incident responder. We still need humans, but we should focus on doing the creative and research part of an incident response case. Besides that, there is no silver bullet, humans cannot fully trust the automated analysis. This is where the investigative prowess of a digital detective comes into play, ensuring the validation of results and the reproducibility of findings throughout the entire incident response process, from data acquisition to analysis of information. References https://hackernoon.com/the-devops-mindset-a-step-by-step-plan-to-implement-devops-s03p35rr https://nluug.nl/bestanden/presentaties/2022-11-29-francisco-dominguez-en-zawadi-done-automating-incident-response-should-be-the-default.pdf https://zawadidone.nl/automating-dfir-using-cloud-services/ https://www.huntandhackett.com/blog/scalable-forensics-timeline-analysis-using-dissect-and-timesketch Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/ARDG3T/

Lockpicking is a sport where you open locks without force and mostly without keys. While doing this activity nothing much can be seen of the actual process. In stead you need to rely on sound and feel (tactile feedback from the lock). Therefor a lot of people (including us) think a visual impaired person could be rather good at this (as they are more trained to use the "other" senses) The firsts steps into locksport however are VERY visually heavy (video's, pictures, diagrams) which makes it rather hard for a visual impaired person to get started. We believe we fixed that now. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/WBSRED/

A year later, we are back at the wonderful company Acme where nice people make beautiful things. This time we will follow up on that and tell you how the company can improve their own maturity and security levels as explained in the standard. A year later, we are back at the wonderful company Acme where nice people make beautiful things. How did they fare, and what steps can they take now to protect their beautiful company from unwanted incidents. Last time we explained the challenges the company faces and how they could start their OT cybersecurity journey. This time we will follow up on that and tell you how the company can improve their own maturity and security levels as explained in the standard. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/J33HDT/

A short introduction to cryptography, its past, present and future for the not yet fully initiated. Many talks mentioned cryptography somewhere along the presentation and everybody just nods. But how many people actually know the insights of cryptography? Why some things work and some things don't? During this talk I will explain the difference between encoding and encryption, the most common uses of cryptography, the difference between synchronous and asynchronous encryption, hashes. I will include some history and some future developments like quantum and why wel call cryptocoin cryptocoin. In a slow pace, scratching the surface for uninitiated, but the scratches will go deep enough for more initiated to get some more background. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/KPBZKG/

Motivationsvortrag über verschiedene Microcontroller und Abstraktionsfähigkeit durch höhere Prorgammiersprachen Assembler->C->Rust, Arduino, STM32, ESP32 https://www.ulm.ccc.de/ccc/chaosseminar/2025_02_embedded-software-entwicklung/ https://wieerwill.dev/ about this event: https://www.ulm.ccc.de/ccc/chaosseminar/2025_02_embedded-software-entwicklung/

🇬🇧 English Version Open Politics – Collaborative Tools for Open Political Data Politics is complex, and making sense of it requires access to good information. The Open Politics Project is working on and operationalising open-source tools that help analyse political structures, decisions, and developments—so that journalists, researchers, activists, and engaged citizens can better understand and interpret them. Our goal is to make political data more accessible and useful. We bring together existing methods from data analysis, political science, and AI, while also experimenting with new approaches—always in the open, documented, and improved through collaboration. From user-friendly visualisations to structured databases, we explore ways to work with political data in a way that’s practical and meaningful. We call it: Open Source Political Intelligence At Datengarten on February 5, 2025, we’ll share our latest progress, discuss challenges, and give a behind-the-scenes look at our work. 📍Chaos Computer Club Berlin (CCCB), Marienstraße 11, 10117 Berlin Let’s talk about how we can make political information more open and useful for everyone. 🔗 Open Politics Project: https://open-politics.org/about, https://github.com/open-politics/open-politics, https://github.com/open-politics/opol 🇧🇪 German Version Open Politics – Offene Werkzeuge für politische Daten Politik ist oft schwer durchschaubar – aber mit den richtigen Werkzeugen lassen sich Strukturen, Entscheidungen und Entwicklungen besser verstehen. Das Open Politics Project entwickelt und operationalisiert Open-Source-Methoden zur Analyse politischer Daten, um Journalist:innen, Forschenden, Aktivist:innen und interessierten Bürger:innen den Zugang zu politischen Informationen zu erleichtern. Unser Ziel ist es, politische Daten verständlich und nutzbar zu machen. Wir verbinden bestehende Ansätze aus Datenanalyse, Politikwissenschaft und KI, probieren neue Methoden aus und dokumentieren alles offen, um es gemeinsam weiterzuentwickeln. Von interaktiven Visualisierungen bis zu strukturierten Datensammlungen – wir experimentieren mit Wegen, politische Informationen alltagstauglicher zu gestalten. We call it: Open Source Political Intelligence Beim Datengarten am 05. Februar 2025 sprechen wir über unseren aktuellen Stand, diskutieren Herausforderungen und geben einen Einblick in unsere Arbeit. 📍Chaos Computer Club Berlin (CCCB), Marienstraße 11, 10117 Berlin Lasst uns gemeinsam überlegen, wie politische Informationen offener und zugänglicher werden können. 🔗 Open Politics Project: https://open-politics.org/about, https://github.com/open-politics/open-politics, https://github.com/open-politics/opol Licensed to the public under http://creativecommons.org/licenses/by-sa/3.0/ about this event: https://c3voc.de

Your organisation has been using Puppet to manage its infrastructure, but it's grown organically over time with best practices and the long-term implications of decisions never really being thought about. A new Puppet administrator has just been handed responsibility for the Puppet infrastructure, we need to help them out. This is a common scenario, the Puppet admin has left an organisation and a new Puppet admin has been assigned but doesn't have any real experience of Puppet, just like their predecessor. We need to teach them what Puppet is, help them understand what they've taken on and use Puppet best practices such as roles and profiles, and Hiera to organize their configuration management into a clear and robust structure that will give them confidence to make the required changes as and when they are needed as the infrastructure grows. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.cfgmgmtcamp.org/ghent2025/talk/NPG9HP/

Since the day Kargo was released, I have been exploring the idea of using it not only to deliver and promote applications but also to deliver infrastructure through its progressive delivery capabilities. Using Kubernetes-based tools like Crossplane or Pulumi, we can define infrastructure as code and deliver it progressively to our management clusters and then promote this infrastructure through different stages without the need for extra CD script magic. Let me show you how Kargo helps platform engineering streamline and automate the progressive rollout of infrastructure changes to all stages. This talk will cover the basics of Kargo and how to use it with Infrastructure as Code tools. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.cfgmgmtcamp.org/ghent2025/talk/DGYEV7/

We use Puppet for about 1200 Linux machines. This talk will recount our journey in upgrading from Puppet 7 to Puppet 8. I will talk about the incompatible changes to be aware of, how we handled them, and general strategy for handling Puppet major upgrades. The talk will cover: - our Puppetserver architecture - changes in Puppet 8 like legacy facts and Ruby 3.2 - how to prepare for any Puppet major upgrade - how to prepare for the Puppet 8 changes specifically - things that the ecosystem could do better Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.cfgmgmtcamp.org/ghent2025/talk/T97UPU/

In this talk, we will introduce Kairos, an open-source project that aims to create immutable Operating Systems designed for Kubernetes. This includes a toolset that simplifies operations at the edge in a cloud-native way. Edge computing has become increasingly popular due to its ability to save costs by processing information closer to the data before sending filtered and computed information to a centralized application or data warehouse hosted in the cloud. Kubernetes is an ideal solution for edge computing because it natively builds components that facilitate the lifecycle management of modern edge applications. However, as we scale the number of edge locations, we face operational challenges, such as interacting with cluster configurations at scale without creating unique configurations for each location, ensuring security for remote clusters and applications, upgrading Kubernetes clusters without specific domain knowledge, and minimizing disruptions during maintenance windows for smaller form factor hardware. Kairos acts as an engine delivering immutable Kubernetes-enabled Linux OS from OCI conformant container images. It provides unique capabilities such as VPN peer-to-peer mesh, a distributed ledger to automate Kubernetes cluster bootstrapping and coordination, and zero-touch provisioning with a QR code scan. But more importantly, it uses a declarative model backed by Kubernetes CRDs. It manages distributed Kubernetes operations at the edge from a centralized Kubernetes cluster. In this presentation, we will explain the foundations and concepts of Kairos and demonstrate its capabilities. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.cfgmgmtcamp.org/ghent2025/talk/3BSKZB/

cloud costs can feel like a nightmare, creeping up on your Kubernetes infrastructure. But with the right tools, you can be the hero your budget deserves! In this talk, we’ll dive into OpenCost, an open-source solution that can help you track and optimize your cloud spending in real time.You’ll discover how OpenCost works, why it matters, and how you can use it to become the cost-saving champion of your cloud environment. Get ready to conquer Kubernetes costs and take back control of your cloud! Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.cfgmgmtcamp.org/ghent2025/talk/PVN3XX/

This talk will walk through and provide examples and war stories on how kubernetes can be used not only in large scale environments but also in small and small-ish scale environments. Kubernetes is often considered as the tool to tackle large scale traffic, which is supposed to be used by a big team of engineers. This talk presents an opposite approach which shows how Kubernetes can be used in a very small team with limited resources. It will explore the benefits of running k8s in a small scale and also what pitfalls come with it. It will walk through the steps of provisioning self hosted Kubernetes cluster - kOps - challenges of keeping clusters upgraded without downtime. It will discuss issues encountered in daily operations, applications taking too long to start up anyone, and then how it was tuned with tools like Goldilocks. It will delve into CI/CD on Kubernetes (using Jenkins and ArgoCD). Keeping an eye on operational costs is essential in a small environment and this talk will discuss how kOps can utlize spot instances everywhere and benefits/challenges with spot instances. The idea of downscaling on schedule with py-kube-downscaler project, mutating pods with kyverno will be discussed. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.cfgmgmtcamp.org/ghent2025/talk/A3QEP7/

Kubernetes is still quite a popular choice with wide community adoption to run containerised workloads in the Cloud, but it doesn’t come with batteries included. And some of that is intentional to allow freedom to make different choices or extend its functionality as needed. For example scaling compute nodes is one of the things which is not built-in. Making sure you’re doing it in most efficient and cost-efficient way is paramount. But it’s not just efficienty than separates Karpenter (an open-source node lifecycle management) from other options, but also how it can help you stay on top with compliance, patching and drift. The project has come a long way in the last couple of year and it was also adopted by CNCF/SIG Autoscaling making it alternative approach compared to de-facto Cluster Autoscaler project. I this talk I’ll show how to set it up, different use cases and demonstrate hands-on what to expect in the real world scenario. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.cfgmgmtcamp.org/ghent2025/talk/P7CTWQ/

Puppet is a mature tool, the company behind it has changed over the years and most of the people who developed it, are no more working there. For somebody Puppet is old, solving problems that are no more current. Yet, Puppet is still around , and as long as there'll be systems to manage over time, there'll be the need of such a tool. The question is if the tool of choice is going to be Puppet or not. What's its present and future? We will analyse the current Puppet situation, market demand and perception, and spend our two cents on what could be done to improve perception, usage and adoption. We will also try to raise the topic with the people in the audience, when the presentation will turn into a discussion, possibly stirring ideas and suggestions. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.cfgmgmtcamp.org/ghent2025/talk/VQUFXW/

Overview of possibilities to assign classes to nodes The Puppet tutorial assembles configuration aus snippets in manifests/site.pp node default { include apache } . There are more possibilities than advertised by Puppet: * External Node Classifier * Roles und Profiles * Hiera Chainloading as Array or Hash * Puppet Enterprise Console/Foreman Host Groups We will get a quick intro to each of them, an explanation on how to shoot yourself in the knee with these and a field report of ways that have proven to cause less pain. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.cfgmgmtcamp.org/ghent2025/talk/TCKR7P/

What is new in HDM Release 3? Hiera Data Manager (HDM) is a web UI, which provides insight into your Hiera Data. One can easily check, which values are set in which layer and recognize, why a node receives which configuration data. With the newest release we added some new features, which I would like to present. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.cfgmgmtcamp.org/ghent2025/talk/FCSFJP/

Kubernetes is the most popular container orchestration platform out there, and for anyone who wants to do GitOps on Kubernetes, ArgoCD is a leading open source project in this space. This presentation will walk you through the management of multi-architecture applications for Kubernetes with ArgoCD. In this presentation, we will run through the process of managing container applications on hybrid arm64 and x86 Kubernetes clusters using ArgoCD for GitOps, including: * Why add arm64 compute nodes to your Kubernetes clusters? * Tooling to build and manage multi-arch containers * Continuous integration and delivery patterns * Workload placement and orchestration in Kubernetes Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.cfgmgmtcamp.org/ghent2025/talk/L7WJRN/

Managing compliance in infrastructure as code environments is essential but can be daunting. Enter `compliance_engine`, a new open-source Ruby gem designed to streamline the mapping of compliance standards to Puppet code. Building on the foundation of SIMP's `compliance_markup`, this reimagined backend prioritizes performance, flexibility, and maintainability. In this session, we’ll explore the evolution from `compliance_markup` to `compliance_engine`, highlighting the architectural improvements that make it faster and easier to use. We’ll dive into real-world examples, demonstrating how the gem simplifies the enforcement of compliance policies, reduces complexity, and supports emerging standards. Attendees will gain insights into the challenges of implementing compliance as code and learn how `compliance_engine` can transform their approach to regulatory compliance in Puppet environments. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.cfgmgmtcamp.org/ghent2025/talk/NXJTDG/

A real life view into how an enterprise company uses Choria for orchestration and what we had to build around it. This talk gives the basics of Choria along with infrastructure considerations such as running only from Jenkins and code considerations including control repo organization, org specific stdlib and interacting with other teams. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.cfgmgmtcamp.org/ghent2025/talk/W7WAZG/

Managing secrets in Kubernetes can be a complex and overwhelming process, especially with the wide range of available options. This talk, designed for intermediate users, aims to demystify the process by providing a practical roadmap drawn from my own journey. I will explore common challenges and share insights from transitioning through various approaches, from Kubernetes' built-in secrets to external tools like Sealed Secrets, CSI Secrets Store, and External Secrets. Through real-world examples and lessons learned, attendees will leave with actionable strategies to manage secrets more securely and efficiently in their Kubernetes environments, while contributing to stronger community practices and more resilient applications. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.cfgmgmtcamp.org/ghent2025/talk/HS8ELE/

How do you upgrade 3000 individual PE environments? 3000 environments that you don't manage and others own. 3000 environments without SSH access. Come with me on a "funny" journey and learn how we made this possible and how the PE upgrade process differs from Open Source. Lets do a deep dive into PE 2019->2021->2023 Upgrades and our open source tooling that made this possible. You can also watch the slides online at: https://bastelfreak.de/cfgmgmtcamp2025/pe.html#1 Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.cfgmgmtcamp.org/ghent2025/talk/9NUL9E/

Monitoring Kubernetes doesn’t have to be complicated. In this talk, I’ll introduce a new module we’re developing for Icinga, currently in beta, that simplifies Kubernetes monitoring in the same way Icinga has for traditional infrastructure. We’ll explore how this module makes it easier to monitor your clusters’ health and performance, allowing you to identify issues early. Whether you’re new to Kubernetes or managing large-scale clusters, this session will provide a preview of what’s to come and how it can streamline your monitoring processes. Feedback and insights are welcome as we refine the tool. Kubernetes offers powerful orchestration capabilities, but monitoring its dynamic environment can be tricky. In this session, we’ll dive into the development of a new module for Icinga that simplifies Kubernetes monitoring, making it more accessible for users who are familiar with traditional IT infrastructure setups. While the module is still in the beta phase, I’ll walk through its current features, show how it integrates with your existing Icinga setup, and discuss future enhancements. We’ll look at practical examples of monitoring critical aspects like node health, pod status, and resource utilization, all through Icinga’s familiar interface. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.cfgmgmtcamp.org/ghent2025/talk/AH78JZ/

Description: Most of us remember how long it took for Puppet to get Debian 12 packages. The build pipeline was long and complex and used a lot of internal tooling that had to be updated manually. In current news though, the new OpenVox build pipeline has been totally revamped and simplified and adding support for RHEL 10 took about 10 minutes. Most of that was spent waiting for the build to complete. Nick would like to explain how it works and what we still have left to do. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.cfgmgmtcamp.org/ghent2025/talk/7HXT7V/

It is very common now for developers to code and test their applications on VMs, either locally hosted or on the cloud. As individuals have editor preferences (nvim, vscode, etc), so they have hypervisor. Once you create a bolt inventory file listing the server or servers, then bolt can easily configure those servers using custom puppet code. Instead of manually creating the bolt inventory, it is easy to create a dynamic inventory plugin--if it doesn't already exist--to suit your particular use case. This talk illustrates how we setup our own local dynamic inventory plugins to help with our automated development and testing. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.cfgmgmtcamp.org/ghent2025/talk/GYKK3P/

Testing Puppet code can be a hassle, but voxbox is here to save the day! Testing Puppet code can be a hassle, but voxbox is here to save the day! Voxbox is a complete testing environment in a container, with all the good gems from Vox Pupuli. Active maintained and ready to run locally or in your CI. It also has jq and yamllint on board. I will showcase how it is build, how it is used and how it can be integrated into gitlab-ci. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.cfgmgmtcamp.org/ghent2025/talk/WHTKEC/