09:00

Registration

10:00

Intro to non-WiFi wireless protocols

Tomáš Kirnak | NetCore j.s.a. (Unimus)

WiFi is far from the only wireless protocol that sees mass adoption today. In this presentation, we look at other protocols that exist across the wireless spectrum. HaLow, LoRa, Z-Wave, Zigbee and Thread will be discussed, and you will learn about the use-cases and differences across these protocols.

11:00

Optical Foundations for IP Engineers: From Fiber Basics to CWDM/DWDM and Link Budgeting

Andreas Glatz | Flexoptix

This talk provides a concise introduction to essential optical fundamentals for IP networking professionals, covering topics such as single-mode and multi-mode fiber and their structural and operational differences, common connector types and their usage, and a detailed look at optical losses.

11:40

DNS PATROL (Safe DNS Project for Vysočina Region)

Miroslav Hampl | CZ.NIC

The Safe DNS project for Vysočina Region represents a modern approach to protection against DNS threats. The aim is to increase security and provide an effective tool for managing and monitoring DNS traffic.

12:00

Lunch

13:00

Welcome

13:10

DNS Under Control: How to Build a Modern Secure Resolver for an ISP

Tomáš Hála, Lukáš Vacek | CZ.NIC

We will present an approach to designing and operating a secure DNS resolver for an ISP. We will discuss the principles of a robust high-availability architecture, DNSSEC validation, and the use of RPZ zones to effectively block malicious domains. We will go through practical procedures and configurations from real-life operations.

Challenges for the Regulator in 2026

Marek Ebert | ČTÚ

The presentation focuses on the challenges of regulating the digital space in the Czech Republic in 2026. It introduces the audience to the regulator's current responsibilities, which now extend beyond the telecommunications sector to include information society services. The presentation will also briefly review 2025, including the oversight of election fairness in the digital space.

13:30

DNS4EU from the RIPE Atlas perspective

Alex Semenyaka | RIPE NCC

In 2025, Europe launched a regional competitor to projects such as Google DNS and Cloudflare DNS: DNS4EU. For two months, I conducted DNS measurements from European, almost-European, and completely-non-European countries to the servers of this project, and in this talk I would like to present some preliminary results.

Incident Reporting Under the New Cybersecurity Act

Jiří Valtr | NÚKIB

The new Cybersecurity Act fundamentally changes the way cyber incidents are reported and evaluated in the Czech Republic. The presentation will provide a clear overview of the main differences from the existing legislation, introduce new obligations resulting from the implementation of the NIS2 Directive and show how the whole process of incident reporting and handling of incidents by CERT works in practice.

13:50

Evolution of DNS – The New DELEGation

Petr Špaček | Internet Systems Consortium

A brief introduction to the newly proposed delegation mechanism in DNS, known as DELEG. We will explain how it differs from the current delegation process and demonstrate what the future capabilities of DNS could be.

The New National Cyber Security Strategy

Petr Procházka | NÚKIB

This presentation will introduce the National Cyber Security Strategy, approved in September 2025, which sets out the vision and goals of the Czech Republic in this area for the coming years.

14:10

Post-quantum Cryptography for DNSSEC

Ondřej Surý | ISC & Ostravská Univerzita

The deployment of quantum computing-resistant cryptography for DNSSEC is fraught with pitfalls due to the limitations of the DNS protocol. This talk will present current and future possibilities of using post-quantum cryptography for DNS security.

Challenges Faced by NÚKIB Portal

Petra Kajánková | NÚKIB

The launch of the National Cyber Security Agency (NÚKIB) portal has brought a new way for entities to comply with their obligations under the Cybersecurity Act and the NIS2 Directive. The aim of this presentation is to assess how the portal has performed in the first months of operation – what has been achieved, what challenges the team has encountered and what lessons can be taken forward to the next phase of development. The talk will offer an "inside" view of the preparation and launch of the system, including technical, procedural and usability aspects.

14:30

Coffeebreak

15:00

The Future of Whois - RDAP

Ulrich Wisser | ICANN

Although RDAP is not a new protocol, most people still use whois. Starting in January this year the first top level domains have switched off their whois servers. In this talk I try to give an overview of RDAP, its deployment and usage.

Attention, AI Regulation!

Marek Vrbík | ČTÚ

The European Artificial Intelligence Act ushers in a new era of digital technology regulation. The Czech Telecommunications Office will become one of the key supervisory authorities overseeing compliance with AI rules. The talk will outline our preparations for this role and what it will mean for those subject to the standards.

15:20

How to draw network maps with Netbox

Ladislav Loub | CESNET

At last year’s CSNOG, we showed our way to the open-source network management tool Netbox. This year, we’ll follow up and present all the things you can save in Netbox and then display, for example, in a map format.

Alice in Darknetland, a Place That Would Terrify Even the Hatter...

David Malaník | Univerzita Tomáše Bati ve Zlíně

Let’s take a look at the ways attackers can get around the rules for blocking “interesting” data sources. How to conduct Darknet reconnaissance safely, and what we’ll have to learn to reckon with when it comes to anonymizing services on the network.

Presentation: 60 minutes

15:40

Defending Against IP Spoofing

Zbyněk Pospíchal | Quantcom

Tools to protect network infrastructure against IP spoofing have been stagnant for many years. However, RFC 8704 introduces EFP-uRPF and other options that can change the current situation. And beyond that, there are things that can be done today.

16:00

The Evolution of Network Defense at CESNET

Tomáš Košňar | CESNET

CESNET has long been developing a set of tools for monitoring, managing, and regulating traffic, detecting attacks and mitigating them. These tools can be used independently of each other, but they can also be assembled into modular units for automatic defense of the network and its users, even in combination with self-service traffic management by the users themselves. The aim of the talk is to show the development and variants of the architecture of this solution, as well as lessons learned from some stages of development as inspiration for others.

16:20

Matrix: An Open Standard for Secure Communication

Marian Rychtecký | NIX.CZ

Matrix has become one of the fastest growing open communication protocols in the field of secure, decentralized, and scalable team communication. The presentation will show why Matrix is attracting the attention of companies, government agencies, and security communities, how end-to-end encryption (Olm/Megolm), federation, and identity work, and how it can be integrated into existing infrastructure.

16:50

End of Day 1

19:00

Transfer to the social event

19:00

Social Event