Ulrich Wisser, ICANN
Ulrich WISSER has joined ICANN Org as Regional Technical Engagement Manager for Europe. His main role is to support ICANN org’s technical engagement efforts in the region (trainings, promote DNS standards and best practices, promote research, …). He reports to Adiel Akplogan, VP Technical Engagement at the Office of the Chief Technology Officer.
Ulrich’s professional career prior to joining ICANN included a 15 year tenure at the Foundation for Internet Infrastructre, the Swedish ccTLD (.SE) registry. He has served as Co-chair of the Centr Tech working group and on the DNS-OARC program committee.
He is a 4th degree black belt and licensed judo instructor.
About the talk:
The Key to (Not) Breaking the Internet: October’s Root KSK Rollover and Your Resolver
In October 2026, the DNSSEC root zone Key Signing Key will finally roll. For most end users this change should be invisible, but for anyone running validating recursive resolvers, misconfigured or stale trust anchors can turn October into the month when “the Internet breaks”. This talk will save you a long weekend at the office.
Gianluca Sironi, Naquadria/PCIX
Gianluca Sironi is co-founder of Naquadria and PCIX, serving as CFO and managing special projects and enterprise architectures; he has worked in IT services in the banking sector for 25 years as network and systems engineer; he collaborates with the Milan Order of Engineers and Politecnico di Milano and he is a member of the ITNOG association.
About the talk:
A view of Slovenian Internet traffic as seen at SIX
Abstract yet to be received.
Sander Steffann, ProVision
Sander Steffann has been involved in the Internet since 1995, when he helped a friend start a small ISP. He holds a Master’s degree from the University of Twente and has been an active member of the RIPE community since 2004, co-chairing the RIPE Address Policy Working Group from 2007 to 2018. Since 2010 he has worked as an independent consultant advising enterprises and service providers on network architecture and IPv6 deployment, and he was a founding board member of the Netherlands IPv6 Foundation, NLNOG and the Global NOG Alliance. Since 2025 he is part of the ProVision team, which provides DDI software, anycast DNS and professional services for network management.
Jan Žorž, ProVision
Jan Žorž is a network engineer and IPv6 architect with more than 30 years of experience in ISP network design and Internet governance, currently Head of ProVision Labs. He founded the Go6 Institute, where he coordinated Slovenia’s participation in the World IPv6 Launch, and spent nearly a decade on the Internet Society’s Deploy360 operational engagement programme. He is a primary co-author of RIPE-554, the BCOP on IPv6 requirements for ICT equipment, a co-founder and board member of the Global NOG Alliance, and the founder of SiNOG.
About the talk:
You can’t make everybody equally happy.
You deploy anycast, announce your prefixes from 13 regions, and everything works. Users are happy. DNS resolves. Life is good. But is traffic actually going where you think it is? Is that 250ms RTT from Tokyo normal, or is someone in Asia routing through Ljubljana? And why are some packets just… disappearing?
This talk walks through our journey of building a comprehensive anycast measurement system — from “it probably works” to “we can prove it, and here’s what’s broken.” We’ll cover ICMP and TCP probing at scale, PMTU black hole detection, BGP routing verification, geographic misrouting analysis, and the joy of discovering that your scanning tool has a kernel bug. No anycast nodes were harmed in the making of this presentation. A few kernel bugs were, though.
Marko Zagožen, Flint
Marko Zagožen is an IT architect at Flint and a network automation expert. With a background in software engineering and as a Cisco Certified Systems Instructor (CCSI), he focuses on model-driven network and service orchestration with YANG and Cisco NSO. He was one of two external speakers invited to the 2021 Cisco Developer Days, and has collaborated with Deutsche Telekom on open-source network automation tooling.
About the talk:
StratoWeave: closed-loop automation for service provider networks (working title)
StratoWeave is a platform for robust network orchestration systems based on model-driven declarative transforms. Telemetry and operational state collected from the network are made available for closed-loop reactions. YANG is used throughout the stack to build the layered abstractions, which are also used at development time for static type checking. The platform is open source and part of Linux Foundation Networking, contributed by Deutsche Telekom.
The talk introduces closed-loop automation using declarative transformations in the context of managing a service provider network (MPLS Layer 3 VPN), with a complete demo (github.com/stratoweave/sorespo) showing the implementation in practice.
Luka Filipič, NIL
Luka Filipič started his career as a network engineer and Cisco course instructor, and joined NIL in 2013. He first worked in the customer support department for cloud office services, then developed through various roles from Linux system engineer and internal IT specialist to network engineer.
Today, as a data communications specialist, he works with clients from the banking, energy and manufacturing sectors, where he helps with the planning, configuration and management of wide area, local area and data center networks. His expertise in switching and routing technologies is confirmed by the CCIE Enterprise Infrastructure and CCNP Service Provider certificates.
Recently, Luka has been focusing mainly on Cisco Catalyst SD-WAN and Cisco ThousandEyes solutions, which enable companies to increase security, transparency and optimization of their WAN infrastructure.
In his free time, he is passionate about mountaineering and exploring mountain trails and verticals.
About the talk:
Case study: Building a Modern OT Network – Platform for OT (POT)
The POT project is one of the largest OT infrastructure modernization initiatives in Slovenia, supporting DARS, the national motorway operator. The project’s primary objective is to establish a resilient, secure, and centralized operational technology platform that enables reliable traffic management while addressing key business requirements, including IT/OT separation, cybersecurity, high availability, operational standardization, and long-term scalability.
This session will present the architecture, design principles, and implementation of a highly available transport network, modern data center infrastructure, and a secure OT environment. Special attention will be given to how the network architecture enforces IT/OT segmentation, improves operational resilience, and supports the migration of mission-critical traffic control systems without service interruption.
Presenters: Aleksander Kocelj (Head of IT at DARS), Luka Filipič (Internetworking specialist at NIL), Daniel Gutiérrez Rodríguez (SW Developer at NIL)
Ralph Smit, RIPE NCC
Ralph Smit is a Senior Internet Resource Analyst at the RIPE NCC, specialising in Internet number resources (IPv6, IPv4 and ASNs), Internet routing (BGP) and routing security (RPKI). He joined the RIPE NCC in 2021 after more than fifteen years as a network engineer at various Internet service providers, where he designed and maintained networks for hosting, access, voice and mobile data services.
About the talk:
ASPA la vista, route leaks! (working title)
Abstract yet to be received.