Paul JUNG
Paul Jung (paul.jung@circl.lu) is a long-time security professional with over two decades of experience in the cybersecurity field in Luxembourg. He has built extensive consulting expertise across multiple industries, covering activities from offensive security assessments to incident response and digital forensics. Prior to joining the Computer Incident Response Center Luxembourg (CIRCL), he served as Senior Security Architect in the Managed Network Security department of the European Commission, where he led the technical direction of major security projects. He later joined Excellium Services (acquired by Thales Group in 2022), where he founded and led TCS-CERT, a multi-country CSIRT dedicated to intrusion response. Paul regularly speaks at international conferences such as FIRST, Virus Bulletin, Botconf, and Hack.lu, and has published articles on DDoS, botnets, and incident response. He is a native French speaker and fluent in English.
Session
A network telescope, also called a black‑hole or network sinkhole, is a passive monitoring system that observes traffic sent to large blocks of unused IP address space. Because these IP ranges are never assigned to active hosts and do not generate legitimate responses, any traffic received is by definition unsolicited. This makes network telescopes powerful tools for studying global Internet behavior. They capture background noise, scanning activity, botnet noise, malicious probes, and even misconfigurations that would otherwise remain invisible. At CIRCL we operate a /18 Network Telescope since a long time, and in the context of this presentation, we will explain the potential of such dead network and our use case.