Johannes Zirngibl

Johannes Zirngibl

PhD candidate and research associate at the Technical University of Munich

Welcome

As a research associate and PhD candidate at the Chair of Network Architecures and Services at the Technical University of Munich, I focus on large scale analysis and measurements targeting the Internet. My core areas are the analysis of network deployments and their peculiarities. My work relies on multiple protocols spanning networking layers, such as IPv6, DNS, TLS, QUIC.

The goal is to reach a better understanding of the Internet and the impact of often disregarded influences such as Off-Net deployments.

I am co-leading the Global Internet Observatory (GINO), an interest group at our chair focusing on Internet measurements. Over the years, we acquired vast knowledge in the area of large scale network measurements. This helps us to understand the current network state and its development. We seek to be harmless and conduct all measurements in an ethical manner.

Recent News

All news

  • IPv6 Hitlist Extension

    July 17, 2023

    Two weeks Lion Steger presented our latest insights and extensions to the IPv6 Hitlist Service at TMA 2023 and received the best paper award. The work categorized the Hitlist based on network types and evaluated target generation algorithms under different conditions. The paper is avaialable for more information. We further added a new historic and ongoing categorization as part of the Hitlist service for everybody to use. New responsive addresses will also be visible shortly.

  • QUIC Interest Group and IFIP 2023

    May 05, 2023

    Together with a colleague, I founded a QUIC Interest Group that brings together researchers and students with an interest in QUIC. Interests cover performance measurements, the analysis of different libraries but also Internet-wide measurements to evaluate QUIC deployments.

    An outcome of this group, a performance evaluation of different libraries on a 10G link has been accepted to be published at IFIP Networking 2023. You can find a preprint of this work here

  • PAM 2023

    February 01, 2023

    One of our papers has been accepted to the PAM 2023.

  • APNIC blog: An investigation into Apple’s new Relay network

    January 25, 2023

    Patrick Sattler wrote a nice post on the APNIC blog about our recent investigation into Apple’s new Relay network iCloud Private Relay. Checkout our IMC 2022 publication for more information.

  • IPv6 Hitlist Service

    July 20, 2022

    Alongside our IMC 2022 publication we updated the IPv6 Hitlist Service. We deployed the following updates:
    • We removed all responses to the UDP/53 scan injected by the Great Firewall of China (historically and for future scans)
    • We added new sources increasing the number of responsive addresses by roughly 5 Million to 7.2 Million. Most addresses are from different target generation algorithms but also new passive sources.
    We furthermore suggest that research relying on the IPv6 Hitlist evaluate whether addresses from fully responsive prefixes (aliased prefixes) should be included. For more information, we refer to our paper.

Selected Publications

Full list of publications