Anycast de nos jours

Abstract : The work of this thesis originates from the investigative curiosity of discovering IP anycast. Once relegated to root and top-level Domain Name System (DNS) servers, anycast is now commonly used by Content Delivery Networks (CDN) and other key Internet players. In this thesis, we aim to raise awareness about IP anycast by building a comprehensive picture of it. First, we focus on the identification of a protocol-agnostic and lightweight technique used for the discovery and geolocation of anycast replicas. Other measurement techniques exist. However, they exploit specifics of the DNS protocol, which limits their applicability to this particular service. We also provide the community with open-source software and datasets. This methodology enables the next step of our research: unveiling all the companies that currently use anycast. We carry on multiple IPv4 anycast censuses from a distributed platform. These censuses find that many major Internet companies utilize anycast. In addition to identifying the companies, updated information on anycast IPs and their geolocation can serve for many other purposes. Hence, the decision was made to put a system in place, which is capable of performing monthly IPv4 censuses and analyzing the results of one-year measurements. Finally to complete the picture, we investigate the users and services that anycast CDNs are serving at large on the Internet. We perform a passive characterization focusing on the services they offer, their penetration, etc. Our findings reveal that more than 50\% of web users access content served by anycast CDNs. A broad range of Transmission Control Protocol (TCP) services are offered over anycast.
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Danilo Cicalese. Anycast de nos jours. Réseaux et télécommunications [cs.NI]. Télécom ParisTech, 2018. Français. ⟨NNT : 2018ENST0025⟩. ⟨tel-02477974⟩

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