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Publikationen von Professorinnen und Professoren der HAW Hamburg

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Alle : 2016
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Alle : W. Biersack, Waas, Wabitsch, Waehlisch, ... , Wöste 
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Johann Schlamp, Matthias Wählisch, Thomas C. Schmidt, Georg Carle und Ernst W. Biersack
CAIR: Using Formal Languages to Study Routing, Leaking, and Interception in BGP
Technical Report
Dokument Nummer: arXiv:1605.00618
Open Archive: arXiv.org,
2016

Marker: TI-I

Zusammenfassung: The Internet routing protocol BGP expresses topological reachability and policy-based decisions simultaneously in path vectors. A complete view on the Internet backbone routing is given by the collection of all valid routes, which is infeasible to obtain due to information hiding of BGP, the lack of omnipresent collection points, and data complexity. Commonly, graph-based data models are used to represent the Internet topology from a given set of BGP routing tables but fall short of explaining policy contexts. As a consequence, routing anomalies such as route leaks and interception attacks cannot be explained with graphs. In this paper, we use formal languages to represent the global routing system in a rigorous model. Our CAIR framework translates BGP announcements into a finite route language that allows for the incremental construction of minimal route automata. CAIR preserves route diversity, is highly efficient, and well-suited to monitor BGP path changes in real-time. We formally derive implementable search patterns for route leaks and interception attacks. In contrast to the state-of-the-art, we can detect these incidents. In practical experiments, we analyze public BGP data over the last seven years.

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