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UID:691@lincs.fr
DTSTART;TZID=Europe/Paris:20220323T150000
DTEND;TZID=Europe/Paris:20220323T160000
DTSTAMP:20220322T211954Z
URL:https://www.lincs.fr/events/geolink-a-multimodal-approach-internet-sca
 le-geolocation-system-for-improved-coverage-and-accuracy/
SUMMARY:GeoLink: a Multimodal approach Internet Scale Geolocation System
 for Improved Coverage and Accuracy
DESCRIPTION:Despite being critical infrastructure\, it remains challenging
 to accurately position the physical location of Internet routers. In
 contrast to end-host geolocation where provider databases\, registry
 information\, and crowd-sourcing techniques can be successfully leveraged\,
 router geolocation is known to be relatively inaccurate. While concerted
 efforts by the research community have produced recent systems capable of
 significantly better accuracy\, their coverage is generally low\; a
 state-of-the-art systems is capable of geolocating only 7.6% of the router
 IP addresses in Internet scale topology datasets. We develop\, evaluate\,
 and make public the GeoLink system for geolocating router IP addresses at
 Internet scale. Our key insights are three-fold: i) utilize unique
 capabilities and properties of routers\, i.e.\, timestamps\, aliases\, and
 DNS names\; ii) use multiple active measurement techniques to derive
 per-link latencies and identify co-location\; and iii) combine existing
 techniques to improve coverage and refine candidate inferences. To
 bootstrap GeoLink\, we extract geolocation candidates from multiple data
 sources including existing geolocation databases\, DNS names\, and
 PeeringDB. We finally use our new measurement techniques to obtain sound
 link latencies\, extend coverage for bidirectional links\, and ensure
 aliases are location geo-consistent. On a large validation set\, GeoLink
 provides 5 times coverage improvement over existing systems\, while
 simultaneously lowering error.\n&nbsp\;\nShort
 bio:&nbsp\;\nKevin&nbsp\;Vermeulen is a researcher at CNRS. He has obtained
 his doctorate at Sorbonne Université ok internet cartography in 2020 and
 did a postdoc at Columbia University on building systems to analyze and
 improve internet paths before joining the CNRS. He is interested in
 building measurement systems for a better understanding of the internet.
CATEGORIES:Seminars
LOCATION:LINCS + Zoom\, 23 avenue d'Italie\, Paris\, 75013\, France
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=23 avenue d'Italie\,
 Paris\, 75013\, France;X-APPLE-RADIUS=100;X-TITLE=LINCS + Zoom:geo:0,0
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DTSTART:20211031T020000
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