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25 April 2024 |
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A Multi-perspective Analysis of Carrier-Grade NAT Deployment | | Philipp Richter
; Florian Wohlfart
; Narseo Vallina-Rodriguez
; Mark Allman
; Randy Bush
; Anja Feldmann
; Christian Kreibich
; Nicholas Weaver
; Vern Paxson
; | | Date: |
18 May 2016 | | Abstract: | As ISPs face IPv4 address scarcity they increasingly turn to network address
translation (NAT) to accommodate the address needs of their customers.
Recently, ISPs have moved beyond employing NATs only directly at individual
customers and instead begun deploying Carrier-Grade NATs (CGNs) to apply
address translation to many independent and disparate endpoints spanning
physical locations, a phenomenon that so far has received little in the way of
empirical assessment. In this work we present a broad and systematic study of
the deployment and behavior of these middleboxes. We develop a methodology to
detect the existence of hosts behind CGNs by extracting non-routable IP
addresses from peer lists we obtain by crawling the BitTorrent DHT. We
complement this approach with improvements to our Netalyzr troubleshooting
service, enabling us to determine a range of indicators of CGN presence as well
as detailed insights into key properties of CGNs. Combining the two data
sources we illustrate the scope of CGN deployment on today’s Internet, and
report on characteristics of commonly deployed CGNs and their effect on end
users. | | Source: | arXiv, 1605.5606 | | Services: | Forum | Review | PDF | Favorites | |
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