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ThinkMind // INTERNET 2012, The Fourth International Conference on Evolving Internet // View article internet_2012_2_30_30032


Prototyping TCP Options to Reveal Host Identity in IP Address Sharing Environments

Authors:
Elie Abdo
Mohamed Boucadair
Jaqueline Queiroz

Keywords: address sharing, CGN, TCP Option, HOST_ID

Abstract:
Internet Service Providers must maintain the delivery of IPv4 services during the forthcoming IPv6 transition period. For this purpose, Service Providers are likely to deploy address sharing mechanisms. However, address sharing techniques raise specific issues such as the difficulty to distinguish unambiguously different hosts sharing the same public IPv4 address. To mitigate some of the encountered issues, HOST_ID TCP Option has been proposed as a means to reveal the identity of a host when address sharing is deployed by Internet service providers. If no HOST_ID is revealed to remote servers, all subscribers sharing the same IP address will be impacted by a misbehaving user. This paper documents implementation and testing results of HOST_ID TCP Option. Linux kernel and Carrier Grade NAT have been ported to support the ability to inject HOST_ID Options while iptables module has been modified to interpret the information conveyed in HOST_ID and also to enforce dedicated policies.

Pages: 44 to 50

Copyright: Copyright (c) IARIA, 2012

Publication date: June 24, 2012

Published in: conference

ISSN: 2308-443X

ISBN: 978-1-61208-204-2

Location: Venice, Italy

Dates: from June 24, 2012 to June 29, 2012

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