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An Optimized Port Allocation Mechanism in the Context of A+P for Public IPv4 Address Sharing

Authors:
Xiaohong Deng
Lan Wang
Daqing Gu

Keywords: IPv6 migration; Dual-stack Lite; A+P; Port randomization.

Abstract:
The IANA free pool of IPv4 addresses will be exhausted soon, how to use scarce IPv4 public addresses more efficiently while migrating to IPv6 is a challenge. A+P is recommended as a complementary method to Dual-stack Lite which aims at address public IPv4 address sharing problem in the context of IPv6 migration. Since A+P suffers from inflexible port allocation, this paper introduces an optimized A+P port allocation mechanism which allows customers negotiate IP-addresses of desired sharing ratios on their requirement. Moreover it enables A+P NAT using random source port selection algorithm which significantly improves security by preventing attacker's easy guessing the five-tuple. The test result shows that this mechanism enables great randomness of source ports selection behavior on A+P NAT.

Pages: 73 to 79

Copyright: Copyright (c) IARIA, 2011

Publication date: May 22, 2011

Published in: conference

ISSN: 2308-4006

ISBN: 978-1-61208-133-5

Location: Venice/Mestre, Italy

Dates: from May 22, 2011 to May 27, 2011