KaiKai: A NAT traversal approach by using protocol behavior analysis

Yung Li Chang, Hsiang Kai Liao, Ce Kuen Shieh, Yu Ben Miao

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Typical NAT traversable applications solve the peer-to-peer communication problems by means of STUN-like NAT traversat approach. For example, Skype is a well-known NAT traversable application. The Skype developer claims that peer-to-peer voice over IP (VoIP) service can work across NATs/firewalls. Two Skype clients which reside in different NATs can connect directly with each other. Nonetheless, Skype clients can not traverse through the NAT daemon on FreeBSD system without "Deny Incoming" option being set. The default of this option is disabled and Skype clients must depend on third parties to relay voice instead of contacting with correspondent directly. The situation result in voice quality degradation and scalability problems. This paper proposes a novel approach "KaiKai" for applications to solve this problem. KaiKai can make two clients contact directly even these two clients reside in different NATs. By using protocol behavior analysis, KaiKai can cooperate with NATs with or without "Deny Incoming" option being set. We implemented KaiKai on Windows system and chose Skype as our demonstration application. Our experiments show that KaiKai can make two Skype clients connect directly behind different NATs. Consequently, the better quality of service and scalability can be achieved.

Original languageEnglish
Title of host publicationProceedings - 2006 International Conference on Intelligent Information Hiding and Multimedia Signal Processing, IIH-MSP 2006
Pages177-180
Number of pages4
DOIs
Publication statusPublished - 2006
Event2006 International Conference on Intelligent Information Hiding and Multimedia Signal Processing, IIH-MSP 2006 - Pasadena, CA, United States
Duration: 2006 Dec 182006 Dec 20

Publication series

NameProceedings - 2006 International Conference on Intelligent Information Hiding and Multimedia Signal Processing, IIH-MSP 2006

Other

Other2006 International Conference on Intelligent Information Hiding and Multimedia Signal Processing, IIH-MSP 2006
CountryUnited States
CityPasadena, CA
Period06-12-1806-12-20

All Science Journal Classification (ASJC) codes

  • Computer Science(all)

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