An SDN-based NAT Traversal Mechanism for End-to-end IoT Networking

Hsu Chien Wang, Chien Chen, Ssu Hsuan Lu

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

In Internet of Things (IoT) environment, devices often do not have public IPs to communicate with other devices due to addresses getting exhausted. Therefore, Network Address Translation (NAT) is used to translate IPs. Furthermore, NATs often also filter messages just like firewalls, and different types of NATs have different behavior on filtering. This causes difficulties for devices direct communication. However, although there are some NAT traversal methods can be used to traverse NATs, those methods may produce extra overhead or require need to distinguish the types of NATs at first. In this paper, an SDN-based NAT traversal mechanism is proposed to deal with the NAT traversal problem without previous mentioned problems. The centralized management property of software-defined networking (SDN) is utilized to develop this SDN-based NAT traversal mechanism. The functions of NATs are implemented on the controller as an NAT application. The controller controls the translating of addresses and ports, so the controller can own all information to traverse all kinds of NATs. From simulation results, the proposed NAT traversal method can successfully use the same process to traverse all kinds of NATs without producing extra overhead. Furthermore, the NATs are OpenFlow switches in the data plane, so it is flexible to adjust the settings of NATs.

Original languageEnglish
Title of host publication2019 20th Asia-Pacific Network Operations and Management Symposium
Subtitle of host publicationManagement in a Cyber-Physical World, APNOMS 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9784885523205
DOIs
StatePublished - Sep 2019
Event20th Asia-Pacific Network Operations and Management Symposium, APNOMS 2019 - Matsue, Japan
Duration: 18 Sep 201920 Sep 2019

Publication series

Name2019 20th Asia-Pacific Network Operations and Management Symposium: Management in a Cyber-Physical World, APNOMS 2019

Conference

Conference20th Asia-Pacific Network Operations and Management Symposium, APNOMS 2019
CountryJapan
CityMatsue
Period18/09/1920/09/19

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