• The Journal of Korean Institute of Communications and Information Sciences
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• v.30 no.5B
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• pp.287-294
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• 2005

It is impossible to replace overnight the present Internet Protocol Version 4(IPv4)-based Internet with Internet Protocol Version 6(IPv6). These two protocols are expected to coexist for a number of years during the transition period. A number of transition mechanisms are proposed by Internet Engineering Task Force(IETF) Next Generation Transition Working Group(Ngtrans WG). However, most of them provide only the mechanism to initiate sessions from hosts within the IPv6 network to those within the IPv4 network, but do not support the initiation from IPv4 hosts to IPv6 ones. In this paper, we propose the IPv4-to-IPv6 Dual Stack Transition Mechanism(4to6 DSTM) which can operate even in the case that IPv4 clients in the IPv4 network initiate connections with dual stack servers in the IPv6 network.

• The KIPS Transactions:PartC
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• v.18C no.5
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• pp.343-360
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• 2011

The objective of this paper is to analyze and characterize to simulate routing observations on end-to-end routing circuits and a ping experiment of a virtual network after modeling, such as IPv6 migration, an OSPFv3 routing experiment based on an IPv6 environment, and a ping experiment for IPv4/IPv6 dual-stack networks and IPv6 network for OSPFv3 routing using IPv6 planning and operations in an OPNET Modeler. IPv6 deployment based largely on the integrated wired and wireless network was one of the research tasks at hand. The previous studies' researchers recommended that future research work be done on the explicit features of both OSPFv3 and EIGRP protocols in the IPv4/IPv6 environment, and more research should be done to explore how to improve the end-to-end IPv6 performance. Also, most related work was performed with an IPv4 environment but lacked studies related to the OSPFv3 virtual network based on an end-to-end IPv6 environment. Hence, this research continues work in previous studies in analyzing IPv6 migration, an OSPFv3 routing experiment based on IPv6, and a ping experiment for IPv4/IPv6 dual-stack networks and IPv6 network for OSPFv3 routing. In the not too distant future, before enabling the default IPv6, it would help to understand network design and deployment based on an IPv6 environment through IPv6 planning and operations for the end-user perspective such as success or failure of connection on IPv6 migration, exploration of an OSPFv3 routing circuit based on an end-to-end IPv6 environment, and a ping experiment for IPv4/IPv6 dual-stack networks and IPv6 network for OSPFv3 routing. We were able to observe an optimal route for modeling of an end-to-end virtual network through simulation results as well as find what appeared to be a fast ping response time VC server to ensure Internet quality of service better than an HTTP server.

• The KIPS Transactions:PartC
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• v.10C no.4
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• pp.519-524
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• 2003

During the period of co-existence of IPv4 and IPv6, Ipv6 over IPv4 tunneling technique is intended as a start-up transition mechanism. However, most of IPv4 firewalls do not support the IPv6 over IPv4 tunneling packet filtering. Finally, it is impossible that a user inside IPv4 firewall connects with an IPv6 host across IPv4 network. Without any additional hardware or changing the policy of IPv4 firewall, we solve this problem using proposed Double-encapsulation and applied-HTTP tunneling technique that are end-to-end solutions. This enables cheaper IPv6 migration solutions.

• Journal of Digital Contents Society
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• v.3 no.2
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• pp.163-176
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• 2002

It is necessary to change internet protect from version 4 (IPv4) to version 6 (IPv6). A converter from IPv4 to IPv6 is working in a laboratory not in practice. In this paper, we review internet protocol versions (IPv6) and design IPv4 to IPv6 converter. The IPv4 to IPv6 converter also has security prediction capability so as to deal with security problem when IPv4 packet is converted to IPv6 packet.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.32 no.1B
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• pp.61-70
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• 2007

An interworking translator for IPv6 and IPv4 services can be defined as an intermediate component between a native IPv4 host and a native IPv6 host to enable direct communication between them without requiring any modifications to the hosts. But if the host is a mobile node, triangle routing problem occurs, since Mobile IPv4 allows mobile node to roam transparently in my network. In this situation, mobile node must notify transfer information to its own home agent and correspondent node in IPv6 network. But current NAT-PT does not permit mobility header translation. Therefore, NAT-PT does not support efficient communication between Mobile IPv4 and Mobile IPv6. In this paper, we propose a mobility header conversion mechanism to resolve the triangle routing problem between Mobile IPv4 and Mobile IPv6.

• The KIPS Transactions:PartC
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• v.8C no.6
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• pp.783-792
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• 2001

It is well known that, in the near future, the lifetime of the IPv4 address space will be limited and available 32-bit IP network addresses will not be left any more. In order to solve such IPv4 address space problem in an effective way, the transition to the new version using IPv6 architecture is inevitably required. At present, it is impossible to convert IPv4 into IPv6 at a time, since the coverage and the size of today's Internet is too huge. Therefore, the coexistence of both IPv4 and IPv6 must be arranged in a special and practical fashion for rapid conversion on the whole. IP protocol translation has been proposed to ease the translation of the Internet from IPv4 to IPv6. This paper presents the design and implementation of a transparent transition service that translates packet header as they cross between IPv4 and IPv6 networks. IPv4/IPv6 Translation Protocol is written in c source code and is tested by the local test recommended by ISO, which has the most excellent error detection function. The test was processed with a test scenario and it was found that the results were successful.

• The Journal of the Korea institute of electronic communication sciences
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• v.2 no.4
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• pp.215-221
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• 2007

IPv6 is a protocol to solve the address space limitation of IPv4 by IETF. Many transition mechanism to communicate between IPv4 and IPv6 in mixed IPv4/IPv6 network are proposed. DSTM tunneling is a mechanism that dual stack in IPv6 network is able to communicate with node in IPv4 network by dynamic allocating the IPv4 address. This mechanism supports the execution of IPv4 dependent application without modification at IPv6 network. In this paper, we explain the security vulnerability at DSTM network for DHCP attack, TEP attack, and source spoofing attack then describe the result of attacks.

• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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• 2006.06a
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• pp.477-480
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• 2006

IPv6는 IPv4의 주소 부족을 해결하기 위해 1998년 IETF에서 표준화된 프로토콜이다. 현재 IPv4가 수축으로 되어 있는 인터넷을 동시에 IPv6로 전환하는 것은 불가능하므로 IPv4/IPv6 혼재네트워크를 거쳐 IPv6 순수 망으로 전환될 것이다. 본 논문에서는 혼재네트워크에서 IPv4 망과 IPv6 망간의 통신을 가능하게 해주는 IPv6 전환 메커니즘 중 터널링 방식에 대해 기술하고, 보안 취약성을 테스트하기 위해 동일한 보안 취약성에 대해 각각 IPv4 패킷, IPv6 패킷, 터널링된 패킷을 캡쳐할 수 있는 구축방안을 제안한다. 제안된 방식은 IPv4, IPv6, 터널링 패킷에 대한 분석이 가능하므로 IPv6 지원을 계획하는 침입탐지, 침입차단 시스템에 활용이 가능하다.

• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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• 2006.06a
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• pp.340-343
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• 2006

IPv6는 차세대 네트워크를 구축하기 위한 가장 핵심적인 기술로써, 풍부한 주소공간과 이동성 지원, 보안기능 강화 등 IPv4에 비해 많은 이점을 지니고 있다. 또한 IPv4의 주소 고갈 문제를 해결하기 위해 IPv6로의 전환이 당연시 되고 있으나 IPv4/IPv6 혼재망이 과도기적인 입장에서 대안이 될 수 있다. 그러나 IPv4/IPv6 혼재망과 IPv6망은 IPv4에서와 마찬가지로 프로토콜 기능상의 많은 문제점을 안고 있다. 본 논문에서는 IPv6망 및 IPv4/IPv6 혼재 네트워크상에서의 보안 취약점과 실험 결과를 기술하였다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2002.11a
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• pp.323-326
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• 2002

In this paper, we propose the new experimental using gif tunneling based on IPv4 and IPv6. HVIC developed by ETRI-SNU and vic, net by UCL in England were used during the tests. The networks used in this experiments are TEIN (TEIN:TransEurasia Information Network) that recently established between Korea and Europe and ATM-based IPv6 native network which connecting among ETRI, KOREN, SNU. We take following three scenarios into account. The one is the IPv6 tunneling based on IPv4, the other is IPv6 tunneling on IPv6 network, and the third is IPv6 native network based on ATM we propose the new experimental method using gif tunneling between IPv4 and IPv6.