• Title, Summary, Keyword: Address translation

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Design and Implementaion of IPv4/IPv6 Translation Protocol (IPv4/IPv6 변환 프로토콜의 설계 및 구현)

  • Park, Seok-Cheon;Lee, Gwang-Bae
    • 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.

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Design and Implementation of NAPT Function Based on Wireless Access Point (무선 액세스 포인트 기반의 NAPT 기능 설계 및 구현)

  • 이승호;송병훈;정광수;오승준
    • Proceedings of the Korean Information Science Society Conference
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    • pp.394-396
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    • 2002
  • 최근 다양한 무선 인터넷 기술 중에서도 무선랜을 이용한 서비스는 기존의 유선랜 기반의 서비스들을 그대로 적용 할 수 있다는 큰 장점 때문에 상당한 관심이 집중되고 있다. 무선랜 기술의 핵심 중 하나는 기능적으로 유무선의 호스트들 간의 서비스 연동을 담당하는 장비인 무선 액세스 포인트에 있다. 현재 국내외에서 상용화 된 대부분의 액세스 포인트 장비는 단순한 브리지 및 게이트웨이 기능과 인터넷 주소의 부족에 의한 해결책으로 기본적인 NAT(Network Address Translation) 기능만을 지원한다. 그러므로 다양한 응용에 따른 서비스의 연동을 가능하게 하는 기술에 대한 지원이 미비하다 할 수 있다. 사설망과 공인망 사이의 서비스 연동을 NAT 기반의 네트워크에서 동작하도록 하기 위한 연구가 바로PAT(Port Address Translation) 기술이다. 본 논문에서는 기존의 NAT 기반의 모듈들과 효과적으로 연동할 수 있는 최적화된 PAT 기능을 설계 및 구현하였다. 그리고 이를 통합한NAPT 액세스 포인트를 개발하여 그 기능을 시험하고 검증하였다.

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The case study for Implementation and verification of Dynamic NAT and PAT (동적 NAT과 PAT의 구현과 검증 사례연구)

  • Kim, No-Whan
    • The Journal of the Korea institute of electronic communication sciences
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    • v.10 no.10
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    • pp.1131-1138
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    • 2015
  • As the size of the internet market grows rapidly, the number of IPv4 addresses available is being exhausted, while transition to IPv6 is being delayed. As the best alternative solution, Network Address Translation(NAT) scheme is being used. It connects the public internet network with the private internet network in order to reduce the waste of IPv4 addresses space. The purpose of this paper is to study the effective example of network based on common virtual network using Packet Tracer with topology designed rather than usual theoretical approach in Dynamic NAT and PAT, which allows more efficient use of address space.

The Study on Security Vulnerabilities in IPv6 Autoconfiguration

  • Kim, Myung-Eun;Seo, Dong-Il
    • 제어로봇시스템학회:학술대회논문집
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    • pp.1545-1549
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    • 2005
  • According as computer is supplied in a lot of homes and offices and Internet use increases, various service based on the Internet. Including wireless PDA in the future, many devices such as Internet telephone, TV, refrigerator and oven will be connected on the Internet and Internet address exhaustion will be raised to serious problem gradually. Today, the IPv4 address exhaustion problem has been solved partially using NAT (Network Address Translation) however, the transition to next Generation Internet will be accelerated because of advantages such as mobility, security service, QoS, and abundant IP addresses. In IPv6, all hosts are designed to create and set their address automatically without manager's intervention using Neighbor Discovery Protocol. But, when an IPv6 host sets its address automatically, there are serious security vulnerabilities. In this paper, we analysis security vulnerabilities in auto-configuration and provide security requirements for secure auto-configuration.

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Dual Addressing Scheme in IPv6 over IEEE 802.15.4 Wireless Sensor Networks

  • Yang, Soo-Young;Park, Sung-Jin;Lee, Eun-Ju;Ryu, Jae-Hong;Kim, Bong-Soo;Kim, Hyung-Seok
    • ETRI Journal
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    • v.30 no.5
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    • pp.674-684
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    • 2008
  • This paper proposes a dual addressing scheme (DAS) for IPv6 over IEEE 802.15.4 wireless sensor networks (WSN). DAS combines a global unicast address to cope with association link changes and node mobility, and it links local addresses to lighten the overhead of the system to save energy and resources. This paper describes DAS address formats, address autoconfiguration, and address translation tables in the gateway. A detailed description of DAS is provided through examples. Simulations are performed to demonstrate the performance improvements of the DAS compared with the IPv6-based WSN, which uses the conventional single address.

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An Efficient Address Mapping Table Management Scheme for NAND Flash Memory File System Exploiting Page Address Cache (페이지 주소 캐시를 활용한 NAND 플래시 메모리 파일시스템에서의 효율적 주소 변환 테이블 관리 정책)

  • Kim, Cheong-Ghil
    • Journal of Digital Contents Society
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    • v.11 no.1
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    • pp.91-97
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    • 2010
  • Flash memory has been used by many digital devices for data storage, exploiting the advantages of non-volatility, low power, stability, and so on, with the help of high integrity, large capacity, and low price. As the fast growing popularity of flash memory, the density of it increases so significantly that its entire address mapping table becomes too big to be stored in SRAM. This paper proposes the associated page address cache with an efficient table management scheme for hybrid flash translation layer mapping. For this purpose, all tables are integrated into a map block containing entire physical page tables. Simulation results show that the proposed scheme can save the extra memory areas and decrease the searching time with less 2.5% of miss ratio on PC workload and can decrease the write overhead by performing write operation 33% out of total writes requested.

Extended Security Policy Protocol that considers NAT-PT (NAT-PT를 고려한 확장된 보안정책 프로토콜)

  • Hyun, Jeung-Sik;Hwang, Yoon-Cheol;Um, Nam-Kyoung;Lee, Sang-Ho
    • The KIPS Transactions:PartC
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    • v.10C no.5
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    • pp.549-556
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    • 2003
  • In this paper, we describe security policy protocol to provide end-to-end IPSec security service that considers characteristics of NAT-PT. NAT-PT is describing IP address translation and protocol translation for communication on heterogeneous IP network by one of the technology that is proposed by IETF to provide communication between IPv4 and IPv6 network in transitional step to evolve by IPv6 network to IPv4 network. But NAT-PT has the limitation on security one of the essential requirement of Internet. Therefore, we propose the extended security protocol that offers a security policy negotiation that should be achieved for the first time to provide end-to-end IPSec security service that considers NAT-PT in this paper.

Erase Group Flash Translation Layer for Multi Block Erase of Fusion Flash Memory (퓨전 플래시 메모리의 다중 블록 삭제를 위한 Erase Croup Flash Translation Layer)

  • Lee, Dong-Hwan;Cho, Won-Hee;Kim, Deok-Hwan
    • Journal of the Institute of Electronics Engineers of Korea CI
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    • v.46 no.4
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    • pp.21-30
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    • 2009
  • Fusion flash memory such as OneNAND$^{TM}$ is popular as a ubiquitous storage device for embedded systems because it has advantages of NAND and NOR flash memory that it can support large capacity, fast read/write performance and XIP(eXecute-In-Place). Besides, OneNAND$^{TM}$ provides not only advantages of hybrid structure but also multi-block erase function that improves slow erase performance by erasing the multiple blocks simultaneously. But traditional NAND Flash Translation Layer may not fully support it because the garbage collection of traditional FTL only considers a few block as victim block and erases them. In this paper, we propose an Erase Group Flash Translation Layer for improving multi-block erase function. EGFTL uses a superblock scheme for enhancing garbage collection performance and invalid block management to erase multiple blocks simultaneously. Also, it uses clustered hash table to improve the address translation performance of the superblock scheme. The experimental results show that the garbage collection performance of EGFTL is 30% higher than those of traditional FTLs, and the address translation performance of EGFTL is 5% higher than that of Superblock scheme.

An Integrated Management Scheme for Wired and Wireless Networks Using Mobile Agents (이동 에이전트를 이용한 유무선 네트워크의 통합관리 기법)

  • Na, Ho-Jin;Cho, Kyung-San
    • Journal of the Korea Society of Computer and Information
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    • v.15 no.11
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    • pp.117-124
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    • 2010
  • Appling centralized network management architecture SNMP(Simple Network Management Protocol) to wireless networks causes the network overhead, NAT(Network Address Translation) problem on AP, and performance degradation of mobile nodes. In this paper, we propose an integrated management scheme for wired and wireless networks using mobile agents in order to solve above problems. In our proposed scheme, SNMP is applied to manage wired networks and MAs of SNMP are implemented in APs or wireless nodes to manage wireless networks. In addition, we propose a method to reduce the redundant OID information within SNMP response messages. Through the analysis, we show that our proposal resolves the given problems and reduces the processing delay of the wireless nodes.

Design and Implementation of the Internetworking Architecture between IPv4 and IPv6 in IMS based Mobile networks (IMS기반 이동패킷망에서의 IPv4/IPv6 연동구조 설계 및 구현)

  • You, Seugn-Kwan;Kim, Young-Han
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.43 no.11
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    • pp.168-174
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    • 2006
  • In this paper, we propose an architecture for communication between the IPv4-based UA and the IPv6-based UA in IMS based Mobile Networks, and design and implement the IMS protocol Translator for verification of the architecture. For the design of the internetworking between the IPv4 and the IPv6, we analyze the transition mechanisms and investigate the protocol translator. The IMS protocol translator is composed of the IMS-ALG(IP Multimedia Subsystem - Application Level Gateway) and TrGW(Translation Gateway), and the conformance of these components are verified by experiments.