• Title, Summary, Keyword: NAT

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A Study on Relay Server Topology inside NAT for Pure P2P (순수 P2P를 위한 NAT 내부의 Relay Server 토폴로지에 관한 연구)

  • Shon, Hyung-Doh;Kang, Seung-Chan
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.12 no.3
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    • pp.575-580
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    • 2008
  • Lately, the use of the NAT has become unavoidable with the increase of P2P traffic along with the exhaustion of IPv4 IP address. Due to NAT properties, NAT's internal host can only be connected through a relay method using the outside server. Accordingly, there is a lot of resource exhaustion of the relay server on the NAT exterior and network traffic increases. This essay proposes a topology that can form sessions to the NAT interior from the NAT exterior and that will decrease network traffic by placing NAT exterior relay servers in the NAT interior.

IPsec Support for NAT-PT in IPv6 Transition Mechanisms (IPv6 전환 기술 중 NAT-PT에서의 IPsec 적용 방안)

  • Choi Inseok;Kim Younghan;Park Yongseok;Jung Souhwan
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.30 no.11B
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    • pp.736-743
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    • 2005
  • NAT-PT is one of the IPv6 transition mechanisms, as defined in RFC2766, allowing IPv6-only devices to communicate with IPv4-only devices and vice versa. In NAT-PT, sender fail to verify TCP/UDP checksum and authentication data due to IP translation in the NAT-PT server The NAT-PT, therefore, has a limit to applying the IPsec that provides the end-to-end security such as confidentiality, authentication, and integrity. This paper proposes a scheme to apply the IPsec using IP HTI in NAT-PT environment.

The Spot Scanning Irradiation with $^{11}C$ Beams

  • Urakabe, Eriko;Kanai, Tatsuaki;Kanazawa, Mitsutaka;Kitagawa, Atsushi;Suda, Mitsuru;Iseki, Yasushi;Tomitani, Takehiro;Shimbo, Munefumi;Torikoshi, Masami
    • Proceedings of the Korean Society of Medical Physics Conference
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    • pp.188-191
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    • 1999
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