Internet Protocol Version 6 (IPv6) - Internet Protocol Version 4 (IPv4) Network Address, Port & Protocol Translation And Multithreaded DNS-Application Gateway

Due to emerging growth in Internet, deployment of IPv6 has becomemandatory. Transition of IPv4 to IPv6 is not a single day task. Due to compatibilityissues, both the protocols will coexist for years during the transition period. In this paperwe will study the design and implementation of an IPv6 to IPv4 translator which providesthe communication mechanism from IPv6 only to IPv4 only networks and vice versa, bydoing alteration in IP header of packets. The multithreaded DNS application gateway isalso implemented to simultaneously serve multiple DNS queries and convert DNS repliesfrom IPv4 to IPv6 or vice versa

Piloto IPv6 numa rede Wi-Fi

A implementação em grande escala do protocolo IPv6 nas redes de computadores tem vindo sucessivamente a ser protelada no tempo, devido a diversos factores. Entre os principais, destaca-se o facto de os servi ̧cos continuarem a ser disponibilizados quase exclusivamente em IPv4, retirando ao utilizador final as principais vantagens da utilização nativa da pilha protocolar IPv6 nos postos de trabalho. Grande parte das estratégias actuais de migração para o protocolo IPv6 passa pela coexistência de ambas as pilhas protocolares. Uma abordagem alternativa passa pela conversão de protocolos de forma a permitir aos utilizadores utilizarem IPV6 nativo, mesmo quando contactam servi ̧cos em IPv4. Para o efeito, é utilizado NAT-PT (Network Address Translation – Protocol Translation) que, além de fazer a tradução de endereços , faz também a adaptação protocolar entre as pilhas protocolares IPv6 (a jusante) e IPv4 (a montante). O presente trabalho descreve os resultados dos testes de conectividade realizados para avaliar a viabilidade da utilização de uma única da pilha protocolar IPv6 para endereçamento de clientes no cenário de uma rede Wi-Fi.info:eu-repo/semantics/publishedVersio

Network performance evaluation of 6to4 tunneling

Several types of IPv6 transition mechanisms have been developed to facilitate the migration of IPv4 to the new protocol, IPv6. Although all transition mechanisms have the same objective, the process necessitates compliance with their respective capabilities. This paper focuses on the evaluation of the transition mechanisms namely 6to4 tunneling in terms of data transmission. The assessment is based upon experimental work that is conducted on a controlled environment. User-to-user network performance software is used to obtain the throughput, round trip time and tunneling overhead for TCP and UDP transmission protocol. The performance of TCP and UDP through 6to4 tunnel is then compared over the native IPv4 and IPv6 environment. As a result, the findings prove the ease of TCP data transmission via the tunnel compared to both native networks. In contrast, the UDP implementations show the slight difference for them. © 2012 IEEE

Comparative study of Internet Protocol

In today's generation, most of today's Internet is using IPv4, Now twenty years old. IPv4 is now uploading with the Problem of meeting growing Internet requirements and it is a shortage of IPv4 addresses, which are necessary for all new the machines added to the Internet.IPv6, fixes a series of problems In IPv4 addresses. It also adds many improvements to IPv4 and provides a better network. IPv6 is expected to gradually replace IPv4, with the two coexisting for several years during a transition period. As the population is increasing day by day, similarly the Internet isAlso growing and expanding more and more and more and more,Government, scientists and universities are looking for new waysTo send information quickly and powerfully The two new InternetsDevelop new and faster technologies to improve research andCommunication, and both projects are expected toEventually improve the current commercial Internet. A big advantage of IPv6 is that it simplifies and solves the problem. The scarcity of IP addresses. In today's Internet technology, Controls in the United States 74% of the 4 million IP addresses, while the amount that China has is equal only to the University California, but its share of 80 million users. This is the main reason Asian countries, especially China, Japan and South Korea, Show interest in IPv6 version technology

Implementation and Evaluation of Protocols Translating Methods for IPv4 to IPv6 Transition

Today millions of computers are interconnected using the Internet Protocol version 4 (IPv4) and can not switch to the new version, IPv6, simultaneously. For this reason the IETF has defined a number of mechanisms for transitioning to the new protocol in a progressively and controlled manner. On the other hand, Internet Service Providers (ISP) will not have new IPv4 global addresses to offer in the near future due to the fact that these addresses will be exhausted. A very interesting alternative for ISPs is to use IPv6 global addresses and, by some transitional method, access the current IPv4 backbone. This study aims to compare two methods of transparent access to the IPv4 Internet backbone, from networks that are "IPv6 only". To make the comparison, a software was developed, implementing an Application Layer Gateway (ALG), and Ecdysis was used to implement NAT64. Both trials used a network IPv6 Test Bed. This paper details the design principles and fundamental aspects of the ALG implementation, as well as the implementation of NAT64. Finally, we present the tests performed and conclusions drawn on the test platform.Facultad de Informátic

Implementación y evaluación de métodos de traslación de protocolos para la transición IPv4-IPv6

En la actualidad millones de computadores están interconectados usando Internet Protocol version 4 (IPv4) y es imposible cambiar a la nueva versión, IPv6, en forma simultánea cada uno de ellos. Por tal motivo la IETF ha definido una serie de mecanismos para hacer una transición paulatina y controlada hacia el nuevo protocolo. Por otro lado, en un futuro cercano los proveedores de acceso a Internet (ISP) ya no tendrán nuevas direcciones globales IPv4 que ofrecer a los usuarios finales debido al agotamiento de este tipo de direcciones [1]. Una alternativa muy interesante con la que cuentan los ISP es usar direcciones globales IPv6 y luego, por algún método de transición, acceder al backbone actual de IPv4. El objetivo del presente trabajo es comparar, dos métodos de acceso transparente al backbone de Internet IPv4, desde redes ―Solo IPv6‖. Para hacer la comparativa de ambos mecanismos se desarrolló un software que implementa un ALG (Application Layer Gateway), y se utilizó Ecdysis para implementar NAT64. Ambos ensayos utilizaron una red Test Bed IPv6. En el documento se detallan los principios de diseño y los aspectos fundamentales de la implementación del ALG, como así también la implementación del NAT64. Finalmente se presentan los test realizados y las conclusiones obtenidas sobre la plataforma de prueba.Presentado en el VI Workshop Arquitectura, Redes y Sistemas Operativos (WARSO)Red de Universidades con Carreras en Informática (RedUNCI

Mobile IP Address Efficiency

In future wireless networks, Mobile IP will be widely deployed as a general mobility protocol. Currently, in the protocol each mobile node (MN) should have one public home address to identify itself when it is away from home. Unlike the stationary host, the MN cannot simply use private addresses when NAT (Network Address Translation) is enabled. How to assign public addresses among mobile nodes is important to save the already limited IPv4 addresses. Even though Mobile IPv6 can provide a large address space, when communicating with IPv4 based hosts, the MN still needs to use one public IPv4 address. Protocol translation can map between IPv6 and IPv4 addresses; however, it is a NAT-based approach and breaks end-to end communications. From a new perspective, we propose an address-sharing mechanism that allows a large number of MNs to share only one IPv4 public address while avoiding most of the drawbacks of NAT

Automatic IPv4 to IPv6 Transition D1.1 - Network Topologies and Transition Procedures

Over the last decade, IPv6 has established itself as the most mature network protocol for the future Internet. While its acceptance and deployment remained so far often limited to academic networks, its recent deployment in both core networks of operators (often for management purposes) and its availability to end customers of large ISPs demonstrates its deployment from the inside of the network leading to the edges. For many enterprises, the transition remains an issue today. This remains a tedious and error prone task for network administrators. In the context of the Cisco CCRI project, we aim at providing the necessary algorithms and tools to enable this transition to become automatic. In this report, we present the first outcome of this work, namely an analysis of the transition procedure and a model of target networks on which our automatic approach will be experimented. We also present a first version of a set of transition algorithms that will be refined through the study

Virtual Learning System Constructing Based on IPv6 and Grid

下一代互联网(IPv6)及网格技术提供了资源共享与工作分散运作的环境,正好弥补了传统数字学习系统不足之处。文章首先回顾了IPv6的发展现状,然后基于下一代互联网及网格技术构建一个虚拟学习系统(VLMS),设计具有网格中间件的功能,同时提出网格服务开发设计的技术,最后以系统实现案例揭示虚拟学习网格系统的运作,提供一个可共享的学习网格平台。IPv6 and grid computing provide a resources-sharing and job distributing environments. It remedies the insufficiency of the traditional learning systems. In this paper,firstly the development of IPv6 is reviewed,thus a grid middleware based on the virtual learning management system(VLMS)that is developed. Simultaneously,some ideas to develop the grid services are proposed in this paper. Finally,the operation of the digital learning grid system with the learning scenarios is illustrated to accomplish a shaerable virtual learning grid system

Mecanismos de transición hacia redes IPv6

Debido a que el Protocolo de red de Internet actual, llamado IPv4, está alcanzando actualmente sus propios límites de diseño y se muestra incapaz de proveer una respuesta adecuada a las nuevas características deseables para Internet, en 1995 la Internet Engineering Task Force (IETF) comenzó a desarrollar un nuevo protocolo, llamado IPv6, para reemplazar al anterior. Contempla mejoras fundamentalmente en el espacio de direccionamiento y nuevas características como servicios de tiempo real, calidad de servicio, seguridad intrínseca, etc. El crecimiento de Internet ha originado que cada vez más computadoras necesiten conectarse a ella. Hay una enorme cantidad de dispositivos como teléfonos celulares, cámaras de vigilancia, dispositivos inalámbricos, etc, que necesitarán, en el mediano plazo, sus propias direcciones IP para conectarse a Internet, incluso algunos necesitarán varias direcciones. Ésta es la principal causa que lo está llevando a sus límites de diseño, pues en la versión actual del protocolo, no existen suficientes direcciones disponibles. El protocolo IPv6 presenta un nuevo desafío que es su despliegue para ponerlo en producción. En la actualidad millones de computadores están interconectados al backbone de Internet usando IPv4 y es imposible cambiar a la nueva versión, IPv6, en forma simultánea cada uno de ellos para que sigan trabajando normalmente, fundamentalmente por la imposibilidad de actualizar a IPv6 sistemas operativos de routers intermedios, servidores web (HTTP), o de correo (SMTP), etc sin soporte IPv6; también se presentan problemas en servidores de nombre (DNS) sin registros AAAA o A6 para direcciones IPv6, etc. El protocolo IPv6 es un protocolo “disruptivo”. El término disruptivo tiene sus orígenes en el libro “El dilema de Innovador” de Clayton Christensen, donde trata como los desarrollos tecnológicos pueden tener un impacto económico. Se basa en un estudio de la industria de Discos Rígidos, a través de varios años y varios cambios de tecnologías. Para nuestro caso, no se trata de quitar o deshabilitar IPv4 para usar, habilitar o instalar IPv6. Tampoco es una una migración, pues no es un día, mes o año (como el Y2K) para realizar la migración. Esto es una actualización necesaria de IP, permitiendo que ambas versiones convivan al mismo tiempo y/o independientemente. Por tal motivo la IETF ha definido una serie de mecanismos para hacer una suave transición donde convivan por un largo tiempo ambos protocolos. El presente trabajo ayudará al lector a lograr una transición controlada hacia el nuevo protocolo. El objetivo del presente trabajo fue realizar un Análisis, Evaluación y Comparación de Métodos de Transición del protocolo IPv4 al protocolo IPv6. Las comparaciones se hicieron usando un Test Bed llamado CODAREC6, permitiendo colaborar en el lento, pero inexorable camino hacia la internet sobre IPv6.Facultad de Informátic