A gerência de redes de computadores cresce a, medida que são necessárias redes mais seguras, menos vulneráveis a falhas e para reduzir a sobrecarga de trabalho dos administradores de rede. Gerenciar elementos físicos das redes de computadores tem sido a tônica da gerencia de redes. Porem, gerenciar as aplicações também a muito importante, pois são o ponto de interação do usuário com a rede. Há grupos trabalhando na padronização da gerencia das aplicações, através da definição de Management Information Bases (MIBs) específicas para as aplicações. Recentemente foi publicada a MIB específica para correio eletrônico Internet [KIL 94]. Alem de grupos oficiais, como o IFIP Working Group 6.6, outras pessoas, também a nível de Brasil, tem desenvolvido trabalhos na áreas de gerencia de aplicações [CAR 94]. Este trabalho propõe um paradigma para gerencia de uma das entidades funcionais do Message Handling System (MHS) X.400, o Agente de Transferência de Mensagens (ATM). O MHS X.400 e a aplicação de correio eletrônico para o ambiente OSI. O correio eletrônico a uma das aplicações mais populares na comunidade de redes de computadores e atualmente tem sido cogitado como base para muitas outras aplicações. A definição conceitual do paradigma de gerencia baseou-se na estrutura de gerencia do modelo OSI, mas a implementação efetiva do protótipo utiliza o protocolo de gerencia da arquitetura Internet, o SNMP. As fases de definição e levantamento dos requisitos para gerencia de um Agente de Transferência de Mansagens (ATM) basearam-se nos modelos organizacional, funcional e informacional definidos pela ISO. 0 modelo organizacional define a hierarquia entre as entidades de gerencia, ou seja, a hierarquia entre agentes e gerentes. O modelo funcional descreve os requisitos para gerencia do ATM segundo as áreas funcionais do modelo: gerencia de fa1has, gerencia de configuração, gerencia de contabilidade, gerencia de desempenho e gerencia de segurança. 0 modelo informacional define a MIB, ou seja, os objetos que serão monitorados. A validação do modelo conceitual foi realizada através da implementação do protótipo. No protótipo foram utilizados os ambientes ISO Development Environment (ISODE), PP e SunNet Manager (SNM). A implementação do protótipo, alem de validar os conceitos te6ricos, foi útil para a obtenção de experiência com relação a integração entre os diversos ambientes. / The network management has been grown due to the need of more secure networks and to reduce the network adminstrator work. The network physical elements management has been the most important topic in network management, but application management is also important because it is the interaction point between users and networks. There are groups working on standardization of application management defining Managemet Information Bases (MIBs) specifics for application management. A Management Information Base for Internet eletronic mail [KIL 941 was recently published. Beyond official groups, such as IFIP Working Group 6.6, there are other people investigating the management process of several well-known applications [CAR 94]. This work proposes a paradigm for the management of one funcional entity of Message Handlig System (MHS) X.400, the Message Transfer Agent (MTA). The MHS X.400 is the eletronic mail application for OSI environment. The eletronic mail is one of most popular network application and it has been indicated to be the base for other applications. The conceptual definition of management paradigm was based in OSI management framework, but the actual prototype implementation uses the SNMP protocol from Internet framework. The definition and elicitation of management requirements for MTA management were based on organization, function and information models defined by ISO. The organization model defines the hierarchy between the management entities, i.e., the hierarchy between agents and managers. The organization model describes the MTA management requirements by the functional areas: fault management, configuration managemet, accounting management, performance management and security managent. The information model defines the MIB, i.e., the managed objects. The conceptual model validation was realized throught prototype implementation. For this validation some softwares were used such as ISO Environment Development (ISODE) and PP that are sharewares commonly used in academic environments and SunNet Manager (SNM) that is a comercial software. This implementation prototype was helpful to apply the network management concepts and to get knowhow about real network managemnt softwares utilization and integration.

A gerência de redes de computadores cresce a, medida que são necessárias redes mais seguras, menos vulneráveis a falhas e para reduzir a sobrecarga de trabalho dos administradores de rede. Gerenciar elementos físicos das redes de computadores tem sido a tônica da gerencia de redes. Porem, gerenciar as aplicações também a muito importante, pois são o ponto de interação do usuário com a rede. Há grupos trabalhando na padronização da gerencia das aplicações, através da definição de Management Information Bases (MIBs) específicas para as aplicações. Recentemente foi publicada a MIB específica para correio eletrônico Internet [KIL 94]. Alem de grupos oficiais, como o IFIP Working Group 6.6, outras pessoas, também a nível de Brasil, tem desenvolvido trabalhos na áreas de gerencia de aplicações [CAR 94]. Este trabalho propõe um paradigma para gerencia de uma das entidades funcionais do Message Handling System (MHS) X.400, o Agente de Transferência de Mensagens (ATM). O MHS X.400 e a aplicação de correio eletrônico para o ambiente OSI. O correio eletrônico a uma das aplicações mais populares na comunidade de redes de computadores e atualmente tem sido cogitado como base para muitas outras aplicações. A definição conceitual do paradigma de gerencia baseou-se na estrutura de gerencia do modelo OSI, mas a implementação efetiva do protótipo utiliza o protocolo de gerencia da arquitetura Internet, o SNMP. As fases de definição e levantamento dos requisitos para gerencia de um Agente de Transferência de Mansagens (ATM) basearam-se nos modelos organizacional, funcional e informacional definidos pela ISO. 0 modelo organizacional define a hierarquia entre as entidades de gerencia, ou seja, a hierarquia entre agentes e gerentes. O modelo funcional descreve os requisitos para gerencia do ATM segundo as áreas funcionais do modelo: gerencia de fa1has, gerencia de configuração, gerencia de contabilidade, gerencia de desempenho e gerencia de segurança. 0 modelo informacional define a MIB, ou seja, os objetos que serão monitorados. A validação do modelo conceitual foi realizada através da implementação do protótipo. No protótipo foram utilizados os ambientes ISO Development Environment (ISODE), PP e SunNet Manager (SNM). A implementação do protótipo, alem de validar os conceitos te6ricos, foi útil para a obtenção de experiência com relação a integração entre os diversos ambientes. / The network management has been grown due to the need of more secure networks and to reduce the network adminstrator work. The network physical elements management has been the most important topic in network management, but application management is also important because it is the interaction point between users and networks. There are groups working on standardization of application management defining Managemet Information Bases (MIBs) specifics for application management. A Management Information Base for Internet eletronic mail [KIL 941 was recently published. Beyond official groups, such as IFIP Working Group 6.6, there are other people investigating the management process of several well-known applications [CAR 94]. This work proposes a paradigm for the management of one funcional entity of Message Handlig System (MHS) X.400, the Message Transfer Agent (MTA). The MHS X.400 is the eletronic mail application for OSI environment. The eletronic mail is one of most popular network application and it has been indicated to be the base for other applications. The conceptual definition of management paradigm was based in OSI management framework, but the actual prototype implementation uses the SNMP protocol from Internet framework. The definition and elicitation of management requirements for MTA management were based on organization, function and information models defined by ISO. The organization model defines the hierarchy between the management entities, i.e., the hierarchy between agents and managers. The organization model describes the MTA management requirements by the functional areas: fault management, configuration managemet, accounting management, performance management and security managent. The information model defines the MIB, i.e., the managed objects. The conceptual model validation was realized throught prototype implementation. For this validation some softwares were used such as ISO Environment Development (ISODE) and PP that are sharewares commonly used in academic environments and SunNet Manager (SNM) that is a comercial software. This implementation prototype was helpful to apply the network management concepts and to get knowhow about real network managemnt softwares utilization and integration.

A gerência de redes de computadores cresce a, medida que são necessárias redes mais seguras, menos vulneráveis a falhas e para reduzir a sobrecarga de trabalho dos administradores de rede. Gerenciar elementos físicos das redes de computadores tem sido a tônica da gerencia de redes. Porem, gerenciar as aplicações também a muito importante, pois são o ponto de interação do usuário com a rede. Há grupos trabalhando na padronização da gerencia das aplicações, através da definição de Management Information Bases (MIBs) específicas para as aplicações. Recentemente foi publicada a MIB específica para correio eletrônico Internet [KIL 94]. Alem de grupos oficiais, como o IFIP Working Group 6.6, outras pessoas, também a nível de Brasil, tem desenvolvido trabalhos na áreas de gerencia de aplicações [CAR 94]. Este trabalho propõe um paradigma para gerencia de uma das entidades funcionais do Message Handling System (MHS) X.400, o Agente de Transferência de Mensagens (ATM). O MHS X.400 e a aplicação de correio eletrônico para o ambiente OSI. O correio eletrônico a uma das aplicações mais populares na comunidade de redes de computadores e atualmente tem sido cogitado como base para muitas outras aplicações. A definição conceitual do paradigma de gerencia baseou-se na estrutura de gerencia do modelo OSI, mas a implementação efetiva do protótipo utiliza o protocolo de gerencia da arquitetura Internet, o SNMP. As fases de definição e levantamento dos requisitos para gerencia de um Agente de Transferência de Mansagens (ATM) basearam-se nos modelos organizacional, funcional e informacional definidos pela ISO. 0 modelo organizacional define a hierarquia entre as entidades de gerencia, ou seja, a hierarquia entre agentes e gerentes. O modelo funcional descreve os requisitos para gerencia do ATM segundo as áreas funcionais do modelo: gerencia de fa1has, gerencia de configuração, gerencia de contabilidade, gerencia de desempenho e gerencia de segurança. 0 modelo informacional define a MIB, ou seja, os objetos que serão monitorados. A validação do modelo conceitual foi realizada através da implementação do protótipo. No protótipo foram utilizados os ambientes ISO Development Environment (ISODE), PP e SunNet Manager (SNM). A implementação do protótipo, alem de validar os conceitos te6ricos, foi útil para a obtenção de experiência com relação a integração entre os diversos ambientes. / The network management has been grown due to the need of more secure networks and to reduce the network adminstrator work. The network physical elements management has been the most important topic in network management, but application management is also important because it is the interaction point between users and networks. There are groups working on standardization of application management defining Managemet Information Bases (MIBs) specifics for application management. A Management Information Base for Internet eletronic mail [KIL 941 was recently published. Beyond official groups, such as IFIP Working Group 6.6, there are other people investigating the management process of several well-known applications [CAR 94]. This work proposes a paradigm for the management of one funcional entity of Message Handlig System (MHS) X.400, the Message Transfer Agent (MTA). The MHS X.400 is the eletronic mail application for OSI environment. The eletronic mail is one of most popular network application and it has been indicated to be the base for other applications. The conceptual definition of management paradigm was based in OSI management framework, but the actual prototype implementation uses the SNMP protocol from Internet framework. The definition and elicitation of management requirements for MTA management were based on organization, function and information models defined by ISO. The organization model defines the hierarchy between the management entities, i.e., the hierarchy between agents and managers. The organization model describes the MTA management requirements by the functional areas: fault management, configuration managemet, accounting management, performance management and security managent. The information model defines the MIB, i.e., the managed objects. The conceptual model validation was realized throught prototype implementation. For this validation some softwares were used such as ISO Environment Development (ISODE) and PP that are sharewares commonly used in academic environments and SunNet Manager (SNM) that is a comercial software. This implementation prototype was helpful to apply the network management concepts and to get knowhow about real network managemnt softwares utilization and integration.

<p>SMTP, the current protocol for sending electronic mail (e-mail) over the Internet, has for many years suffered from several problems and limitations. When it was designed, well over twenty years ago, the requirements for e-mail were very different from those of today. A message was a text message in English, and both user and machine were explicitly named in the address. The protocol was not designed to transfer other types of messages, and no mechanism was included to verify the identity of the sender.</p><p>In order to solve these shortcomings, a new e-mail protocol needs to be defined. This report specifies a basis for what such a protocol may look like. The protocol has been designed to be easy to modify and expand, as well as to benefit from more recent ideas and technology. Binary message content is transferred without conversion, sender addresses are verified, and the address format is flexible. Along with the specification of the protocol, a sample implementation has been provided.</p>

Leistungsangebot der Gruppe Technik Kursangebote Hinweise zum Konfigurieren und Beschaffen von PC's X.400-Relay Termine Wir sind umgezogen!

SMTP, the current protocol for sending electronic mail (e-mail) over the Internet, has for many years suffered from several problems and limitations. When it was designed, well over twenty years ago, the requirements for e-mail were very different from those of today. A message was a text message in English, and both user and machine were explicitly named in the address. The protocol was not designed to transfer other types of messages, and no mechanism was included to verify the identity of the sender. In order to solve these shortcomings, a new e-mail protocol needs to be defined. This report specifies a basis for what such a protocol may look like. The protocol has been designed to be easy to modify and expand, as well as to benefit from more recent ideas and technology. Binary message content is transferred without conversion, sender addresses are verified, and the address format is flexible. Along with the specification of the protocol, a sample implementation has been provided.

Leistungsangebot der Gruppe Technik Kursangebote Hinweise zum Konfigurieren und Beschaffen von PC's X.400-Relay Termine Wir sind umgezogen!

The purpose of the research is to propose and evaluate a methodology for implementing EDI to assist organisations in reaping the anticipated benefits. The research involved the systematic analysis of the state of the art of EDI and paradigms of methodologies, to define a model for the EDI implementation methodology, and to define criteria for evaluating such a model. The methodology was developed and modelled utilising the software process model, as adopted by Boehm (1988) and later duPlessis and van der Walt (1992), as a framework. Next a synthesis of the assimilated knowledge and brainstorming of project teams involved in EDI pilot projects, was used to systematically develop an EDI implementation methodology. The methodology was evaluated by utilising it in the implementation of EDI between two organisations, Computer Equipment Brokers (PTY) and Marksec (PTY). It was concluded that the methodology was efficient for implementing EDI. / Computing / M. Sc. (Information Systems)

The purpose of the research is to propose and evaluate a methodology for implementing EDI to assist organisations in reaping the anticipated benefits. The research involved the systematic analysis of the state of the art of EDI and paradigms of methodologies, to define a model for the EDI implementation methodology, and to define criteria for evaluating such a model. The methodology was developed and modelled utilising the software process model, as adopted by Boehm (1988) and later duPlessis and van der Walt (1992), as a framework. Next a synthesis of the assimilated knowledge and brainstorming of project teams involved in EDI pilot projects, was used to systematically develop an EDI implementation methodology. The methodology was evaluated by utilising it in the implementation of EDI between two organisations, Computer Equipment Brokers (PTY) and Marksec (PTY). It was concluded that the methodology was efficient for implementing EDI. / Computing / M. Sc. (Information Systems)