No abstract

A utilização de mais de uma estação de gerenciamento, diferenciadas de acordo com as cinco áreas funcionais de gerência definidas pela ISO (falhas, configuração, contabilização, desempenho e segurança), destaca-se como uma ótima solução para gerência de redes complexas de telecomunicações (OSI). Neste contexto, este artigo pesquisa a possibilidade do uso desta técnica de gerenciamento em ambientes SNMP, atualmente inviabilizada devido a ausência de uma ferramenta nativa que possibilite filtrar relatórios de eventos para determinação de destinatários. Um protótipo foi desenvolvido para exercer este papel de filtro de relatórios de eventos (Traps/Informs), de acordo com as especificações constantes na norma X-734 [6] para objetos discriminadores de repasse de eventos em ambientes de gerencia OSI.

In the latest years, the management requirements for computer networks have been demanding that management platforms must be built according to the present technological advances, and also according to the large capability and variety of the available elements in these environments. In this paper it is proposed a multithreaded infrastructure for the managed objects implementation in agents of a network management platform, which has been implemented following the OSI/ISO management model [l].

This paper presents a proposal for the session layer introduction into the TCP/IP architecture, generating an extended model able to respond to actual and future application requirements. The main aspects of the proposed model as well as the advantages of its utilization are discussed. Considerations on the necessary efforts in order to perform the adaptations are also made.

This paper proposes the use of Allomorphism for the access control service in OSI management environment, with no Access Control Function implementation (IS010164-9, 1990), which is responsible for this service. The Allomorphism is a powerful SMI resource that makes the OSI Model very strong and flexible. This strategy reduces the overhead introduced by the access control function on OSI management systems without expose the management to arbitrary use of its resources. The Allomorphism allows to define different access views to the management resources according to security requirements. In this context, this work presents the security requirements in networks management systems, the OSI Access Control Function Model and its disadvantages, the idea of Allomorphism and, finally, how to implement it to access control.