Artigos de Conferência, Publicação

A Model of Signaling for Establishing of LSPs for Multicast Communication over GMPLS Networks

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Label switching, which in IP networks is exemplified by MPLS and its extensions MPLambdaS and GMPLS, appears as one of the best alternatives to offer a reliable and flexible control plane for WDM networks, since it allows the integration of the IP Protocol with WDM technology, when lambdas are associated with labels, implements powerful traffic-engineering mechanisms, and provides several alternative schemes for fault-tolerance, as well as support for quality of service (QoS). However, almost all the definitions and standardizations for MPLS are restricted to unicast communication, leaving support for multicast communication for future work. In the specific case of the triggering problem for LSPs (Label Switched Paths), there is still no consensus about the best strategy for multicast communication. This paper proposes an algorithm for traffic-driven triggering of LSPs, based on MFCs (Multicast Forwarding Caches), and has the advantage of being a schema which is compatible with several multicast routing protocols. To validate the proposed algorithm we carry out simulation studies using the NS-2 (Network Simulator) simulation platform.

Artigos de Conferência, Publicação

Log analysis based mechanism fornetwork security incidents identification

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The increasing use and importance of networks in today’s economic and social context have also led to a rise in the number of malicious activities that violate privacy and security policies of institutional networks. There are several approaches aimed at detecting such activities, such as the use of intrusion detection systems. The goal of this paper is to present an alternative approach to detecting malicious activities based on querying and correlating the events recorded in system logs. The purpose of this approach is to identify the hosts responsible for these malicious activities. Experiments conducted at the Brazilian National Research and Educational Network’s Point of Presence in the State of Pará have shown that this proposal can accurately detect the hosts responsible for malicious activities while requiring low computational resources.