Results of the CEO Project - WWW Management

This report contains the result of a ‘proof of concept’ study that was performed by the CTIT of the University of Twente, together with ESYS Limited (Guildford, UK) for the Institute of Remote Sensing Applications of the Joint Research Centre (JRC) of the EC (Ispra, Italy). The study is part of the ‘Centre of Earth Observation’ (CEO) programme. The subject of the study was the design and implementation of tools that allow status and utilisation monitoring of networks and distributed information servers. In the specific case of the CEO programme, these information servers are accessible via the WWW and contain large amounts of earth observation data (e.g. satellite pictures). The work division within the project was that ESYS investigated the management applications, which had to run on top of HP-Openview, and the CTIT designed and implemented the management agents. These agents had to include the following Management Information Bases (MIBs): • A HTTP-MIB, with detailed information concerning the WWW document transfer protocol. • A Retrieval Service (RS) MIB, with high level information concerning the WWW document transfer service. • An Information Store (IS) MIB, with information concerning the WWW server and the documents provided by that server. The specifications of these MIBs were presented to the IETF and provided a good starting point for subsequent standardization activities. The agents were implemented as sub-agents of the EMANATE extensible agent package and are currently being tested in a number of field trials

IP Network Management Platforms Before the Web

In this paper, we analyze the characteristics and shortcomings of IP network management platforms before the arrival of Web technologies. In the first part, we give a brief history of IP network management, and summarize the limitations of traditional (i.e., pre-Web and SNMP-based) management platforms. We recall the initial objectives of open network management. We then explain how the early vision of generic management was changed by the industry`s natural inclination for market segmentation, and how the market of IP networks evolved from generic to vendor-specific equipment, management GUIs and MIBs. In the second part, we propose a simple model of traditional IP network management platforms, against which new Web-based management solutions can be compared. We introduce the three core functions of such platforms (network monitoring, data collection, and event handling), distinguish regular management from ad hoc management, and explain how SNMP`s polling model maps onto these functions

Administração e gerência de redes de computadores

With the computers networks growing in complexity, the network monitoring tools usage becomes more and more necessary. This monograph presents case studies where the importance of using network monitoring tools, like Nagios, Cacti and BigBrother, is shown in order to avoid excessive time and resources demand on managing networks. Enhancing substantially the administrator work quality standard, allowing him having a precise and centralized vision of all important network elements.Com a crescente complexidade das redes de computadores, a utilização de sistemas de gerenciamento de redes torna-se cada vez mais indispensável. Esta monografia apresenta estudos de caso onde é mostrada a importância da utilização de ferramentas de gerenciamento de redes, como o Nagios, o Cacti e o BigBrother, a fim de evitar o consumo excessivo de tempo e recursos para esta tarefa, elevando significativamente o padrão de qualidade do trabalho do administrador, permitindo-o ter uma visão precisa e centralizada de todos os elementos importantes da rede

Implementation of service functions for work with MIB database in simulation environment OPNET Modeler

Předmětem této bakalářské práce je implementace obslužných funkcí pro práci s databází MIB. Databáze MIB je systémová databáze, která slouží k uchovávání řídících informací v síťových uzlech. První kapitola slouží jako lehký úvod do řízení počítačových sítí. Druhá kapitola popisuje základní rysy protokolu SNMP. Protokol SNMP je standardizovaný aplikační protokol, který slouží k přenosu řídících informací z a do systémové databáze MIB. Protokol je založen na konceptu manager – agent, kdy aktivní je až na výjimky vždy manager, který se dotazuje agenta na hodnoty konkrétních položek. Strukturou a standardy pro systémové databáze MIB se zabývá další kapitola. Popisuje základní větvení mezi správními organizacemi. Hlavní část práce je věnována návrhu a implementaci obslužných funkcí databáze MIB. V této kapitole jsou identifikovány hlavní požadavky na databázi MIB z hlediska spolupráce s protokolem SNMP. Tyto procesy jsou dále zapracovány do experimentální implementace databáze MIB. Implementace je napsána v jazyce C++. Z návrhu vznikl hlavičkový soubor tříd a podpůrných funkcí, jež implementují základní mechanizmy databáze MIB a jejích metod pro obsluhu této databáze. Hlavičkový soubor obsahuje též několik procesů pro ulehčení spolupráce databáze MIB s aplikačním protokolem SNMP. Závěrečná kapitola ukazuje používání navržených tříd. Vytvořený program je vybaven grafickým rozhranním, které využívá funkcí určených pro místní přístup. Mezi další ukázané funkce program patří velmi jednoduchý modul pro komunikaci s databází prostřednictvím zpráv SNMP.Implementation of service for work with MIB database is subjeckt the bachelor’s thesis. MIB database is system database which is instrumental for storage of control informations in network elements. A first chapter is instrumental like a introduction to the control computer networks. A second chapter describes the basic features of protocol SNMP. The protocol SNMP is a standardized application protocol which uses for a transmission control informacions from and to the system database MIB. The protocol is based on a draft manager-agent when the manager is mostly active who enquire of the agent for the values of concrete items. A next chapter deals with a structure and standards for the MIB database. It describes a basic enbranchment among the administrative organizations. A main part of working is devoted to a proposal and a implementation of servece functions MIB database. The main requirements for the MIB database in light of a cooperation with the protocol SNMP are identified in this chapter. These processes are trained-in to the experiment implementation of MIB database. The implementation is written in C++. A header file of the classes and supportive functions who implement basic mechanisms of MIB database and its methods for a tender the database created from the proposal. The header file contains the several processes for an easement of cooperation MIB database with the application protocol SNMP, too. A final chapter shows the using of designed classes. The created programe is equipped with a graphics interface who uses the functions for a local access. Very easy modul for the comunication with the database through the messages of SNMP is among next shown functions in the programe.

Toward the PSTN/Internet Inter-Networking--Pre-PINT Implementations

This document contains the information relevant to the development of the inter-networking interfaces underway in the Public Switched Telephone Network (PSTN)/Internet Inter-Networking (PINT) Working Group. It addresses technologies, architectures, and several (but by no means all) existing pre-PINT implementations of the arrangements through which Internet applications can request and enrich PSTN telecommunications services. The common denominator of the enriched services (a.k.a. PINT services) is that they combine the Internet and PSTN services in such a way that the Internet is used for non-voice interactions, while the voice (and fax) are carried entirely over the PSTN. One key observation is that the pre-PINT implementations, being developed independently, do not inter-operate. It is a task of the PINT Working Group to define the inter-networking interfaces that will support inter-operation of the future implementations of PINT services

Push vs. Pull in Web-Based Network Management

In this paper, we show how Web technologies can be used effectively to (i) address some of the deficiencies of traditional IP network management platforms, and (ii) render these expensive platforms redundant. We build on the concept of embedded management application, proposed by Wellens and Auerbach, and present two models of network management application designs that rely on Web technologies. First, the pull model is based on the request/response paradigm. It is typically used to perform data polling. Several commercial management platforms already use Web technologies that rely on this model to provide for ad hoc management; we demonstrate how to extend this to regular management. Second, the push model is a novel approach which relies on the publish/subscribe/distribute paradigm. It is better suited to regular management than the pull model, and allows administrators to conserve network bandwidth as well as CPU time on the management station. It can be seen as a generalization of the paradigm commonly used for notification delivery. Finally, we introduce the concept of the collapsed network management platform, where these two models coexist

Network anomaly detection using management information base (MIB) network traffic variables

In this dissertation, a hierarchical, multi-tier, multiple-observation-window, network anomaly detection system (NADS) is introduced, namely, the MIB Anomaly Detection (MAD) system, which is capable of detecting and diagnosing network anomalies (including network faults and Denial of Service computer network attacks) proactively and adaptively. The MAD system utilizes statistical models and neural network classifier to detect network anomalies through monitoring the subtle changes of network traffic patterns. The process of measuring network traffic pattern is achieved by monitoring the Management Information Base (Mifi) II variables, supplied by the Simple Network Management Protocol (SNMP) LI. The MAD system then converted each monitored Mifi variable values, collected during each observation window, into a Probability Density Function (PDF), processed them statistically, combined intelligently the result for each individual variable and derived the final decision. The MAD system has a distributed, hierarchical, multi-tier architecture, based on which it could provide the health status of each network individual element. The inter-tier communication requires low network bandwidth, thus, making it possibly utilization on capacity challenged wireless as well as wired networks. Efficiently and accurately modeling network traffic behavior is essential for building NADS. In this work, a novel approach to statistically model network traffic measurements with high variability is introduced, that is, dividing the network traffic measurements into three different frequency segments and modeling the data in each frequency segment separately. Also in this dissertation, a new network traffic statistical model, i.e., the one-dimension hyperbolic distribution, is introduced