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Distributed Tool for Extraction of Information from Network Flows
Sedlák, Michal ; Grégr, Matěj (referee) ; Žádník, Martin (advisor)
This work deals with the extraction of information from flow records that are the result of network monitoring by the IPFIX system. The goal of the work is to design a tool that allows querying stored network flows created by the open-source collector IPFIXcol2. Querying is performed with the highest possible efficiency and performance in mind, which is achieved by using appropriate data structures and thread-level parallelization, as well as by using multiple machines.
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Information System for Fair User Policy Management
Horčička, Jakub ; Kaštovský, Petr (referee) ; Tobola, Jiří (advisor)
This bachelor thesis presents methods for monitoring network activity with an aim to Cisco Systems NetFlow technology. Following chapters describe implementation of an information system that uses this technology especially for making the stats about particular users and allows checking of rules and data limits determined in ofeered tarifes.
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Distributed Processing of IP flow Data
Krobot, Pavel ; Kořenek, Jan (referee) ; Žádník, Martin (advisor)
This thesis deals with the subject of distributed processing of IP flow. Main goal is to provide an implementation of a software collector which allows storing and processing huge amount of a network data in particular. There was studied an open-source implementation of a framework for the distributed processing of large data sets called Hadoop, which is based on MapReduce paradigm. There were made some experiments with this system which provided the comparison with the current systems and shown weaknesses of this framework. Based on this knowledge there was created a specification and scheme for an extension of current software collector within this work. In terms of the created scheme there was created an implementation of query framework for formed collector, which is considered as most critical in the field of distributed processing of IP flow data. Results of experiments with created implementation show significant performance growth and ability of linear scalability with some types of queries.
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Optimization of NetFlow Data Search Using nfdump
Kubovič, Martin ; Žádník, Martin (referee) ; Bartoš, Václav (advisor)
This bachelor thesis deals with optimization of NetFlow data search using the nfdump tool. This thesis describes NetFlow protocol and tool nfdump and proposes the solution using data structure Bloom filter. The main goal was to optimize data storage and processing in order to be able to search the huge amounts of collected data and get results very quickly. The outcome of this thesis is the optimized tool that network administrators can use to search these data and significantly accelerate monitoring and analyzing network.
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Network Traffic Visualization
Matoušek, Martin ; Bartoš, Václav (referee) ; Kováčik, Michal (advisor)
Bachelor thesis deals with visualization of network traffic by NetFlow data. In the theoretical part describes NetFlow technology thet is used for monitoring of computer network . Then I introduce theory of graph layouts . Purpose of the thesis is to crate tool for visualization data.
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IP Flow Filter
Štoffa, Imrich ; Krobot, Pavel (referee) ; Wrona, Jan (advisor)
This thesis is focused on unification of filtering languages used by IP flow collecting program and library for their analysis. At the moment these implementations use different filtering modules and file formats. Because of this, inconsistencies in results arise and as a response to this, creation of one filtering module was proposed as part of effort to better integrate collection and analysis of IP flows using these programs. The one filtering module aims to provide one implementation and support for popular filtering language for use in the programs. Thesis contains theoretical introduction to flow monitoring in networks, describes algorithms useful for evaluation of conditions on flow records and packets. The core of authors work is design and implementation of the filtering module and its wrappers for the collector and analysis library. Results of performance tests and evaluation of features can be found in the thesis's conclusion.
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Web Portal for Network Traffic Reporting
Zapletal, Petr ; Straka, Martin (referee) ; Tobola, Jiří (advisor)
This thesis deals with the design and implementation of web portal with reports about network traffic. This system is designed for easy network monitoring with transparent charts a tables. To obtain statistics from network traffic, NetFlow technology, which is the key part of system, is used. Portal is platform independent and is built around HTML and PHP technologies. Portal also allows export proccessed data through periodic email service or files in PDF format.
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Protecting Local Network Using NetFlow
Hanousek, Vít ; Polčák, Libor (referee) ; Matoušek, Petr (advisor)
This bachelor's thesis deals with the use of NetFlow data for monitoring local networks. There is an analysis of the best known threads for a local network in the first part of the thesis. Detection algorithms based on signature NetFlow detection were implemented for the chosen threads. Four plugins for an open-source application NfSen are outputs of this thesis. These plugins detects the following threads: vertical and horizontal scans, dictionary based attacks on SSH protocol, spam machines.
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Web Portal for Network Traffic Reporting
Krebs, Lukáš ; Straka, Martin (referee) ; Tobola, Jiří (advisor)
The thesis deals with creating a web portal for generating statistics about the network traffic. There is presented the NetFlow technology, which is used in this thesis. Then there is described tho whole development process from analysis, design and implementation of the system to its testing. The whole program is created in languages XHTML, CSS, PHP and uses a MySQL database for a data storage. For a data mining is used NfDump.
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Web Portal for Network Traffic Reporting
Lízal, Miroslav ; Žádník, Martin (referee) ; Tobola, Jiří (advisor)
This thesis focuses on development of a web portal, which provides information about network traffic. It describes available technologies, which can be used for the network monitoring. It puts emphasis especially on NeTFlow. This paper also descirebs the whole development cycle from analysis to implementation and testing. The outcome of this work is a online system, based on PHP language and PostgreSQL database, which creates reports on the network traffic and makes them accessible via WWW. It is also able to save these reports to a PDF file.
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