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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
Dufek, Milan ; Straka, Martin (referee) ; Tobola, Jiří (advisor)
This thesis deals with gathering and analysis of statistic data about network traffic, it also deals with preserving and displaying such a data. The goal of this thesis is simple and quick user interface in web portal. The source of the statistic data is NetFlow technology. We use NfDump tool for reading the gathered data. Implementation is done in PHP, XHTML, CSS and JavaScript. SQLite Database is used for preserving the data.
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Information System for Fair User Policy Management
Vykydal, Oldřich ; Žádník, Martin (referee) ; Tobola, Jiří (advisor)
Main goal of this bachelor's thesis is to design and implement information system for the management of Fair User Policy, or abbreviated as FUP. This whole project is based on the use of NetFlow technology to monitor the computer network through the monitoring of network flows. The resulting information system will enable network administrators to set limits to customers in the volume of transferred data and subsequent monitoring of their compliance. If the customer is in breach of these limits, the information system will allow the penalty. The system will also record some statistics on network traffic.
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Netflow Data Application Interface
Šoltés, Miroslav ; Matoušek, Petr (referee) ; Podermański, Tomáš (advisor)
This diploma thesis deals with design and implementation of NetFlow data manipulation tool. It contains analysis of IP Flow network monitoring, description of nfdump tool and format of Netflow v9 records saved by nfdump. The focus of this application interface lies in effective manipulation with NetFlow records.
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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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Interactive Web Interface for IP Flow Data
Salač, Radek ; Grégr, Matěj (referee) ; Matoušek, Petr (advisor)
This thesis describes development of application for analyzing IP flow data. The author conducts relative comparison of already existing protocols and tools and studies theirs pro's and con's. Based on this comparison and features requested by users, author develops his own application primarly focused on interactive and user-friendly interface for working with IP flow data.
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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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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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Validation of Network Parameters Based on Network Monitoring
Martínek, Radim ; Veselý, Vladimír (referee) ; Žádník, Martin (advisor)
The Master's Thesis presents a theoretical introduction, familiarization with the issue and a implementation for a solution of a "network parameter validation" tool, which is founded on principle of network traffic monitoring. Firstly, the current development of computer network setup is analyzed with its limitations. This is an initial point for an introduction of a new approach for implementation and verification of required network setting, which uses techniques of verification, simulation and validation. After the introduction into the context, validation techniques are specifically examined. The Thesis main contribution lies in the capacity to determine appropriate parameters, which can be used for validation and also for implementation of the tool, which ensures validation process. The network traffic, which characterizes the behavior of the network, is collected by NetFlow technology, which generates network flows. These flows are consequently used by the designed tool used for validation of required network parameters. This process overall verifies whether the main computer network requirements have been met or not.
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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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