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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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Extension of the Monitoring Probe with Wi-Fi Support
Findra, Michal ; Tisovčík, Peter (referee) ; Orsák, Michal (advisor)
The purpose of this work is to study Wi-Fi networks and their security and to create an extension for network probe, which is able to catch and analyze Wi-Fi traffic developed by The Accelerated Network Technologies (ANT) research group on FIT BUT. Study of software flexprobe components are described with proposal of wireless extension. Wi-Fi standards are described with their flaws and tools to crack Wi-Fi security with ability to intercept traffic on specific network. Implementation of wireless extension with testing is described in the last part of this thesis.
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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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Anonymization of users when collecting network traffic
Hamár, Lukáš ; Blažek, Petr (referee) ; Sikora, Marek (advisor)
This thesis deals with anonymization of data, which could lead to disclosure of the identity of end users in network traffic. Work describes algorithms by which individual data parts are anonymized and also tools which use these techniques for network traffic anonymization. The next part of the thesis describes construction of a laboratory network, in which is the network traffic captured, containing pcap and NetFlow data. With using of the captured data, the anonymization tools are tested and the results are compared. In the last part of the thesis is created graphical interface for one of the tested anonymization softwares.
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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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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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Information Fusion for Classification of Network Devices
Sedláček, Ondřej ; Tisovčík, Peter (referee) ; Žádník, Martin (advisor)
This work is focused on solving information fusion when dealing with multiple data sources in computer network monitoring. A solution built on the concept of classification rules configured by experts is presented. Configuration is simplified using a designated configuration language interpreted by the solution. The classification rules enable coverage of diverse types of data. The result is given as a label from specified taxonomy. Using a taxonomy maintains the different levels of detail between the data sources, even in the output label. The solution also uses the Dempster-Schafer theory for merging labels from different sources into a single output label. Results of experiments show that information fusion in this context does increase the accuracy of device classification. A process of rule optimization was developed based on testing and experiments with a dataset from a real network. The accuracy was increased by 19 % compared to the original solution using this process.
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SNMP Agent for IoT Devices
Polishchuk, Kateryna ; Grégr, Matěj (referee) ; Matoušek, Petr (advisor)
The aim of this work is to create a SNMP agent for monitoring IoT devices. Because most IoT devices do not support SNMP, we want to implement a SNMP agent that will collect device information and write the collected data to the values of the variables in the MIB. The procedure will be demonstrated on D-Link devices, as a door sensor and signaling device that communicate with the adapter via the Z-Wave radio signal.
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Analysis of Security Incidents from Network Traffic
Serečun, Viliam ; Grégr, Matěj (referee) ; Ryšavý, Ondřej (advisor)
Analýza bezpečnostních incidentů se stala velmi důležitým a zajímavým oborem počítačové vědy. Monitorovací nástroje a techniky pomáhají při detekci a prevenci proti tímto škodlivým aktivitám. Tento dokument opisuje počítačové útoky a jejich klasifikaci. Také jsou tady opsaný některé monitorovací nástroje jako Intrusion Detection System nebo NetFlow protokol a jeho monitorovací software. Tento dokument také opisuje konfiguraci experimentální topologie a prezentuje několik experimentů škodlivých aktivit, které byly detailně kontrolovány těmito monitorovacími nástroji.
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System for monitoring of devices connected to the computer network
Macků, Jan ; Petyovský, Petr (referee) ; Macho, Tomáš (advisor)
The bachelor thesis deals with the design and implementation of the web application for monitoring of the network devices. The thesis describes the design and functionality of the web interface that is used for fast and simple monitoring of the connected devices in computer network. The work also addresses the security of the web interface and the design of database structures. Further, the work describes briefly the characteristics of SNMP protocol and other important tools for obtaining the monitored data. The API of the web application is described in detail, including hints for building stand alone applications based on it. Work also contains a brief user guide for end users.
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