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HTTP Analyzer with Web User Interface
Rozsnyó, Tomáš ; Žádník, Martin (referee) ; Tobola, Jiří (advisor)
This work provides a description of the theoretical and implementation part of HTTP analyzer with a web interface. HTTP Analyzer processes and saves captured HTTP packets. HTTP Analyzer includes a client, whose task is to save analyzed logs to PostgreSQL database. Web interface provides the management of the PostgreSQL database and offers capability to readily and clearly see the statistics generated from the stored logs. Database management involves the manipulation of stored logs and administration of users accessing the web interface.
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Production of the golf club head
Žádník, Martin ; Kaněra, Miloš (referee) ; Jelínek, Radim (advisor)
Focus of this thesis is on choosing of a suitable production process of golf club head and its subsequent production. Investment casting was chosen as a process of production. Model, which is usually wax, was made on FDM 3D printer from PLA material. The casting material was chosen Maraging 200 steel. Two different putters were created and a short survey was conducted. Based on result of the survey the third model was created.
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Widgets for a Mobile Application of Intelligent Home Control
Mlynarič, Tomáš ; Korček, Pavol (referee) ; Žádník, Martin (advisor)
This thesis deals with development of widgets designed for intelligent home control in the environment of Android operation system. The intelligent home control is a framework developed at FIT BUT. The thesis introduces the framework and explains principals of developing widgets. The practical part discusses design and implementation of the specific widgets. The implementation is evaluated and the results are discussed. The concluding section provides summary and suggests future improvements.
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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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Detection of Cryptocurrency Miners Based on IP Flow Analysis
Šabík, Erik ; Krobot, Pavel (referee) ; Žádník, Martin (advisor)
This master’s thesis describes the general information about cryptocurrencies, what principles are used in the process of creation of new coins and why mining cryptocurrencies can be malicious. Further, it discusses what is an IP flow, and how to monitor networks by monitoring network traffic using IP flows. It describes the Nemea framework that is used to build comprehensive system for detecting malicious traffic. It explains how the network data with communications of the cryptocurrencies mining process were obtained and then provides an analysis of this data. Based on this analysis a proposal is created for methods capable of detecting mining cryptocurrencies by using IP flows records. Finally, proposed detection method was evaluated on various networks and the results are further described.
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Gateway for Smart Home
Čechmánek, Martin ; Žádník, Martin (referee) ; Novotný, Tomáš (advisor)
In area of Smart-home control, there are requirements for miniaturisation, security and advanced control logic of individual member of system at present. One of the challenges is the way of data collecting from terminal nodes and data processing, including their distribution to the others nodes of Smart-home. The goal of this thesis is to design and to produce Smart-home control node, which will be a gateway between sensoric net and database and will be developed and produced on embedded system with speci c HW boards. Functionality of this gateway should include error states, e.g. should cache sensor messages when the connection between gateway and server interrupts, or take care about time synchronising. The thesis describes theoretical side of gateway design and also practical side of programming and producing SW for the gateway in Smart-home system.
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Optimization of network flow monitoring
Žádník, Martin ; Lhotka,, Ladislav (referee) ; Matoušek, Radomil (referee) ; Sekanina, Lukáš (advisor)
The thesis deals with optimization of network flow monitoring. Flow-based network traffic processing, that is, processing packets based on some state information associated to the flows which the packets belong to, is a key enabler for a variety of network services and applications. The number of simultaneous flows increases with the growing number of new services and applications. It has become a challenge to keep a state per each flow in a network device processing high speed traffic. A flow table, a structure with flow states, must be stored in a memory hierarchy. The memory closest to the processing is known as a flow cache. Flow cache management plays an important role in terms of its effective utilization, which affects the performance of the whole system. This thesis focuses on an automated design of cache replacement policy optimized to a deployment on particular networks. A genetic algorithm is proposed to automate this process. The genetic algorithm generates and evaluates evolved replacement policies by a simulation on obtained traffic traces. The proposed algorithm is evaluated by designing replacement policies for two variations of the cache management problem. The first variation is an evolution of the replacement policy with an overall low number of state evictions from the flow cache. The second variation represents an evolution of the replacement policy with a low number of evictions belonging to large flows only. Optimized replacement policies for both variations are found while experimenting with various encoding of the replacement policy and genetic operators. The newly evolved replacement policies achieve better results than other tested policies. The evolved replacement policy lowers the overall amount of evictions by ten percent in comparison with the best compared policy. The evolved replacement policy focusing on large flows lowers the amount of their evictions two times. Moreover, no eviction occurs for most of the large flows (over 90%). The evolved replacement policy offers better resilience against flooding the flow cache with large amount of short flows which are typical side effects of scanning or distributed denial of service activities. An extension of the replacement policy is also proposed. The extension complements the replacement policy with an additional information extracted from packet headers. The results show further decrease in the number of evictions when the extension is used.
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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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Network Protocol Analyzer
Takács, Tamás ; Žádník, Martin (referee) ; Tobola, Jiří (advisor)
Bachelor's thesis describes an implementation of a network analyzer with an easy graphical web interface. Network Analyzer captures network communication and allows the detailed analysis. Its main task is to monitor data flows and identify protocols, which are situated on application-layer model TCP / IP. Thesis describes two types of possible identification of application protocols, which are based on the port number and the payload content TCP packet / UDP datagram. Web interface provides an overview of the output values of the network analyzer.
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Framework for Testing of Mobile Application Implementing Intelligent Home Control
Kůrová, Martina ; Korček, Pavol (referee) ; Žádník, Martin (advisor)
This thesis deals with testing of mobile application implementing inteligent home remote control developed under the project Internet of Things at FIT BUT. The main goal is to create sets of automated test scenarios to verify correct functionality of the application with the intention to increase its stability. The first part presents inteligent home architecture, further continues a theoretical overview of operating system Android and testing of mobile applications with the Android operating system. Other parts are devoted to describing an implementation of the proposed method for testing of the application. Conclusion stated assess the quality of developed tests and evaluation of their results.
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