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Geolocation in Internet using latency measurements
Harth, Petr ; Balej, Jiří (referee) ; Komosný, Dan (advisor)
This diploma thesis is concerned with practical realization of CBG (Constraint-based Geolocation) algorithm, which is one of the IP (Internet Protocol) geolocation technique. IP geolocation determines the localization of a computer workstation location on the basis of on its IP address. The factors causing delays in data transfer are discussed first, followed by discussion of the issue of measuring these delays. The detailed explanation of IP geolocation follows where its contexts as well as the active geolocation techniques (techniques based on delay measurement mentioned above) are described. After that a brief description of PlanetLab experimental network, which was used for geolocation techniques measuring, is presented followed by a section explaining the creation of reference points and targets, which are another necessary prerequisite for practical realization of the method. Then the practical realization is explained in the form of CBGfinder program and its verification on the basis of artificial input data along with an actual example of IP geolocation of a point in the Internet are provided. Last but not least the measurement results of CBG algorithm are introduced, based on the analysis of Bestline parameters of one of the PlanetLab nodes measured in the period of one month, followed by a discussion of the inaccuracy of geological position and the computation speed. The cumulative distribution function as well as the kernel density estimation are also described. Final part of the thesis consists of discussion on measured results compared to results of other geological techniques results implemented by colleagues of the author of this diploma thesis. The results are compared on the basis of average inaccuracy of geological position estimations and its median, computation time, cumulative distribution function and kernel density estimation are also taken into regard.
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Sketchup visualization of statrionery robots
Iutkin, Egor ; Lázna, Tomáš (referee) ; Burian, František (advisor)
Práce je zaměřena na vytvoření jednoduchého vizualizačního nástroje pro robotický manipulátor v softwaru SketchUp. Trojrozměrné rozhraní softwaru se používá k vizualizaci pohybu virtuálního robota pod kontrolou externí aplikace (zpočátku pod kontrolou reálného robota), která využívá sadu protokolů TCP / IP ke sledování polohy robota. Komunikace s projektem ve programu probíhá pomocí SketchUp API rozhraní, které umožnují komunikovat s projektem prostřednictvím zdrojového kódu Ruby. Hodnoty úhlů jednotlivých robotický kloubů jsou interpretovány ve formě parametrický pohyb virtuálního robota. Aplikace klient-server-klient je vytvořena v C++, C# a Ruby pomocí síťových soketů. Sokety se používají k navázání TCP spojení v lokální síti. Plugin Ruby, který poskytuje komunikační rozhraní, v aplikaci se chová jako první klient. Vlastní aplikace C # funguje jako druhý klient, nazývaný „řídicí klient“, poskytuje uživatelské rozhraní pro konfiguraci připojení k serveru a nastavení jednotlivých úhlů kloubů virtuálního robota. Komunikaci mezi dvěma klienty zajišťuje C++ TCP server (konzolová aplikace). Server získává data z řídicího klienta a předává je na stranu Ruby.
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Laboratory Monitoring System
Bošeľa, Jaroslav ; Křepelka, Václav (referee) ; Škorpil, Vladislav (advisor)
This bachelor thesis deals with network monitoring solution for school laboratory network. Describes the laboratory network devices, their purpose and condition before applying configuration, it also contains a comparison of commercial supervision network systems and the choice of one that has been used. The essence of the thesis is focused onto SNMP protocol, its use in laboratory network monitoring. In the practical part of the thesis is created the system supervision configuration, which is applied into laboratory network and ensures the supervision and monitoring for whole laboratory network.
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Breath monitoring during motion therapy
Koťová, Markéta ; Bubník, Karel (referee) ; Kolářová, Jana (advisor)
This semestral thesis deals with continuous monitoring of pulmonary ventilation during the patients' theraphy and focuses especially on monitoring of their ventilation processes. It is necessarry to detect, monitor and differentiate abdominal and thoracic breathing during the theraphy. This thesis describes the very basic and common method, a spirometry. Next, an overview of more advanced state-of-the-art methods based on both, tactile and proximity principles is given. In addition to that, two recently developed methods by BUT are discussed as well -- a tactile-based measurement similar to blood pressure sensor and a proximity-based measurement method employing TOF cameras. The data acquired by these two methods are proccesed and examined in order to evaluate and justify their performance in a real application.
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Security of VoIP protocols
Novotný, František ; Číka, Petr (referee) ; Krajsa, Ondřej (advisor)
This bachelor dissertation deals with the VoIP (Voice over Internet Protocol) safety. The most used transport and signal protocols employing this technology are presented first. Two extended protocols, SIP (Session Initiation Protocol) and IAX (Inter-Asterisk eXchange Protocol), as well as open source Asterisk, which is closely connected with these protocols, are shown in detail. After that, methods, attacks and threats able to assure secure transfer in the use of VoIP among users are described. Afterwards the practical part of this essay, divided into two parts, is presented. In the first part, a passive attack in the form of tapping is demonstrated, and in the second, active attacks are described which take the form of forced cancellations and forwarded calls between two communicating users. With both attacks, safety measures that could effectively prevent against their potential attacking are proposed. In the closing part, the VoIP safety is evaluated for securing a quality connection between users communicating through it.
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Geolocation of Internet nodes based on communication latency
Horák, Michael ; Balej, Jiří (referee) ; Komosný, Dan (advisor)
This thesis covers the topic of determination of geographical location of a host in internet network while utilizing measurement of the end to end delay and implementation of Constraint-Based Geolocation. Gradually I go through issue of the delay in computer networks and ways how to measure it. Next chapter describes a few ways to geolocate host in internet network with emphasis on the CBG method. Another chapter is dedicated to describing a way to project spherical coordinates to the two dimensional space, which has been used in implementation of geolocation method. Chapter about implementation builds upon the facts given in previous chapters while functions of the program written in the JAVA programing language are being explained. Two similar geolocation methods were implemented. By comparing the results gained by implementation, new method of geolocation is proposed and devised. It combines properities of both previous methods. There are results of the implemented methods and their comparation to the one of the source documents used in creation of this thesis in summary section.
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Extraction of information from web pages
Caha, Tomáš ; Burget, Radim (referee) ; Komosný, Dan (advisor)
This thesis deals with the separation of information from websites of selected geolocation services. Methods of geographical location of network devices and amount of available data provided by chosen freely accessible geolocation databases. The data are summarized with focus on methods of obtaining information about IP addresses from APIs of particular databases. In the paper there are also presented ways used to develop the system for automatic estimation of geographic location of IP addresses specified in source file and process of comparing retrieved data with reference data. The system is created in Python and provides a simple way for verifying information about given IP addresses in five freely accessible databases. Furthermore, accuracy of the retrieved data is evaluated and five geolocation databases is compared.
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Wireless IP Camera With a Raspberry Pi
Sidor, Peter ; Botta, Miroslav (referee) ; Červenka, Vladimír (advisor)
This thesis deals with the developing of an additional module for Raspberry Pi and with optimization of the efficiency of powering the whole device. The thesis also deals with the acceleration of the Operating System which is used by the entire device. The first part of this work describes the principles of functioning of the sensors and DC/DC converters. The work focuses on the selection of proper components for this module. The Printed Circuit Boards of the selected DC/DC converters were created in the program Eagle for efficiency measuring. As for the next part, there was created a program for turning on and off the entire device. This part presents a description of the possibilities of accelerating the operating system for Raspberry Pi. The last part of the thesis focuses on design of the final operating system.
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Geolocation of Internet nodes using IP address analysis
Henek, Jan ; Balej, Jiří (referee) ; Komosný, Dan (advisor)
Tato práce se zabývá problematikou určování fyzické polohy pomocí rozboru IP adresy. Zkoumanou metodou geolokace je databáze Whois. Práce je rozdělena na teoretickou část – která obsahuje obecný popis geolokačních metod, práce se souřadnicemi a výpočtem vzdáleností na zemi, a na praktickou část – kde je popsán program využívající Whois k nalezení stanice. Na závěr jsou předloženy a komentovány výsledky měření přesnosti databáze Whois, a také porovnány s jinými metodami geolokace. Aplikace je přiložena na CD.
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Effective Network Anomaly Detection Using DNS Data
Fomiczew, Jiří ; Žádník, Martin (referee) ; Kováčik, Michal (advisor)
This thesis describes the design and implementation of system for effective detection of network anomaly using DNS data. Effective detection is accomplished by combination and cooperation of detectors and detection techniques. Flow data in NetFlow and IPFIX formats are used as input for detection. Also packets in pcap format can be used. Main focus is put on detection of DNS tunneling. Thesis also describes Domain Name System (DNS) and anomalies associated with DNS.
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