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VoIP Traffic Monitoring and Management in OnePK Enabled Networks
Antolík, Dávid ; Matoušek, Petr (referee) ; Ryšavý, Ondřej (advisor)
The main goal of this master's thesis is to apprise of principles of Cisco One Platform Kit based on software defined networks and with monitoring techniques in that type of networks. The focus is concentrated on monitoring the quality of Voice over IP communication. Next part of this thesis is a proposal and implementation of the extensible monitoring environment OneMon on the Cisco One Platform Kit. It is possible to extend OneMon environment using specific analyzers to monitor various types of network traffic. The part of this master's thesis is also implementation of VoIP traffic analyzer for SIP and RTP protocols. This analyzer provides information about phone calls and their quality in a monitored segment of a computer network.
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Detection of Dictionary Attacks on Network Services Using IP Flow Analysis
Činčala, Martin ; Grégr, Matěj (referee) ; Matoušek, Petr (advisor)
Existing research suggests that it is possible to detect dictionary attacks using IP flows. This type of detection was successfully implemented for SSH, LDAP and RDP protocols. To determine whether it is possible to use the same methods of detection for e-mail protocols virtual test environment was created. I deduced the characteristics of attacks in flows from the data, which I gained from this virtual environment. Than I chose the statistical value that separates the attacks from legitimate traffic. Variance of specific flow parameters was chosen as main characteristic of attacks. IP addresses with flows that have small variance of chosen parameters and high frequency of packet arrival are considered untrustworthy. Variance is calculated from IP history to rule out false positives. The IP history of legitimate user contains variation of flows which prevents marking this IP address as dangerous. On the basis of this principal the script, which detects the attacks from the nfdump output, was created. The success of detection of the attacks was tested on classificated data from the real environment. The results of tests showed, that with good configuration of marginal values the percentage of detected attacks is high and there are no false positives. Detection is not limited only on mail protocols. With regard to universal design, the script is able to detect dictionary attacks on SSH, LDAP, SIP, RDP, SQL, telnet and some other attacks.
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Session Monitoring and Accounting in IMS Networks
Karpíšek, Filip ; Ryšavý, Ondřej (referee) ; Matoušek, Petr (advisor)
This thesis describes protocols used in IP Multimedia Subsystem (IMS) networks. Freely available implementations of IMS system are described. The main goal is to describe design and implementation of a tool for analyzing communication between users and IMS system. The tool seeks and decodes signaling messages. These messages are analyzed for information about sessions which are necessary for session monitoring and accounting. Final gathered information are exported in a form of extended NetFlow/IPFIX records. We used open-source Open IMS Core implementation for building IMS network and creating test data. As endpoints we used another open-source application for Android OS called IMSDroid.
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Framework for DNS Server Testing
Novák, Martin ; Grégr, Matěj (referee) ; Matoušek, Petr (advisor)
This thesis deals with the modifications of the framework designed for DNS servers testing. Framework is developed by NIC.CZ association and is used primarily for testing the DNS server Knot DNS. The aim of this work are modifications of the framework that will allow simpler testing with this framework, such as: support for multiple implementations of DNS servers, parallel testing, components dummy server and box-in-the-middle, division into multiple components and overall modification of the existing framework. Introduction of thesis is dedicated to the authoritative DNS servers and to the foundations of testing. The remaining part of the thesis deals with the state of the existing framework and the state and testing of modified framework.
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Evaluating the effectiveness of complex protection measures in cadastral area Jerlochovice in Husí potok Watershed
Matoušek, Petr ; Sobotková, Veronika (referee) ; Dumbrovský, Miroslav (advisor)
A subject of this Thesis is the design of the complex system of measures of soil conservation in given catchment area, which will serve as a concept of complex land consolidation in cadaster Jerlochovice. Based on the analysis and the land survey, a feasible solution was designed using the hydrological and erosive tools of ArcGIS. For the identification of areas endangered by erosion and for the identification of runoff conditions, the Universal Soil Loss Equation of Wischmeier-Smith was used (in grid modification). Based on the calculated values, the suitable technical and agrotechnical measures of soil erosion control were designed. Each component was designed for the values of Qn from the model DesQ. Subsequently the efectivity of the designed measures was evaluated by the comparison of results of erosive and runoff conditions before and after the aplication of the soil and water conservation measures.
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Conditions of Waste-made Fuel Combustion including legislative Requirement
Matoušek, Petr ; Pavlas, Martin (referee) ; Novotný, Pavel (advisor)
This bachelor’s thesis describes possibilities of usage of waste-made fuel from point of view of energetic utilisation in industry and power supply. There is a brief overview of energy resources structure, current situation in energy production and in waste management in Czech Republic. Particular types of waste-made fuels are also specified. One of the main parts of this work is fundamental analysis of legislation which governs waste management and alternative fuel usage. In the last part of the thesis the possibility of usage of mechanical-biological treatment as a waste management system is assessed.
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Process Management and Possibilities of Its Implementation in the Chosen Organization
MATOUŠEK, Petr
This thesis deals with the topic of process management and its importance within the modern management conception. The literature search introduce the progress of the process management and its principles, the approaches to improve the management processes, it presents the chosen tools of the process modelling, sorts of changes in the transition from the functional to process management, and introduces more closely the Business Process Reengineering and Total Quality Management. The practical part attends to the analysis of the present state of the choosen company, presents the company basic characteristics, organization structure, working positions, staff evaluation system, it identifies and describes the core, secondary and supportive managerial processes in progress within the company. Deals with the proposals how to implement the process management elements within the measurement and evaluation of processes, staff motivation and internal communication. The main benefits of this thesis include the elaboration of the process map of the organization, diagrams of the majority of processes together with their detailed descriptions, denomination of the staff responsible for the particular processes, determination of the key performance indicators suitable for the measuring of the processes effectiveness in time. We have elaborated the questionnaire on the periodic measurement of the customer satisfaction. We have also designed a new module of staff remuneration and suggested the implementation of the knowledge database and other precautions having an influence on the process management, internal communication and, in particular, on the customer satisfaction.
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Získávání informací ze systémů na správu verzí
Kučera, František ; Pavlíček, Luboš (advisor) ; Matoušek, Petr (referee)
Tématem této bakalářské práce je získávání informací ze systémů pro správu verzí. Cílem práce je jednak rozbor současného stavu zahrnující popis několika vybraných existujících systémů a jednak vyvinutí aplikace SVN Statistika a nastínění jejího dalšího rozvoje. Tato aplikace slouží k vytváření výstupů z úložišť systému Subversion. Úvod práce se týká obecně systémů pro správu verzí, potom následuje kapitola o teoretické stránce získávání informací z těchto systémů a následuje praktický popis několika existujících aplikací (systémů) pro získávání informací. Po kapitole o Subversion následuje popis vyvinuté aplikace a ukázky výstupů.
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