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System for testing the robustness of communication unit LAN of remote data acquisition
Mlýnek, Petr ; Zeman, Václav (referee) ; Mišurec, Jiří (advisor)
Remote data collection systems are widely used. One of the area is also data collection in energetics, where the energy consumption can be collected daily and presented to users on-line. The advantage of the remote data collection is possibility of frequent readings without a physical presence at the electrometers. The data transmission over the Internet can be subject of various attacks, which is the disadvantage. The understanding of attack method is the most important thing. The protection against the hackers is not complicated, but requires lot of attention. This master's thesis is focused on testing security of the communication unit LAN of remote data acquisition against attacks from the Internet. The next aim of this thesis is to describe algorithm of particular attack, needed recourses for their realization and method of their measurement and evaluation. Communication unit and component composition for attacks simulation is described in the first part of this thesis. The next part is focused on scanning for hosts and ports. The main part of this thesis is focused on the denial of service attacks and man in the middle attacks. In the end of my thesis is described selection of cryptographic system for remote data acquisition and is showed possibility of authentication mirroring. Problems of physical security are described too. The result of this thesis is script implementing all attacks, which are described.
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Monitoring of services within active network elements by Mikrotik
Kamenář, Filip ; Slavíček, Karel (referee) ; Grenar, David (advisor)
This bachelor thesis deals with the monitoring of the VPN services on the networking elements Mikrotik. The theoretical part includes the description of RouterOS system, management options and networking devices used. The thesis consists of the description of the VPN services and analysis of PPTP, SSTP, L2TP and OpenVPN protocols, which are implemented in the practical part of this work. The theory also contains the description of monitoring devices included in the RouterOS system. In comparison, external tools are enlisted. Chosen monitoring tools are therefore implemented in the practical part of the thesis and in the monitoring script. The practical part of the bachelor thesis is focused on the establishment of VPN tunnels and its parameter measurement. The VPN clients are to be found in the Czech Republic, Ukraine and Egypt, which establishes the real conditions for network monitoring status. The final part of the work deals with the script, which is created for the automatic-monitoring of VPN service in the accessible network and sends the gathered data to the operators. The aim of the thesis is to illustrate the usage of integrated monitoring tools in the RouterOS system in the network built on the Mikrotik elements. The chosen monitoring service was the service VPN, which is being used for remote access to the local networks from distant part of the world by the corporations but also individuals. Individual monitored parameters are enlisted and compared depending on client geographic location.
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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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Network and Application Response Time Monitoring
Sagál, Peter ; Žádník, Martin (referee) ; Tobola, Jiří (advisor)
This bachelor's thesis deals with analysis of requirements, design and implementation of application for monitoring of network, network components and application's response time, network components and applications. Document will introduce two basic methods of monitoring and analysis of network responses - passive and active monitorng, which is the basis of suggested application that provides a web interface for management and presentation of monitoring results.
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Implementation of open source system for network monitoring
Scripnic, Dmitrii ; Sládok, Ondřej (referee) ; Grenar, David (advisor)
The bachelor thesis deals with network monitoring. In this work, a theoretical analysis of known monitoring systems was performed and their architecture, properties and work with these systems were also described. Subsequently, a comparative characteristic of all described systems was performed. At the beginning of the practical part, the installation and configuration of all monitoring systems and their evaluation was performed. The second part deals with the Zabbix monitoring system, where more emphasis was placed on monitoring IP service delays.
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A Tool for Shell-Script Analysis
Holomek, Jiří ; Janoušek, Vladimír (referee) ; Smrčka, Aleš (advisor)
This bachelor's thesis deals with analysis of scripts. In the current distributions of Linux or other operating systems based on the Unix principals, there is made a lot of configuration by using scripts. The main objective of this work is to create a program that analyses the scripts and also reports theirs functionality and safety to a user. According to my research the work is aimed to Bash language.
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Administration of development documetation over WWW II
Gregárek, Ondřej ; Sysel, Petr (referee) ; Balík, Miroslav (advisor)
Document server is a web application controllable by way of web browser. It is meant to serve for the management of development documentation. The application is divided to the four basic parts: Requirements, Products, Tests and Test Run. The section Requirements serves for inserting requirements for products. Product is produced on the basis of these needs and registered in part Products. Test setting is created in the part Tests according to requirements from the part Requirements. Particular products are then tested. The part Test Run registers records of these tests. These are parts of the application: management of users, connecting supplements to records, printing and exportation of data to different formats, saving history of records, filtration and sorting of entries, etc. All the data is saved in the database MySQL. The application is written in scripting language PHP. Data is presented by template system Smarty. The output is in language XHTML. Cascading style CSS is used to formatting. This work describes development of the application. First it is dealing with the proposal of the database, connection and structure of particular tables. The function of the programme is explained in detail at the same time, which is essential for the correct proposal of the database. The application is based on the database. The selected structure of files and relations of scripts to library functions are shown. The template system and the interface for access of the programme to the database are explained. The most attention is paid to the description of solving important functions of the application, i.e. listing of records, their pagination, filtration, sorting and operation with them: saving, browsing, copying, confirmation and work with history, category and problems by upkeep of consistent tree and export of data to various formats. It is always outlined the problem, the idea of solving and the description of appropriate scripts. Samples of source code are also included for better understanding of complicated algorithms.
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Web application for classroom managment
Bartoňová, Veronika ; Šilhavý, Pavel (referee) ; Krajsa, Ondřej (advisor)
In this bachelor's thesis I deal with design and implementation of web-based interface for remote administration of phones. For the implementation of this project was chosen development environment language PHP and MySQL database system. The result of this project will create a application, which is secure against the instrusion of unauthorized persons, for one particular type of telephone set.
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Script Language for Image Processing
Zuzaňák, Jiří ; Herout, Adam (referee) ; Zemčík, Pavel (advisor)
This thesis deals with design of scripting language, especially specified for effective image processing. Introduction of this thesis is focused on studying and also appropriation of methodology of compilers and interpreters design, include their following application in design of the scripting language and as well its interpreter. Another point of my work is showing the methods of design and implementation of the interpreter including automated methods used in the design of the implemented program. Next part deals with description of structure and implementation of the designed program, intended for generating compiler of any language which is described in input of this program. The conclusion of this work is more detailing description of the scripting language design; its implementation is based on the methods mentioned before.
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Monitoring of Internet servers
Pospíchal, Ondřej ; Burget, Radim (referee) ; Komosný, Dan (advisor)
This thesis deals with the availability of devices and the availability of remote connection to devices via SSH in the network PlanetLab worldwide. The theoretical part consists of the description of the network PlanetLab, services ping and SSH, program environment, in which was the practical part made, and parallelization of processes, which was used during optimizing the program. The practical part describes the creation, functions and outputs of the application, which continuously tests servers in the network PlanetLab. Analyzing the results of the program it was found that the availability of PlanetLab devices is relatively stable, but unsatisfactory. More than half of the devices of this network do not respond to neither one of mentioned services.
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