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Methods for measurement of data network performance and quality parameters
Sukup, Luboš ; Zeman, Václav (referee) ; Novotný, Vít (advisor)
Master thesis involves the development of quality measurement issues and performance parameters in data networks. It describes the main technologies as they affect the quality and performance parameters and the effect of these parameters for voice, video and data services. Next are listed some methods for measuring parameters of the data network.In the practical part is selected one method of measuring network parameters and properties of this method are demonstrated by illustrative examples.
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Linux OS Monitoring
Korček, Juraj ; Očenášek, Pavel (referee) ; Trchalík, Roman (advisor)
The aim of this bachelor's thesis is design and implementation of monitoring tool for GNU/Linux operating systems. This program monitors logs created by system, system load and computer resources. It notifies system administrator in case of high system load, abnormal behavior or when an error occurs. The resulting product is especially aimed for system administrators of GNU/Linux, whose work will be simplified due to this software utility, which sends notification of only important system changes. It is implemented in scripting language Python and divided into smaller independent scripts for easy implementation of new scripts in the future. This programming language was chosen to ensure operation among all GNU/Linux distributions.
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Project of Client-based VPN Remote Access Solution for the worldwide Retail Business Company in the region of Central Europe
Ondrák, Richard ; Havlín, Petr (referee) ; Kříž, Jiří (advisor)
The aim of this Thesis is to project and describe new Client-based Remote Access Solution for the Tesco Stores retail company in the region of Central Europe. Based on facts that the all present Tesco’s Remote Access Systems have not any longer met the increasing requirements and needs of corporate users and suppliers it is clear that the main scope is to find and implement such Solution that will meet and exceed all requirements. The main Project Aspects are to be the ease of use, security of the solution, unexacting administration of the system and user groups, and one unified Solution for the all Countries from the region of Central Europe that is suitably integrated in the Tesco IT infrastructure.
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Message Logging System
Vrzal, Miroslav ; Křivka, Zbyněk (referee) ; Zendulka, Jaroslav (advisor)
This master's thesis in the first part describes the AS/400 and its message system and concentrates especially on the following areas: predefinition of messages and their storing, types of messages and levels of their importance, work with variables included in message text and ways of sending messages. On the basis of AS/400 message system is designed and implemented message log system for the application loggin for Aegis. s.r.o. The analysis of the message log systems is also a part of the work. The syslog and syslog-ngused in UNIX systems are described, concerning types of messages, importance of messages and filtering and storing of messages. It further describes possibilities of application logging based on Java in the specific case of the Log4jutility. In the second part thesis describes own log message systems design and implementation.
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System for Parallel Processing of URL Requests
Horáček, Jan ; Matoušek, Petr (referee) ; Ráb, Jaroslav (advisor)
The work treats of programming multithreaded application, focused on processing the demands for URL calling. The application was programmed in the ANSI norm of the language C. It runs as independent daemon, which must faciliate, in maximum possible scale, searching for demands, which weren't successfully processed. For URL calling it uses the library libCURL and installing in station of package autotools.
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Integration of SELinux Audit Logs into ABRT Tool
Vrabec, Lukáš ; Kačic, Matej (referee) ; Barabas, Maroš (advisor)
The main aim of the thesis is to introduce the security of Linux operating systems and the access control list mechanism. The thesis focuses on processing security messages produced by the security mechanism into logging services and on displaying those messages. In addition, the thesis includes a concept solution and its implementation, which integrates security messages into a centralized system, keeps them and reports bugs in the Linux community distribution Fedora and in the Linux commercial distribution Red Hat Enterprise Linux.
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IT/OT modular honeypot
Nečas, Martin ; Fujdiak, Radek (referee) ; Blažek, Petr (advisor)
V bakalářské práci byl realizován modulární a škálovatelný systém honeypotů zaměřený na IT a OT. Cílem bylo navrhnout a implementovat systém, který umožní snadné přidávání modulů reprezentujících komunikační protokoly a virtuální zařízení a silně zdůrazňuje modularitu. Honeypoty jsou nasazeny v kontejnerech a systém aktivně monitoruje komunikaci mezi těmito kontejnery a útočníky. Všechny komunikační aktivity jsou uloženy v centralizovaném logu pro důkladnou analýzu a monitorování.
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Log analysis of active network elements
Kajánková, Petra ; Zeman, Václav (referee) ; Slavíček, Karel (advisor)
The master thesis focuses on the issue of searching for malicious activity originating from authorized users who have permission to modify devices. The theoretical part first introduces the basic network model ISO/OSI, together with TCP/IP. It then focuses on the two most well-known logging protocols, the Syslog protocol and SNMP. The practical part of the work consists of the theoretical design and subsequent implementation of the program that is able to evaluate records of events occuring on individual network devices.
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Linux OS Monitoring
Korček, Juraj ; Očenášek, Pavel (referee) ; Trchalík, Roman (advisor)
The aim of this bachelor's thesis is design and implementation of monitoring tool for GNU/Linux operating systems. This program monitors logs created by system, system load and computer resources. It notifies system administrator in case of high system load, abnormal behavior or when an error occurs. The resulting product is especially aimed for system administrators of GNU/Linux, whose work will be simplified due to this software utility, which sends notification of only important system changes. It is implemented in scripting language Python and divided into smaller independent scripts for easy implementation of new scripts in the future. This programming language was chosen to ensure operation among all GNU/Linux distributions.
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