National Repository of Grey Literature 22 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
Implementation of server services in stress tester
Berg, František ; Frolka, Jakub (referee) ; Člupek, Vlastimil (advisor)
This bachelor thesis deals with the analysis and implementation of DNS, DHCP and NTP server services into a stress tester developed at the Institute of Telecommunications. All services are implemented in the Ubuntu Linux distribution through the software packages bind9, isc-dhcp-server and ntp. A graphical interface has been created for all services that can be used to start and stop the services. It is also possible to define the version 4 and 6 IP address, port and network interface on which the service listens. All services use the newly created configuration files for their operation using the Server Emulator module, while the original configuration is retained. This article describes the theoretical basis of the selected server services and then the
Comparison of technologies for vehicle passage detection
Mareková, Martina ; Frolka, Jakub (referee) ; Krajsa, Ondřej (advisor)
System for vehicle detection and speed measurement system is an important part in traffic control as well as in providing data for intelligent and automated traffic signs. These technologies are divided into two types: intrusive and non-intrusive methods. Traditional traffic control is based on inductive loops. This method is intrusive and therefore requires intervention under the road and higher maintenance requirements. We can avoid this problem with non-intrusive methods, including video analysis, microwave radars, geomagnetic radars, weighing sensors and laser sensors, but these are more expensive alternatives. By implementing radars we performed measurements on road sections, on the basis of which the output data from microwave, weigh-in-motion sensors and induction loops were displayed. We receive processed and unprocessed output data of measurements from each sensors. For processing of those data is created software solution for graph rendering and direct measurement of the sensor accuracy in comparison with competing technology. The results of the measurements showed that the efficiency of the individually implemented sensors is sufficient for use in traffic control. As well we can consider the implementation of microwave radars and cameras for video analysis as a replacement for the conventional method of induction loops.
SDN for cloud computing
Kuklovský, Adam ; Frolka, Jakub (referee) ; Slavíček, Karel (advisor)
The theme of this bachelor work is SDN technology. It consists of both practical and theoretical part. In theory section, we described the main concept of the SDN network, functioning of OpenFlow protocol, comparison of individual open source SDN controllers and real onset of SDN technology. Practical section contains procedure of individual components being installed to create topology and to forward realization of laboratory task. The laboratory work also depicts the way of creation and modification of streams in the SDN network.
Evolution of link layer loop prevention protocols
Březina, Jiří ; Frolka, Jakub (referee) ; Slavíček, Karel (advisor)
This bachelor thesis deals with the possibility of eliminating and creation loops on theData Link layer of the OSI model. At first, it was necessary to determine what arethe loops and how they are formed. Then the solution of the problem with loops waspresented as the Spanning Tree protocol, where did the protocol come from, protocoloperation, his advantages and disadvantages. In next section were discussed other vari-ants of original STP, as well as his alternatives, like for example the TRILL or the SPBprotocol. The practical part of this work is based on the theoretical and shows howSpanning Tree protocols work in practice on real devices. This part is mainly focusedto testing the speed of convergence each of protocols and also their extensions. In theend is mentioned a laboratory task, which is part of the appendices and forms the mainbenefit of the whole thesis, because future students at school subject “network architec-ture” can try to configure protocols that was mentioned above and better understandhow these protocols work.
Architecture and management of secure networks
Štangler, Jan ; Frolka, Jakub (referee) ; Člupek, Vlastimil (advisor)
This work is focused on the security of small to medium-sized networks with central administration, especially on the creation of a methodology for secure network design.The design of a secure network for a start-up IT company, using open-source software, is described. Deployment of the designed secure network, with central management, is performed and the connectivity of network elements are tested. The model simulates network traffic situations and network attacks using penetration testing techniques. In terms of the severity of the impact on network security, intercepted attacks are evaluated and immediately reported to responsible persons. Finally, the results of the intercepted attacks are processed and further actions are recommended.
Analysis and Detection of RAT Malware
Sidor, Samuel ; Frolka, Jakub (referee) ; Hajný, Jan (advisor)
Goal of this bachelor’s thesis is studying problematics of various types of malware with specific focus on RAT (Remote Access Trojan) category. This thesis will also acquaint reader with static and dynamic binary analysis and terms like reverse engineering, sandboxing, decompilation, etc. Then chosen malware families will be analysed and for these families detection rules in YARA language will be created. Except this, reader will be acquainted also with protection against RAT malware and finally data acquired from detail analysis will be evaluated.
Methodology for testing the security and performance of firewalls
Sasko, Dominik ; Člupek, Vlastimil (referee) ; Frolka, Jakub (advisor)
This bachelor thesis focuses on analysis of security and performance of firewalls and designing a methodology for testing them. Theoretical part is devoted to explaining firewalls and its' division and describing functions of next generation firewalls. Beginning of practical part focuses on testing security using penetration programs and shows results of each security test. Practical part continues with performance tests in various scenarios using Spirent Avalanche and compares the results with values stated by the manufacturer of firewall Hillstone.
Monitoring of servers with OS Linux
Šuba, Filip ; Frolka, Jakub (referee) ; Komosný, Dan (advisor)
This bachelor’s thesis deals with monitoring of a servers in experimental network PlanetLab. The beginning of the thesis is about PlanetLab network, terminology used within it and also projects realized in it. For generating information about node, has been created a module in Python, which has been integrated into application Plbmng. Application has been published under the MIT license on \url{} and on Python Package Index For the application has been created manual and for the module has been created documentation.
Security of mobile devices running Android in a corporate environment
Pecl, David ; Dvořák, Jan (referee) ; Frolka, Jakub (advisor)
The thesis deals with the security of the Android operating system. Firstly, it describes the basic architecture of the system and the security mechanisms we can find in this system, namely Linux kernel, application sandboxing, and application permissions. In the second part, it describes threats and attacks on the Android devices. Describes the risks to which the users are exposed and the impact on the device, user, and data security. For each threat and attack, the way the device can be compromised is mentioned. Threats and attacks are rated using CVSS. It also deals with Android updates. The last section describes applications that can be used to manage and secure Android mobile devices primarily in the corporate environment. There are described features of these applications and against what threats or attacks provide protection. Furthermore, there are examples of such applications. The thesis also provides a laboratory task that is created to demonstrate the mobile device management systems that are used in the corporate environment. Also, study material is created in the form of presentation for both lecture and self-study.
Application for batch management of Mikrotik network devices
Kloda, Tomáš ; Frolka, Jakub (referee) ; Krajsa, Ondřej (advisor)
The goal of the thesis is to describe and develop web application for large-scale management of MikroTik network devices. The theoretical part describes RouterOS operating system. This work also describes communication through MikroTik API service. Next section includes brief description of tools, which were used for the web application development. The practical part describes development and realization of the web application. The web application is intended for Linux based operating systems.

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