|
|
Automation of MitM Attack on WiFi Networks
Vondráček, Martin ; Lichtner, Ondrej (referee) ; Pluskal, Jan (advisor)
Tato bakalářská práce se zaměřuje na výzkum v oblasti bezpečnosti bezdrátových sítí. Práce přináší studii široce využívaných síťových technologií a principů zajištění bezpečnosti bezdrátových sítí. Analyzované technologie a způsoby zabezpečení trpí slabinami, které mohou být zneužity k provedení útoku MitM . Práce zahrnuje přehled dostupných nástrojů zaměřených na využití jednotlivých slabin. Výsledkem této práce je balíček wifimitm a CLI nástroj, oba implementované v jazyce Python. Balíček poskytuje funkcionalitu pro automatizovaný útok MitM a může být použit jako součást dalšího software. Nástroj wifimitmcli je schopen úspěšného provedení plně automatizovaného útoku bez jakéhokoli zásahu útočící osoby. Tento výzkum nachází využití v oblasti automatizovaných penetračních testů a forenzního vyšetřování.
|
|
|
Kernel module definition and networking server configuration for Linux operating system
Pecho, Ladislav ; Matocha, Tomáš (referee) ; Komosný, Dan (advisor)
The goal of my work is to create two computer labs lessons. The first one is a guide in writing a simple Linux kernel module, and in making a file inside the procfs filesystem. The content of the file can be decided as late as at the moment of reading. The second lesson describes the configuration of a server which allows a computer to boot over network. DHCP server is used with a TFTP server for file transfers which are both handled by the dnsmasq program. The example configuration will display a menu on the client station. It is possible to select to boot either a Linux kernel, floppy disk image, Linux network installer, diagnostic tool Memtest, or a text mode game Grub Invaders. The chosen bootloader is pxelinux from the syslinux project.
|
|
|
Installation, configuration and testing of server services DHCP, FTP, VPN, NAT and SNMP in IPv4 and IPv6 environments
Brázda, Libor ; Sysel, Petr (referee) ; Novotný, Vít (advisor)
This bachelor thesis focuses on selecting server services such as FTP, DHCP, VPN, NAT and SNMP and their implementation in operating system Windows Server 2008 R2 and linux distribution Debian. The theoretical part analyzes the problems of TCP/IP protocol including addressing in IPv4 and IPv6 environments. In next chapters, thesis contains detailed descriptions of individual services, their principles, security, etc. The last part is focused on the description of the laboratory task, their activities and contribution to student and also software used in the implementation tasks. The result of laboratory work is created job on the configuration of individual services in both operating systems. Tasks are made for students without previous knowledge of the problem, so they can successfully configure and test these tasks.
|
|
|
Universal linux server for small and medium companies enabling simple network control
Juřena, Stanislav ; Pust, Radim (referee) ; Burda, Karel (advisor)
The main object of this thesis was to design a computer network for small and medium companies which will be made among others from network server providing simple network control. The next task was to provide internet connection to subscribers of local area network, their security and access to common services. There had been discussed the choice of distribution of Linux operation system with regarding to demanded services, stability and long lasting operation in theoretical part. One part of the work is a theoretic preliminary to separate services, to the purpose of their using and to their weaknesses. The practical part deals with an installation and configuration of Debian operating system, launching the base services and the setting of selected monitoring programs.
|
|
|
DHCP Monitoring Using IPFIX
Vaňátko, Matěj ; Polčák, Libor (referee) ; Matoušek, Petr (advisor)
This thesis describes procedures for traffic monitoring of network protocols BOOTP, DHCP for IPv4 and DHCP for IPv6 through netflow probes FlowMoon made by Invea-tech. There are outlined the issues of these protocols, the functionality of the FlowMoon probe, a general description of NetFlow and the description of the solution for collecting and evaluation of the data. A deep analysis was made, and later on the modules for FlowMoon probe was written giving the possibility to monitoring of these protocols. Their implementation, method of testing and evaluation of gathered data is described in this paper.
|
|
|
New laboratory exercises in OMNeT++ simulation enviroment
Petrůj, Jakub ; Sládok, Ondřej (referee) ; Langhammer, Lukáš (advisor)
This Bachelor thesis illustrates a draft and creation of two lab exercises in a network simulation environment of OMNeT++ with INET Framework extension on behalf of Communication Technologie course. Initialy, simulated environment itself is defined and, including NED language and its modules, then the process of simulation and analysis of its results are presented and discused. Further more this work describes theoretical network knowledge required to create the simulation and treat its results. The first methodical part of this work compares HTTP, FTP, Telnet and VOIP protocols in simultaneous and non simultaneous running, with increased occurance of errors on line or its complete outage. The second methodical part of this work observes dynamic network configuration using DHCP protocol more in detail. Futhermore, this part studies the question of both non-efective and efective subnetting and handles issues concerning static adressing of network.
|
|
|
Hotelnet Information System
Šturala, Aleš ; Rychlý, Marek (referee) ; Masopust, Tomáš (advisor)
The main objective of my work was to create a system administered over the web interface, where administrators may control users and computers in a small-area network (max. 250 computers). The system is modular to meet requirements of different networks and is administered over the web interface. A part of the whole system is created by PHP scripts for a Linux router, which are connected to the database and can set the router. Users have assigned rights to access to different parts of the system. The system was developed in common technologies like database system PostgreSQL, script language PHP, and mark-up language HTML.
|
|
|
Automatic configuration of intermediate networking devices used in Cisco academy
Verner, Lukáš ; Jeřábek, Jan (referee) ; Komosný, Dan (advisor)
his semestral´s thesis deals with proposal and system implementation for automatic configuration of Cisco network devices. This system is called AutoConf and it is intended for distant copying configuration files from eagle-server to the switches and routers in Cisco academy laboratory. It is handled by web pages placed on eagle-server. In this system, user can create new laboratory exercises with configuration files for network devices and then these files could be used for configurations. Informations about done configurations are saved in relation database MySQL. Network devices which will be configured by system AutoConf have to be connected with eagle-server. To setup their connection settings was created decision-making mechanism. If it detects physical connection between network device and eagle-server before network device starts, it will set network device for communication with eagle-server.
|
|
|
Modeling the Basic Principles of Communication Technologies
Ruiner, Michal ; Koláčková, Aneta (referee) ; Hošek, Jiří (advisor)
This bachelor thesis deals with the design of 5 laboratory tutorials where the basic principles of communication technologies are modelled. A reader is apprised with the available software first for the simulation of network technologies. The simulators and emulators are compared. Packet Tracer, a software developed by the Cisco company, is chosen for the lab exercises and Wireshark, a network protocol analyzer, for the traffic capturing on a local PC. Then the reference model ISO/OSI is described for the basic introduction to the principle of network communication. The Chapter 3 explains the basic problematics of network paths searching, the routing table contents and division according to the type of routing and routing protocols groups. In the next chapter, particular communication protocols used in the labs are analyzed in detail. Final part briefly describes the implementation of all laboratory exercises. Laboratory tutorials are provided in the appendices.
|
|
|
Laboratory exercises explaining network technologies using various simulation instruments
Vaľuš, Dávid ; Ilgner, Petr (referee) ; Bečková, Zuzana (advisor)
This diploma thesis focuses on the preparation of an operating system, a simulation environment and the creation of two laboratory exercises explaining network technologies. In the theoretical part protocols DHCP, FTP, TFTP, HTTP, and NAT service are described. The practical part focuses on the installation of ns-3 and GNS3 programmes and their utilization and settings on OS Ubuntu 18.10. Moreover, it deals with the preparation of laboratory exercises created in the simulation programmes mentioned above together with tutorials, self-check questions and HTTP server in the Python programming language.
|
guest ::
