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IPv6 Geolocation and Visualization
Suchomel, Tomáš ; Veselý, Vladimír (referee) ; Matoušek, Petr (advisor)
This master's thesis is focused on geolocation and visualization of IPv6 addresses. Several current approaches to geolocation have been discussed. Its main goal is to design geolocation database with regular updates with ability to visualize geographic location of the IPv6 address on the world map. Implemented system is gathering data about IPv6 prefixes from public Whois database. Gathered geographical addresses are mapped into coordinates by Google Maps Geocoding API. All gathered data are being saved into database together. Locations of IPv6 addresses are visualized via web-based Google Maps API. Moreover, the density mapping of IPv6 address blocks in particular countries can be visualized too.
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User Oriented QoS System
Plchot, Oldřich ; Matoušek, Petr (referee) ; Kašpárek, Tomáš (advisor)
This master's thesis deals with the possibilities how to guarantee the quality of service in the area of computer networks using a GNU/Linux operating system. This work compares and evaluates tools which are necessary to guarantee the quality of service. The goal of this work is to discuss the advantages and disadvantages of these tools and to design a system which handles the problem of quality of service. Designed system uses a heuristics, which allows the user to set up the quality of service system without studying specific properties of communication protocols on the network or application layer. This work also includes a theoretical introduction into the quality of service and computer networks.
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Longest Prefix Match Algorithms
Kováčik, Michal ; Tobola, Jiří (referee) ; Kořenek, Jan (advisor)
This thesis focuses on algorithms for longest prefix match (LPM), which is the key operation in packet classification and routing in TCP/IP networks. A space for analysis of commonly used algorithms with emphasis on their speed and memory efficiency is dedicated along with necessary theory. Focus is then oriented on IPv6 networks, their typical prefix sets and comparison of suitable algorithms. Afterwards, the optimization for selected algorithm is suggested and implemented in programming language Python.
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IPv6 Network Prefix Translation
Ježek, Lukáš ; Polčák, Libor (referee) ; Grégr, Matěj (advisor)
This master thesis deals with testing network prefix translation algorithm in IPv6. It tests existing implementation. This implementations are compared with each other. Some implementations end with error compilation. There are two options how to deal with this problem, it might be repaired or the port to the new kernel is created. Performance is tested with Spirent hardware packet generator.
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Longest Prefix Match in High-Speed Networks
Skačan, Martin ; Tobola, Jiří (referee) ; Kořenek, Jan (advisor)
This thesis deals with the Longest Prefix Matching (LPM), which is a time-critical operation in packet forwarding. To achieve 100Gbps throughput, this operation has to be implemented in hardware and a forwarding table has to fit into the on-chip memory, which is limited by its small size. Current LPM algorithms need large memory to store IPv6 forwarding tables or cannot be simply implemented in HW. Therefore we performed an analysis of available IPv6 forwarding tables and several LPM algorithms. Based on this analysis, we propose a new algorithm which is able to provide very low memory demands for IPv4/IPv6 lookups. To the best of our knowledge, the proposed algorithm has the lowest memory requirements in comparison to existing LPM algorithms. Moreover, the proposed algorithm is suitable for IP lookup in 100Gbps networks, which is shown on new pipelined hardware architecture with 140Gbps throughput.
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Secure Neighbor Discovery Protocol
Bezdíček, Lukáš ; Halfar, Patrik (referee) ; Grégr, Matěj (advisor)
This report deals with designing and implementing of a complete SEND protocol for operating systems GNU/Linux. The first part of the document contains a description of ND and SEND protocols. The second part of the document defines security threats connected with unsecured ND. The third part of the report describes a design and implementation of SEND protocol named sendd . Conclusion of the document is dedicated to a summary of accomplished results and information about future development of this project.
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Modelling of Distance-Vector Routing Protocols
Trhlík, Jiří ; Matoušek, Petr (referee) ; Veselý, Vladimír (advisor)
This master thesis deals with the implementation of the RIPng routing protocol in the OMNeT++/INET environment. It describes the RIPng protocol and its specifics on the Cisco devices. It clarifies important concepts such as IPv6 and distance-vector routing protocols. The thesis also describes the OMNeT++ environment and the INET Framework, where it focuses on the current status of implementation of the components required for the RIPng protocol integration.
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An Analysis of Selected IPv6 Network Attacks
Pivarník, Jozef ; Podermański, Tomáš (referee) ; Grégr, Matěj (advisor)
This master's thesis analyses and demonstrates selected IPv6 attacks including two Man-in-the-Middle attacks and one Denial of Service attack - Rogue Router Advertisement, Neighbor Cache Poisoning and Duplicate Address Detection DoS, respectively. In the first part the author presents necessary information related to the issue and provides detailed information on how to realize these attacks in practice using publicly available tools. The second part of the thesis presents various ways of mitigating presented attacks, analyses implementations of some of those countermeasures on Cisco and H3C devices and discussess their applicability.
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Automatic Transport Protocol Detection in Captured Communication
Lazárek, Zbyněk ; Kmeť, Martin (referee) ; Pluskal, Jan (advisor)
The aim of this bachelor thesis is to create a library in C#, which will be able to automatically detect transport protocols in a captured network traffic. This library can recognize a transport protocol in tunnel traffic without the knowledge of tunneling protocol. The~thesis describes the unique signatures of TCP / IP protocols on which the automatic detection is based. Furthermore, it is described how the detection works. The conclusion is~subjected to automatic detection tests, which are designed to review its performance and efficiency.
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IPv6 and power efficiency in Wireless Sensor Networks
Kladiva, Roman ; Šimek, Milan (referee) ; Červenka, Vladimír (advisor)
This bachelor's thesis deals with wireless sensor networks in terms of energy performance of IPv6. It contains a description of wireless sensor networks, sensor node analysis and 6LoWPAN and IPv6 protocols. The another part of the thesis is focused on adaptation layer 6LoWPAN and tools, which used to minimize the transmission unit, and thus to reduce energy consumption. Problems of energy consumption in wireless sensor networks is discribed in the thesis and its possible solutions at the physical and link layers. There are analyzed in detail possibilities of sleep mode and various MAC layer protocols are analyzed in detail. The measuremenr overview of the sensor node and own proposal to improve the measurement method are discribed following in the thesis.
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