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Testing the response of operating systems to different IPv6 flows
Ruiner, Michal ; Polák, Ladislav (referee) ; Jeřábek, Jan (advisor)
The aim of the thesis is to create an array of virtual machines and research their response to the IPv6 protocol. Another significant part is to utilize the provided tool for generating and sniffing IPv6 traffic and verify its correct functionality. For such purpose, the GNS3 open-source software is selected. A~reader is familiarized with the concepts of virtualization, GNS3 functionality and various methods of software testing together with the implemented practical models. The IPv6 protocol is introduced in detail as well as the packet format, address types and several IPv6 protocols useful for the thesis. The practical part is discussed in the Numerical results chapter. The topology is established and connectivity verified using IPv4. Configuration of static IPv6 addresses is performed on the devices as well as configuration of router to distribute particular prefixes. 5 testing scenarios are proposed that increase the input load to the tool in sense of higher number of addresses for the 3 different modes - passive, active and aggressive. 3 scripts were developed. Performance testing script measures utilization of computational resources. The other 2 scripts perform packet capturing and further analysis to compare the results of proposed scripts with provided tool. The comparison is done utilizing passive and aggressive modes. Active mode is used to observe the response of various operating systems to different IPv6 flows. Specifically, multiple Windows 10 builds, Linux distributions, Windows XP, 7, 11, macOS and Android.
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Identity Detection in TCP/IP Architecture
Holkovič, Martin ; Matoušek, Petr (referee) ; Polčák, Libor (advisor)
This work deals with detection of users within computer networks on different layers of the TCP/IP architecture. These identities are identified by protocols running on the appropriate layers of the given architecture. PPPoE and SLAAC protocols were chosen as protocols that are used for network layer address assignments. The second type of protocol is the application protocol SMTP. We analysed communication using the chosen protocols in order to create metadata about the corresponding communication. The results of the analysis are finite state machines. Based on these finite state machines, software for legal interception was designed and implemented. Implemented software was tested on samples of data, in a specialized laboratory, and in a production network.
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Identity Detection in TCP/IP Architecture
Holkovič, Martin ; Matoušek, Petr (referee) ; Polčák, Libor (advisor)
This work deals with detection of users within computer networks on different layers of the TCP/IP architecture. These identities are identified by protocols running on the appropriate layers of the given architecture. PPPoE and SLAAC protocols were chosen as protocols that are used for network layer address assignments. The second type of protocol is the application protocol SMTP. We analysed communication using the chosen protocols in order to create metadata about the corresponding communication. The results of the analysis are finite state machines. Based on these finite state machines, software for legal interception was designed and implemented. Implemented software was tested on samples of data, in a specialized laboratory, and in a production network.
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Řešení dynamické konfigurace IPv6 klientů v počítačové síti MENDELU
Chumlenová, Barbora
In the first part of this bachelor thesis, there is an explanation and analysis of IPv6 network protocol basic features, which is becoming used as standard for network communication in this time. In the next parts of the thesis, there is an explanation of different variants of dynamic configuration. The SLAAC mechanism in combination with statefull and stateless DHCPv6. These variants were verified and tested in the laboratory of Computer Networking at the Department of Infor-matics FBE MENDELU. The goal of this thesis was to test these variants and choose the most suitable configuration of clients, which should be used in the production network MENDELU.
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