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Testing the response of operating systems to different IPv6 flows
Ruiner, Michal ; Polák, Ladislav (oponent) ; Jeřábek, Jan (vedoucí práce)
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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New functions of client application for DNS protocol for lectures
Ramosová, Patrícia ; Komosný, Dan (oponent) ; Jeřábek, Jan (vedoucí práce)
The aim of this Master thesis entitled New functions of client application for DNS protocol for lectures is to gain understanding of domain name translation protocols, examine the existing clientDNS application, its source codes and compare it with similar existing tools, such as DNS Benchmark, Nslookup and Dig. Based on the performed analysis, new functionality was designed and various errors that the original application contained were identified. After implementing the proposed features and minor improvements, the new version of the DNS client app has been properly tested. The main innovations of the application consist of new modules for DNS over TLS and Link-Local Multicast Name Resolution protocols, and a new module for Mass testing of DNS servers and domain names. Minor improvements consist mainly of a new graphical interface adapted for small and large screens, multi-thread architecture, automatic translation and much more.
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Klient protokolu DNS s grafickým rozhraním vhodný pro demonstrativní účely
Sousedík, Tomáš ; Lattenberg, Ivo (oponent) ; Jeřábek, Jan (vedoucí práce)
V práci je popsán protokol DNS, zprávy, které při své komunikaci tento protokol používá. Práce popisuje protokol od jeho vzniku, důvody, proč vznikl, popisuje funkčnost protokolu. Dále se zabývá multicastovými možnostmi překladu jmen, konkrétně probírá mDNS a LLMNR. V druhé části je podrobně popsána struktura a využití jednotlivých zpráv. V poslední části práce je popsán návrh vlastního programu, který byl na základě získaných poznatků navržen. Samostatná kapitola práce je věnována podrobnému popisu programu a jeho jednotlivým částem. Velká část je také věnována testování programu. Jsou zde popsány problémům, které během vývoje programu nastaly a jejich řešení.
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Security testing of selected communication protocols and related vulnerabilities
Kuklovský, Adam ; Langhammer, Lukáš (oponent) ; Jeřábek, Jan (vedoucí práce)
This master’s thesis extensively addresses the functionality and characteristics of the IPv6 protocol and its control protocol ICMPv6. Furthermore, the thesis discusses methods of penetration testing and technologies used in creating the testing environment. A key output of this work is a network scanning tool that has been compared with the popular Wireshark program. The conclusion describes the structure of the proposed tool and suggests possibilities for its future development and improvement.
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New functions of client application for DNS protocol for lectures
Ramosová, Patrícia ; Komosný, Dan (oponent) ; Jeřábek, Jan (vedoucí práce)
The aim of this Master thesis entitled New functions of client application for DNS protocol for lectures is to gain understanding of domain name translation protocols, examine the existing clientDNS application, its source codes and compare it with similar existing tools, such as DNS Benchmark, Nslookup and Dig. Based on the performed analysis, new functionality was designed and various errors that the original application contained were identified. After implementing the proposed features and minor improvements, the new version of the DNS client app has been properly tested. The main innovations of the application consist of new modules for DNS over TLS and Link-Local Multicast Name Resolution protocols, and a new module for Mass testing of DNS servers and domain names. Minor improvements consist mainly of a new graphical interface adapted for small and large screens, multi-thread architecture, automatic translation and much more.
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Klient protokolu DNS s grafickým rozhraním vhodný pro demonstrativní účely
Sousedík, Tomáš ; Lattenberg, Ivo (oponent) ; Jeřábek, Jan (vedoucí práce)
V práci je popsán protokol DNS, zprávy, které při své komunikaci tento protokol používá. Práce popisuje protokol od jeho vzniku, důvody, proč vznikl, popisuje funkčnost protokolu. Dále se zabývá multicastovými možnostmi překladu jmen, konkrétně probírá mDNS a LLMNR. V druhé části je podrobně popsána struktura a využití jednotlivých zpráv. V poslední části práce je popsán návrh vlastního programu, který byl na základě získaných poznatků navržen. Samostatná kapitola práce je věnována podrobnému popisu programu a jeho jednotlivým částem. Velká část je také věnována testování programu. Jsou zde popsány problémům, které během vývoje programu nastaly a jejich řešení.
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