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Emulator transmission parameters of data networks
Grabovský, Štěpán ; Jeřábek, Jan (referee) ; Zeman, Václav (advisor)
This diploma thesis deals with a development of a network emulator operating in TCP/IP computers networks. This work contains a specification of transmission parameters and an analysis of concurrent systems both proprieties and open-sources. Afterward describes a relalization of the emulator itself. The core of the emulator uses well-known Linux tools tc, netem and iptables. An API of the program is realized by web service and for user interaction has been developed a web user interface. At the end of this work are listed and then discussed measured results of the emulator capabilities.
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Laboratory scenarios describing DNS system
Sakala, Peter ; Langhammer, Lukáš (referee) ; Jeřábek, Jan (advisor)
The master’s thesis deals with Domain Name System (DNS) and its practical use. It describes hierarchy of domain names, resource record types, protocol used, as well as DNSSEC extension. The most utilized implementations of authoritative and recursive DNS servers are presented. Virtualization, containers and other tools with potential use in labs are described. Two lab scenarios in virtualized environment with instructions for students were designed and developed in this thesis.
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Implementation of NetEm support for LNST
Procházka, Jiří ; Marek, Marcel (referee) ; Lichtner, Ondrej (advisor)
The main focus of this thesis is on network emulation. It contains introduction to the field of emulation and different experimentation methods. Part of this work is also devoted to the analysis of software and hardware emulators. Special emphasis is placed on the NetEm emulator, which is used in the practical part of this thesis. Practical part is focused on implementation of NetEm support for application LNST. Finally, test suite which is using this new implementation was created.
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Transmission network emulator
Urbanovský, Jozef ; Koton, Jaroslav (referee) ; Krajsa, Ondřej (advisor)
Diplomová práca sa zaoberá vývojom emulátoru prenosových parametrov dátovych sietí nad protokolovou sadou TCP/IP. Práca opisuje špecifiká sieťovej časti Linuxového jadra ako aj realizáciu emulátoru pomocou userspace programov ako tc, netem, ifb a iptables ovládajúcich jadro. Program pre emuláciu je realizovaný v jazyku Python a je ovládaný cez grafické rozhranie vytvorené s PyQt5. Aplikácia bola otestovaná a verifikovaná, že je dostatočne presnou reprezentáciou špecifikovanej WAN siete a že taktiež využíva prostriedky efektívne.
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Simulated Fault-Injection in Network Communication
Rozsíval, Michal ; Rogalewicz, Adam (referee) ; Smrčka, Aleš (advisor)
The development of network applications takes place under ideal conditions, as opposed to deploying them in a real-world environment that contains vulnerabilities such as loss, latency, or cyber-attacks. Ensuring resilience against these vulnerabilities is thus crucial. This thesis introduces the NetLoiter, which aims to enable the simulation of the required vulnerabilities and thus allow developers to treat them correctly. The NetLoiter can be used in transparent (proxy server), hidden (captures communication directly from the system kernel), or hardware versions suitable for testing embedded systems. NetLoiter supports dynamic reconfiguration using a public interface that can be used to automate the testing process. NetLoiter has been successfully integrated and used in real projects.
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Transmission network emulator
Urbanovský, Jozef ; Koton, Jaroslav (referee) ; Krajsa, Ondřej (advisor)
Diplomová práca sa zaoberá vývojom emulátoru prenosových parametrov dátovych sietí nad protokolovou sadou TCP/IP. Práca opisuje špecifiká sieťovej časti Linuxového jadra ako aj realizáciu emulátoru pomocou userspace programov ako tc, netem, ifb a iptables ovládajúcich jadro. Program pre emuláciu je realizovaný v jazyku Python a je ovládaný cez grafické rozhranie vytvorené s PyQt5. Aplikácia bola otestovaná a verifikovaná, že je dostatočne presnou reprezentáciou špecifikovanej WAN siete a že taktiež využíva prostriedky efektívne.
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Emulator Transmission Parameters of Data Networks
Grabovský, Štěpán
This paper deals with a development of a network emulator which is part of a complex ICT tester. This work contains an analysis of concurrent systems for network emulation, both proprietary and open-source. Afterward describes a conception of the emulator and discusses chosen technologies for each part of the emulator software structure.
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Laboratory scenarios describing DNS system
Sakala, Peter ; Langhammer, Lukáš (referee) ; Jeřábek, Jan (advisor)
The master’s thesis deals with Domain Name System (DNS) and its practical use. It describes hierarchy of domain names, resource record types, protocol used, as well as DNSSEC extension. The most utilized implementations of authoritative and recursive DNS servers are presented. Virtualization, containers and other tools with potential use in labs are described. Two lab scenarios in virtualized environment with instructions for students were designed and developed in this thesis.
|
|
|
Emulator transmission parameters of data networks
Grabovský, Štěpán ; Jeřábek, Jan (referee) ; Zeman, Václav (advisor)
This diploma thesis deals with a development of a network emulator operating in TCP/IP computers networks. This work contains a specification of transmission parameters and an analysis of concurrent systems both proprieties and open-sources. Afterward describes a relalization of the emulator itself. The core of the emulator uses well-known Linux tools tc, netem and iptables. An API of the program is realized by web service and for user interaction has been developed a web user interface. At the end of this work are listed and then discussed measured results of the emulator capabilities.
|
|
|
Implementation of NetEm support for LNST
Procházka, Jiří ; Marek, Marcel (referee) ; Lichtner, Ondrej (advisor)
The main focus of this thesis is on network emulation. It contains introduction to the field of emulation and different experimentation methods. Part of this work is also devoted to the analysis of software and hardware emulators. Special emphasis is placed on the NetEm emulator, which is used in the practical part of this thesis. Practical part is focused on implementation of NetEm support for application LNST. Finally, test suite which is using this new implementation was created.
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